CN116621259A - Preparation method of hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception - Google Patents
Preparation method of hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception Download PDFInfo
- Publication number
- CN116621259A CN116621259A CN202310578058.3A CN202310578058A CN116621259A CN 116621259 A CN116621259 A CN 116621259A CN 202310578058 A CN202310578058 A CN 202310578058A CN 116621259 A CN116621259 A CN 116621259A
- Authority
- CN
- China
- Prior art keywords
- hydrogel
- water
- sponge
- evaporator
- vocs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 239000000017 hydrogel Substances 0.000 title claims abstract description 102
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 66
- 238000000746 purification Methods 0.000 title abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000001704 evaporation Methods 0.000 claims abstract description 52
- 230000008020 evaporation Effects 0.000 claims abstract description 49
- 239000002131 composite material Substances 0.000 claims abstract description 33
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 32
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 32
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 32
- 239000000661 sodium alginate Substances 0.000 claims abstract description 32
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000004814 polyurethane Substances 0.000 claims abstract description 10
- 239000013535 sea water Substances 0.000 claims abstract description 9
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 22
- 239000000499 gel Substances 0.000 claims description 18
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 229920001661 Chitosan Polymers 0.000 claims description 15
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 238000004132 cross linking Methods 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 229920002101 Chitin Polymers 0.000 claims description 2
- MSFSPUZXLOGKHJ-UHFFFAOYSA-N Muraminsaeure Natural products OC(=O)C(C)OC1C(N)C(O)OC(CO)C1O MSFSPUZXLOGKHJ-UHFFFAOYSA-N 0.000 claims description 2
- 108010013639 Peptidoglycan Proteins 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 229920005610 lignin Polymers 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 206010067482 No adverse event Diseases 0.000 abstract 1
- 231100000252 nontoxic Toxicity 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 32
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 6
- 238000005286 illumination Methods 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 3
- 229940012189 methyl orange Drugs 0.000 description 3
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 3
- 229960000907 methylthioninium chloride Drugs 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- -1 salt ions Chemical class 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000001048 orange dye Substances 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002988 biodegradable polymer Polymers 0.000 description 1
- 239000004621 biodegradable polymer Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to a preparation method of a hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and efficient interception of VOCs, which comprises an evaporator, wherein the evaporator comprises an open wastewater containing tank, the top end of the wastewater containing tank is provided with a composite hydrogel sponge, the composite hydrogel sponge takes Polyurethane (PU) sponge as a carrier, and sodium alginate hydrogel and carbonized carbon materials are filled in the carrier. The preparation process is simple, the cost is low, no toxic effect is caused to the environment, the synchronous removal of VOCs in the solar evaporation process is expected to be realized in the actual operation process, and the application range of solar interface evaporation in sea water desalination and wastewater treatment is expanded.
Description
Technical Field
The invention relates to a preparation method of a hydrogel-based multifunctional solar evaporator for synchronously realizing water quality purification and efficient interception of VOCs, and belongs to the technical field of chemistry and environment.
Background
With the growth of population and the continuous expansion of industrial fields, the problems accompanying the growth of population and the continuous expansion of industrial fields, such as water resource shortage caused by water pollution, are also increasing. The solar energy interface evaporation technology only needs sunlight, has low cost and little pollution, and is considered as a green sustainable method for obtaining clean water especially in disaster-stricken and remote areas. In recent years, how to improve the evaporation rate of solar interface evaporation becomes a research hot spot, solar evaporators based on porous hydrogel, aerogel, various biomass and other related materials appear, solar evaporation technology advances in terms of photo-thermal conversion efficiency, salt management and the like, and evaporation rate and operation stability are effectively improved, however, the research of the current solar evaporation technology is mostly limited to the treatment of low-salinity brine in a short time, and no attention is paid to polluted water sources, especially the polluted water sources containing Volatile Organic Compounds (VOCs), and the current solar evaporation technology cannot be applied; when contaminated water sources contain Volatile Organic Compounds (VOCs), due to the high temperature of the air-water interface, these VOCs can evaporate with the water into the distilled water, causing secondary pollution of the condensed water and possibly even enrichment in the distilled water. Most photothermal materials currently developed can only separate water from non-volatile compounds by phase change, but cannot separate VOCs from wastewater. Therefore, the design and development of the efficient and environment-friendly evaporator and the matched application device thereof can continuously and effectively remove VOCs in water while realizing water quality purification, and have important significance for the interfacial evaporation of sewage.
Chinese patent document CN115282892 discloses a preparation method of a sandwich type long-acting salt-resistant gel photo-thermal evaporator, which can be used in the solar energy evaporation and utilization fields of sea water desalination, salt lake brine concentration, chemical wastewater recycling and the like, and the photo-thermal evaporator cannot treat a polluted water source containing Volatile Organic Compounds (VOCs).
Chinese patent document CN217584636U discloses a photoelectrocatalytic air-purifying air conditioner, comprising an evaporator, an ultraviolet light source and an external bias power supply; the evaporator comprises heat exchange fins and dual-function heat exchange fins which are fixed on the heat exchange tubes; the surface of the double-function heat exchange fin is in-situ grown with a photocatalysis material, the external bias power supply is connected with the double-function heat exchange fin through a lead, and the ultraviolet light source is arranged facing the double-function heat exchange fin, so that the degradation performance of VOCs is given to the double-function heat exchange fin under the condition of not changing the original structure of the air conditioner; the photoelectrocatalysis air-purifying air conditioner can only degrade VOCs in air, and is not applicable to polluted water sources containing Volatile Organic Compounds (VOCs).
Studies have shown that evaporator materials should have a strong water supply capacity to continuously transport water from the body to the evaporator surface. Hydrogels have highly tunable three-dimensional network structures with a large number of hydrophilic groups present in the polymer chain. Because of its high solvent compatibility and porous structure, water molecules readily diffuse through the hydrogel, and decreasing the enthalpy of evaporation of water in the hydrogel can increase the evaporation efficiency. Compared with synthetic hydrogel, natural hydrogel has good biocompatibility and low cost. Sodium Alginate (SA), a natural biodegradable polymer, contains a large number of hydroxyl groups and forms hydrogels through physical or chemical crosslinking. When designed as a solar evaporator, it can effectively promote the evaporation of water.
In addition, the photo-thermal conversion material used as a key part of the solar evaporator has the characteristics of strong full-spectrum absorption capacity, long-term stability and low cost, and can furthest improve the light absorption capacity, thereby reducing the energy loss of the surface. Among all possible candidate materials, carbon materials have a distinct competitive advantage due to their high solar energy absorbing capacity, excellent structural adjustability and ease of handling. And the carbon material has a self-rich pore structure and excellent adsorption-photocatalysis performance, so that the effective removal of VOCs can be promoted. Therefore, the application of carbon materials to solar evaporators for fresh water production is a recent research hotspot.
In summary, how to synchronously realize water quality purification and efficient interception of VOCs by using a solar evaporator has become a problem to be solved urgently at present.
Disclosure of Invention
Aiming at the defects of the prior art, in particular to the difficult problem that the existing solar evaporator cannot intercept Volatile Organic Compounds (VOCs) efficiently, the invention provides a preparation method of a hydrogel-based multifunctional solar evaporator for synchronously realizing water quality purification and VOCs interception efficiently.
Summary of the invention:
the invention takes sodium alginate hydrogel (SA) as a matrix, highly carbonized carbon materials are added into the solution, polyurethane (PU) sponge is taken as a carrier, ca is taken as 2+ The composite hydrogel sponge is prepared for the cross-linking agent, and the solar evaporator is constructed by the composite hydrogel sponge, so that the composite hydrogel sponge not only has good photo-thermal conversion effect and realizes high water evaporation rate, but also can continuously intercept VOCs in water by virtue of the super-strong adsorption-photo-catalytic degradation capability, so that the VOCs are prevented from being evaporated into distilled water along with the water, and the excellent performance of evaporation-adsorption-degradation is realized. In addition, the solar evaporator has good removal effect on different salt ions and organic dyes, and the performance of the solar evaporator is kept stable in the long-time running process of complex treatment water environment. The evaporator has the advantages of simple preparation process, low cost and no toxic or harmful effect on the environment, can realize the synchronous removal of VOCs in the solar evaporation process in the actual operation process, and expands the application range of solar interface evaporation in sea water desalination and wastewater treatment.
Detailed description of the invention:
the invention is realized by the following technical scheme:
the utility model provides a synchronous realization quality of water purifies and high-efficient hydrogel multi-functional solar evaporator who holds back of VOCs, which comprises an evaporator, transparent condensing cover and comdenstion water collecting vat, transparent condensing cover is located the top of evaporimeter and covers outside the evaporimeter, condense the vapor that produces in the evaporation process, the evaporimeter includes open-ended waste water holds the groove, the top that holds the groove in waste water is provided with compound hydrogel sponge, compound hydrogel sponge's below is connected with water transmission channel, the water that waits to purify is constantly transmitted to compound hydrogel sponge and evaporates, compound hydrogel sponge produces vapor after receiving solar heating, vapor gathers and gets into comdenstion water collecting vat after the condensation of transparent condensing cover, synchronous realization quality of water purifies and VOCs's high-efficient is held back;
the composite hydrogel sponge takes Polyurethane (PU) sponge as a carrier, and sodium alginate hydrogel and carbonized carbon materials are filled in the carrier.
According to the invention, the water transmission channel is made of cotton thread with the diameter of 4-10mm, and one or more water transmission channels are arranged.
According to the present invention, preferably, the condensed water collecting tank is located at the bottom of the transparent condensing cover and is connected with the transparent condensing cover.
According to the invention, preferably, the composite hydrogel sponge is covered above the wastewater containing tank, a heat insulation layer is arranged between the liquid level of the wastewater containing tank and the composite hydrogel sponge, and a water transmission channel penetrates through one end of the heat insulation layer to be connected with a water body to be purified, and the other end of the water transmission channel is connected with the composite hydrogel sponge.
According to the invention, the bottom of the waste water containing tank is provided with a water inlet, and the condensed water collecting tank is provided with a water outlet.
According to the invention, the composite hydrogel sponge is prepared by the following method:
(1) Mixing a carbon material with deionized water to obtain a mixture a, and heating and continuously stirring the mixture a until a uniform carbon material gel solution is formed;
(2) Drying the carbon material gel solution until xerogel is formed;
(3) Placing the xerogel material into a tubular furnace, and heating and calcining under the protection of argon to form a carbon carbide material;
(4) Grinding and sieving the carbon carbide material to obtain carbon carbide material powder;
(5) Mixing sodium alginate powder (SA) with deionized water to obtain a mixture b, and heating and continuously stirring the mixture b until the mixture b becomes a uniform and semitransparent sodium alginate gel solution;
(6) Continuously heating the sodium alginate gel, adding the carbonized carbon material powder in the step (4), and continuously stirring until the mixture is uniformly mixed to obtain a sodium alginate-carbon solution;
(7) Immersing the PU sponge into the sodium alginate-carbon solution in the step (6), and repeatedly squeezing until the interior of the sponge is completely and uniformly filled;
(8) Placing sponge filled with sodium alginate-carbon solution into Ca 2+ In solutionAnd (3) performing cross-linking, and fully washing with deionized water after the cross-linking is finished, so as to finally prepare the composite hydrogel sponge.
According to a preferred embodiment of the present invention, in the step (1), the carbon material is carboxymethyl chitosan material (C-CMCS), chitin, lignin or peptidoglycan.
Through numerous experiments, the carbon material is carboxymethyl chitosan material (C-CMCS) with the best effect, and can realize water purification and VOCs high-efficiency interception synchronously.
Most preferably, according to the present invention, in step (1), the carbon material is carboxymethyl chitosan material (C-CMCS).
According to the invention, in step (1), the carbon material is preferably used in an amount of 1 to 8% by weight based on the mass of the mixture a.
According to the invention, in the step (1), the heating temperature is 40-60 ℃ and the stirring time is 3-8h.
According to the invention, in step (2), the drying temperature is 50-70 ℃ and the drying time is 20-30h.
According to the invention, in the step (3), the calcination temperature is 700-900 ℃, the heating rate is 8-12 ℃/min, the heat preservation time is 20-60min, and the argon flow rate is 400-800mL/min.
According to a preferred embodiment of the present invention, in the step (4), the particle size of the carbonized carbon material powder is 80 to 150 mesh.
According to the invention, in step (5), sodium alginate is preferably used in an amount of 1 to 8% by weight based on the mass of mixture b.
According to the invention, in the step (5), the heating temperature is 40-60 ℃ and the stirring time is 3-8h.
According to the invention, in the step (6), the addition amount of the carbonized carbon material powder is 0.02 to 0.4 weight percent of the mass of the sodium alginate gel.
Further preferably, in the step (6), the addition amount of the carbon carbide material powder is 0.1-0.2wt% of the mass of the sodium alginate gel.
According to a preferred embodiment of the invention, in step (6), the heating is continued at a temperature of 75-85 ℃.
According to a preferred embodiment of the present invention, step (7) Wherein the density of the PU sponge is 5-20kg m -3 The thickness is 0.5-2cm, and the extrusion times are 20 times.
According to the present invention, in the step (8), ca is preferably 2+ The solution is CaCl 2 Solutions or Ca (NO) 3 Solution, caCl 2 Solutions or Ca (NO) 3 The concentration of the solution is 0.3-0.6mol L -1 。
According to the invention, in the step (8), the crosslinking time is 20-30h, and the deionized water washing times are 10 times.
The solar evaporator is applied to the treatment of the water containing VOCs or the desalination of the sea water containing VOCs.
The beneficial effects of the invention are as follows:
1. the invention takes sodium alginate hydrogel (SA) as a matrix, highly carbonized carboxymethyl chitosan material (C-CMCS) is added into the solution, polyurethane (PU) sponge is adopted as a carrier, ca is adopted 2+ The composite hydrogel sponge is prepared by a cross-linking agent, a solar evaporator is constructed by the composite hydrogel sponge, and VOCs are removed while photo-thermal conversion is realized by the composite hydrogel sponge, so that the VOCs are prevented from evaporating into distilled water along with water.
2. The hydrogel-based multifunctional solar evaporator disclosed by the invention not only has a good photo-thermal desalting effect, but also can continuously intercept VOCs in water by virtue of the super-strong adsorption-photo-catalytic degradation capability, shows excellent evaporation-adsorption-degradation performance, realizes the multifunctional application of solar evaporation, and achieves efficient and stable solar interface evaporation.
3. The hydrogel-based multifunctional solar evaporator disclosed by the invention has stable long-time operation performance, good long-time operation evaporation rate and VOCs removal effect, is simple, low in cost and favorable for large-scale popularization and application.
4. The hydrogel-based multifunctional solar evaporator provided by the invention has a good removal effect on different salt ions and organic dyes.
5. According to the invention, sodium alginate hydrogel (SA) is taken as a matrix, a highly carbonized carboxymethyl chitosan material (C-CMCS) is added into the solution, and a gel network is utilized to fix the carbon material, so that the defect that the photo-thermal conversion material cannot be directly used for water treatment is avoided, the photo-thermal conversion efficiency and the evaporation rate are fully improved, and a theoretical basis is laid for the subsequent practical application.
6. The hydrogel-based multifunctional solar evaporator material is low in cost, easy to obtain and harmless to the environment, and is a direct expression of a resource development and utilization mode taking 'reduction, recycling and harmlessness' as principles.
Drawings
FIG. 1 is a schematic diagram of a hydrogel-based multifunctional solar evaporator of the present invention;
in the figure, 1, a transparent condensation cover, 2, a composite hydrogel sponge, 3, a waste water containing groove, 4, a water inlet, 5, a condensed water collecting groove, 6, a water outlet, 7, cotton threads, 8 and a heat insulation layer.
FIG. 2 is a scanning electron microscope image of carbonized carboxymethyl chitosan (C-CMCS) obtained in the step (3) of the present invention in example 1;
FIG. 3 is a graph showing adsorption-desorption of carbonized carboxymethyl chitosan (C-CMCS) obtained in the step (3) of the present invention in example 1;
FIG. 4 is a graph of an X-ray photoelectron spectroscopy analysis of carbonized carboxymethyl chitosan (C-CMCS) obtained in the step (3) of the present invention in example 1;
FIG. 5 is a scanning electron microscope image of the composite hydrogel sponge obtained in example 1 of the present invention;
FIG. 6 is a graph showing the contact angle measurement of the composite hydrogel sponge obtained in example 1 of the present invention;
FIG. 7 is a graph showing the light absorptivity of the ultraviolet, visible and near infrared rays of the composite hydrogel sponge obtained in example 1 of the present invention;
FIG. 8 is a graph showing the comparison of the evaporation efficiency and the photo-thermal conversion efficiency of the hydrogel-based multifunctional solar evaporators of examples 1 to 5 and comparative example 1 according to the present invention.
Fig. 9 is a graph of the removal of VOCs from the hydrogel based multifunctional solar evaporators of examples 1-5 and comparative example 1 of the present invention.
FIG. 10 is a graph showing the comparison of the quality change of the hydrogel-based multifunctional solar evaporator of example 1 of the present invention under different illumination intensities.
FIG. 11 is a graph showing the comparison of evaporation rates of hydrogel-based multifunctional solar evaporators according to example 1 of the present invention under different illumination intensities.
FIG. 12 is a graph showing the comparative removal of VOCs by the hydrogel-based multifunctional solar evaporator of example 1 of the present invention under different illumination intensities.
FIG. 13 is a graph showing the comparison of evaporation rates of hydrogel-based multifunctional solar evaporators in phenol solutions of different concentrations in accordance with example 1 of the present invention.
FIG. 14 is a graph showing the comparative removal of VOCs in different concentrations of phenol solutions using the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 15 is a graph showing the comparison of evaporation rates of hydrogel-based multifunctional solar evaporators in different VOCs solutions according to example 1 of the present invention.
FIG. 16 is a graph showing the comparative removal of VOCs from various VOCs solutions by the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 17 is a graph showing the comparison of evaporation rates of hydrogel-based multifunctional solar evaporators in different NaCl solutions according to example 1 of the present invention.
FIG. 18 shows Na in different NaCl solutions for a hydrogel-based multifunctional solar evaporator according to example 1 of the present invention + The comparison graph is removed.
FIG. 19 is a graph showing the comparative removal of VOCs in different NaCl solutions by using the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 20 is a graph showing the comparison of evaporation rates of hydrogel-based multifunctional solar evaporators according to example 1 of the present invention under different pH conditions.
FIG. 21 is a graph showing the comparative removal of VOCs at different pH conditions for the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 22 is a graph showing the comparison of the light intensity and evaporation rate under natural light conditions for the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 23 is a graph showing the comparative removal of VOCs under natural light conditions for the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 24 is a graph comparing the removal of VOCs and the morphology of the evaporator of example 1 of the present invention during 7 consecutive days of operation.
FIG. 25 is a graph comparing the evaporation rates of hydrogel-based multifunctional solar evaporators of example 1 of the present invention in methylene blue and methyl orange solutions.
FIG. 26 is a graph showing the removal rate and concentration comparison of methylene blue and methyl orange dyes by the hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 27 is a graph of color comparison of methylene blue and methyl orange dyes before and after evaporation by a hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 28 is a graph showing the mass change and evaporation rate of hydrogel-based multifunctional solar evaporators in seawater and pond water according to example 1 of the present invention.
FIG. 29 is a graph showing the comparative ion removal in seawater of a hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
FIG. 30 is a graph comparing Total Organic Carbon (TOC) in seawater and pond water for a hydrogel-based multifunctional solar evaporator of example 1 of the present invention.
Detailed Description
The patent of the invention is further described below by way of specific examples in connection with the accompanying drawings,
the raw materials used in the examples were all conventional purchased products.
Example 1,
The hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception has a structure shown in figure 1, and comprises an evaporator, a transparent condensation cover 1 and a condensed water collecting tank 5, wherein the evaporator is positioned in the transparent condensation cover 1, the transparent condensation cover 1 is positioned above the evaporator and covers the outside of the evaporator, and water vapor generated in the evaporation process is condensed in time; the bottom of the transparent condensation cover 1 is provided with a condensed water collecting tank 5, the condensed water collecting tank is used for collecting cooled condensed water, and the condensed water collecting tank 5 is provided with a water outlet 6; the evaporator comprises an open wastewater containing tank 3, a water inlet 4 is formed in the bottom of the wastewater containing tank 3, a composite hydrogel sponge 2 is arranged at the top end of the wastewater containing tank, cotton threads 7 are connected below the composite hydrogel sponge 2 and serve as water transmission channels, and water to be purified is transmitted to the evaporator continuously to be evaporated; a heat insulation layer 8 is arranged between the top end of the wastewater containing groove and the composite hydrogel sponge 2, the heat insulation layer 8 is a polystyrene foam layer, heat loss is reduced, and evaporation efficiency is improved. One end of the cotton thread 7 penetrates through the heat insulation layer 8 to be connected with the water body to be purified, and the other end of the cotton thread is connected with the composite hydrogel sponge 2.
The water to be purified is continuously transmitted to the composite hydrogel sponge for evaporation, the composite hydrogel sponge generates water vapor after receiving solar energy for heating, the water vapor is condensed by the transparent condensation cover, and condensed water is collected into the condensed water collecting tank, so that water quality purification and efficient interception of VOCs are synchronously realized;
the composite hydrogel sponge is prepared by the following steps:
(1) 2g of carboxymethyl chitosan powder (CMCS) and 100mL of deionized water are placed into a beaker, heated in a water bath at 50 ℃ and continuously stirred until a uniform carboxymethyl chitosan gel solution is formed;
(2) Pouring the carboxymethyl chitosan gel solution prepared in the step (1) into a culture dish, placing the culture dish into an electrothermal blowing drying box, and drying for 24 hours at the temperature of 60 ℃ until xerogel is formed;
(3) Crushing the xerogel material obtained in the step (2), putting the crushed xerogel material into a crucible, placing the crucible into a tube furnace, and heating and calcining the crushed xerogel material under the protection of 600mL/min argon gas at the temperature of 800 ℃, the heating speed of 10 ℃ and the heat preservation time of 30min to form carbonized carboxymethyl chitosan (C-CMCS).
The scanning electron microscope, adsorption-desorption curve and X-ray photoelectron spectrum of the obtained carbonized carboxymethyl chitosan are shown in figures 2-4.
(4) Grinding the sample obtained in the step (3) and sieving the ground sample into uniform C-CMCS powder with the particle size of 100 meshes for subsequent use;
(5) Mixing 4g of sodium alginate powder (SA) and 100mL of deionized water, heating in an oil bath at 80 ℃ and continuously stirring for 4 hours until the sodium alginate powder becomes a uniform and semitransparent sodium alginate gel liquid;
(6) Continuously heating the sodium alginate gel solution prepared in the step (5), adding 0.2g of the C-CMCS powder obtained in the step (4), and continuously stirring for 1h until the solution is uniformly mixed to obtain an SA/C-CMCS mixed solution;
(7) Immersing the PU sponge with the thickness of 1cm into the SA/C-CMCS mixed solution prepared in the step (6), and repeatedly extruding for 20 times until the interior of the sponge is completely filled;
(8) Placing the sponge completely filled with SA/C-CMCS solution in step (7) at a concentration of 0.5mol L -1 After crosslinking for 24 hours in the Ca < 2+ > solution, washing for 10 times by deionized water, and finally obtaining the composite hydrogel sponge.
The obtained composite hydrogel sponge has the light absorptivity of scanning electron microscope, contact angle and ultraviolet visible near infrared as shown in figures 5-7.
EXAMPLE 2,
The hydrogel-based multifunctional solar evaporator of example 1, except:
in step (6), the amount of C-CMCS powder added was 0.025g, and other parameters and conditions were the same as those of example 1.
EXAMPLE 3,
The hydrogel-based multifunctional solar evaporator of example 1, except:
in step (6), the amount of C-CMCS powder added was 0.05g, and other parameters and conditions were the same as in example 1.
EXAMPLE 4,
The hydrogel-based multifunctional solar evaporator of example 1, except:
in step (6), the amount of C-CMCS powder added was 0.1g, and other parameters and conditions were the same as in example 1.
EXAMPLE 5,
The hydrogel-based multifunctional solar evaporator of example 1, except:
in step (6), the amount of C-CMCS powder added was 0.15g, and other parameters and conditions were the same as in example 1.
Comparative example 1,
The hydrogel-based multifunctional solar evaporator of example 1, except:
in step (6), the amount of C-CMCS powder added was 0g, and other parameters and conditions were the same as in example 1.
The following are evaporation and VOCs removal experiments under 1 sun for evaporators prepared under different conditions.
Experimental example 1,
Examples 1 to 5 and comparative example 1 were subjected to experiments for evaporation of pure water under 1 sun and removal of VOCs, and the experimental results are shown in fig. 8 and 9.
The evaporation and VOCs removal experiments for the evaporator of example 1 are as follows.
Experimental example 2,
The experimental results of the evaporated pure water and VOCs removal by the solar evaporator of example 1 under different illumination intensities are shown in fig. 10, 11 and 12.
Experimental example 3,
The experimental results of the evaporation and removal of phenol solutions of different concentrations by the solar evaporator of example 1 under 1 sun are shown in fig. 13 and 14.
Experimental example 4,
The solar evaporator of example 1 was tested for evaporation and removal of different VOCs solutions under 1 sun, and the test results are shown in fig. 15 and 16.
Experimental example 5,
Example 1 was subjected to evaporation and VOCs removal experiments in NaCl solutions of different concentrations, and the experimental results are shown in fig. 17, 18, and 19.
Experimental example 6,
The solar evaporator of example 1 was subjected to evaporation and VOCs removal experiments in solutions of different pH, and the experimental results are shown in fig. 20 and 21.
Experimental example 7,
The evaporation and VOCs removal experiments under natural light conditions were performed by the solar evaporator of example 1, and the experimental results are shown in fig. 22 and 23.
Experimental example 8,
The solar evaporator of example 1 was subjected to continuous 7d evaporation and VOCs removal experiments under 1 sun, and the experimental results are shown in fig. 24.
Experimental example 9,
The solar evaporator of example 1 was subjected to experiments for evaporating different organic dyes under 1 sun, and the experimental results are shown in fig. 25, 26 and 27.
Experimental example 10,
The experimental results of the solar evaporator of example 1 for evaporating seawater and pond water under 1 sun are shown in fig. 28, 29 and 30.
To sum up: with the increase of the concentration of the C-CMCS, the evaporation rate of the evaporator is continuously accelerated, the photo-thermal conversion efficiency is gradually increased, the VOCs removal efficiency is continuously increased, and the stable effect is maintained in 7d operation; as the illumination intensity increases, the evaporation rate of the evaporator increases, but the VOCs removal efficiency of the evaporator decreases; phenol concentration and VOCs species have little effect on evaporation rate and VOCs removal; the evaporation rate of the evaporator has wide adaptability to NaCl concentration and pH conditions, but the pH conditions of strong acid or strong alkali influence the removal efficiency of the evaporator on VOCs; the increase of NaCl concentration can reduce the removal efficiency of the evaporator to VOCs, and in addition, the evaporator also achieves good removal effect to metal salt ions and organic dyes; the total organic carbon content (TOC) is also greatly reduced.
Claims (10)
1. The utility model provides a synchronous realization quality of water purifies and high-efficient hydrogel multi-functional solar evaporator who holds back of VOCs, which comprises an evaporator, transparent condensing cover and comdenstion water collecting vat, transparent condensing cover is located the top of evaporimeter and covers outside the evaporimeter, condense the vapor that produces in the evaporation process, the evaporimeter includes open-ended waste water holds the groove, the top that holds the groove in waste water is provided with compound hydrogel sponge, compound hydrogel sponge's below is connected with water transmission channel, the water that waits to purify is constantly transmitted to compound hydrogel sponge and evaporates, compound hydrogel sponge produces vapor after receiving solar heating, vapor gathers and gets into comdenstion water collecting vat after the condensation of transparent condensing cover, synchronous realization quality of water purifies and VOCs's high-efficient is held back;
the composite hydrogel sponge takes Polyurethane (PU) sponge as a carrier, and sodium alginate hydrogel and carbonized carbon materials are filled in the carrier.
2. The hydrogel-based multifunctional solar evaporator of claim 1, wherein the water transmission channel is made of cotton thread and has a diameter of 4-10mm, one or more water transmission channels are arranged, the condensed water collecting tank is positioned at the bottom of the transparent condensing cover and is connected with the transparent condensing cover, the composite hydrogel sponge is covered above the waste water containing tank, a heat insulation layer is arranged between the liquid level of the waste water containing tank and the composite hydrogel sponge, one end of the water transmission channel, which passes through the heat insulation layer, is connected with a water body to be purified, the other end of the water transmission channel is connected with the composite hydrogel sponge, a water inlet is arranged at the bottom of the waste water containing tank, and a water outlet is arranged in the condensed water collecting tank.
3. The hydrogel-based multifunctional solar evaporator of claim 1, wherein the composite hydrogel sponge is prepared by the following method:
(1) Mixing a carbon material with deionized water to obtain a mixture a, and heating and continuously stirring the mixture a until a uniform carbon material gel solution is formed;
(2) Drying the carbon material gel solution until xerogel is formed;
(3) Placing the xerogel material into a tubular furnace, and heating and calcining under the protection of argon to form a carbon carbide material;
(4) Grinding and sieving the carbon carbide material to obtain carbon carbide material powder;
(5) Mixing sodium alginate powder (SA) with deionized water to obtain a mixture b, and heating and continuously stirring the mixture b until the mixture b becomes a uniform and semitransparent sodium alginate gel solution;
(6) Continuously heating the sodium alginate gel, adding the carbonized carbon material powder in the step (4), and continuously stirring until the mixture is uniformly mixed to obtain a sodium alginate-carbon solution;
(7) Immersing the PU sponge into the sodium alginate-carbon solution in the step (6), and repeatedly squeezing until the interior of the sponge is completely and uniformly filled;
(8) Placing sponge filled with sodium alginate-carbon solution into Ca 2+ And (3) crosslinking in the solution, and fully washing with deionized water after crosslinking is finished, so as to finally prepare the composite hydrogel sponge.
4. The hydrogel-based multifunctional solar evaporator of claim 3, wherein in step (1), the carbon material is carboxymethyl chitosan material (C-CMCS), chitin, lignin, or peptidoglycan.
5. The hydrogel-based multifunctional solar evaporator of claim 3, wherein in step (1), the carbon material is carboxymethyl chitosan material (C-CMCS).
6. The hydrogel-based multifunctional solar evaporator of claim 3, wherein in step (1), the carbon material is used in an amount of 1-8wt% based on the mass of the mixture a, the heating temperature is 40-60 ℃, and the stirring time is 3-8 hours.
7. The hydrogel-based multifunctional solar evaporator of claim 3, wherein in step (2), the drying temperature is 50-70 ℃, the drying time is 20-30 hours, in step (3), the calcining temperature is 700-900 ℃, the heating rate is 8-12 ℃/min, the holding time is 20-60min, the argon flow rate is 400-800mL/min, in step (4), the particle size of the carbonized carbon material powder is 80-150 mesh, in step (5), the sodium alginate is 1-8wt% of the mass of the mixture b, in step (5), the heating temperature is 40-60 ℃, and the stirring time is 3-8 hours.
8. The hydrogel-based multifunctional solar evaporator of claim 3, wherein the amount of carbon carbide material powder added in step (6) is 0.02-0.4wt% of the mass of the sodium alginate gel, preferably, the amount of carbon carbide material powder added in step (6) is 0.1-0.2wt% of the mass of the sodium alginate gel, preferably, the continuous heating temperature in step (6) is 75-85 ℃.
9. The hydrogel-based multifunctional solar evaporator of claim 3, wherein in step (7), the PU sponge has a density of 5-20kg m -3 The thickness is 0.5-2cm, the extrusion times are 20 times, in the step (8), ca 2+ The solution is CaCl 2 Solutions or Ca (NO) 3 Solution, caCl 2 Solutions or Ca (NO) 3 The concentration of the solution is 0.3-0.6mol L -1 In the step (8), the crosslinking time is 20-30h, and the washing times of deionized water are 10 times.
10. Use of the solar evaporator of claim 1 in the treatment of water containing VOCs or desalinating seawater containing VOCs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310578058.3A CN116621259A (en) | 2023-05-22 | 2023-05-22 | Preparation method of hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310578058.3A CN116621259A (en) | 2023-05-22 | 2023-05-22 | Preparation method of hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116621259A true CN116621259A (en) | 2023-08-22 |
Family
ID=87641177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310578058.3A Pending CN116621259A (en) | 2023-05-22 | 2023-05-22 | Preparation method of hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116621259A (en) |
-
2023
- 2023-05-22 CN CN202310578058.3A patent/CN116621259A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110143645B (en) | Solar photo-thermal membrane distillation device | |
| CN110105917B (en) | Photo-thermal composite material and preparation method and application thereof | |
| CN113307321B (en) | Solar interface evaporator and application thereof | |
| CN113860413B (en) | Solar evaporator based on biomass hydrogel/nano carbon material and application thereof | |
| CN110183572B (en) | Aerogel, preparation method and application of aerogel as solar evaporator | |
| CN113184940A (en) | Photo-thermal conversion material and application thereof in seawater desalination and salt recovery | |
| CN114702093B (en) | Method for preparing three-dimensional porous salt-resistant interface evaporator by CNTs modified polyurethane sponge | |
| CN111547802A (en) | Multistage ladder-shaped distiller and method for solar photo-thermal evaporation seawater desalination | |
| CN113149312B (en) | Device and method for separating concentrated solution by surface photo-thermal evaporation treatment of landfill leachate film | |
| CN114525115A (en) | Typha angustifolia based photo-thermal interface evaporation material and preparation method and application thereof | |
| CN116143216A (en) | Solar interface evaporator, preparation and application | |
| CN212292886U (en) | Multi-stage ladder-shaped distiller for solar photo-thermal evaporation seawater desalination | |
| CN116621259A (en) | Preparation method of hydrogel-based multifunctional solar evaporator capable of synchronously realizing water quality purification and VOCs high-efficiency interception | |
| CN115180673B (en) | System and method for regenerating printing and dyeing wastewater by utilizing waste heat and solar film evaporation | |
| CN210419368U (en) | Solar photo-thermal membrane distillation device | |
| CN116712939A (en) | Porous carbon hydrogels for efficient solar interfacial evaporation | |
| CN115159607B (en) | Solar evaporation and salt crystallization collection device with separated light-receiving surface and evaporation surface | |
| CN115260612B (en) | Wood fiber-based foam material with high photo-thermal conversion efficiency and preparation and application thereof | |
| CN108554381A (en) | A kind of Solidago Canadensis carbide and its preparation method and application | |
| CN215208944U (en) | Device for separating concentrated solution by using membrane for treating landfill leachate through surface photothermal evaporation | |
| CN110237724B (en) | Preparation method and application of carbon-based Janus film | |
| CN112028158A (en) | Solar-driven water treatment device | |
| CN111439801A (en) | Method for photo-thermal photocatalytic co-treatment of high-salinity organic wastewater by using nitrided graphene composite nanofiber membrane | |
| CN113247980B (en) | Composite photothermal conversion material based on shaddock peel, and preparation and application thereof | |
| CN115093679B (en) | PBAT porous sponge and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |