CN112520807A - Preparation method and application of floating MXene assembly photo-thermal conversion material - Google Patents
Preparation method and application of floating MXene assembly photo-thermal conversion material Download PDFInfo
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- CN112520807A CN112520807A CN202011463871.9A CN202011463871A CN112520807A CN 112520807 A CN112520807 A CN 112520807A CN 202011463871 A CN202011463871 A CN 202011463871A CN 112520807 A CN112520807 A CN 112520807A
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- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 18
- 238000007667 floating Methods 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 239000000149 chemical water pollutant Substances 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 238000007710 freezing Methods 0.000 claims abstract description 10
- 230000008014 freezing Effects 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 10
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 10
- 238000009777 vacuum freeze-drying Methods 0.000 claims abstract description 7
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 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 description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000000661 sodium alginate Substances 0.000 claims description 3
- 235000010413 sodium alginate Nutrition 0.000 claims description 3
- 229940005550 sodium alginate Drugs 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 2
- 239000002033 PVDF binder Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- 239000004816 latex Substances 0.000 claims description 2
- 229920000126 latex Polymers 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000005543 nano-size silicon particle Substances 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 125000005385 peroxodisulfate group Chemical group 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 229910052706 scandium Inorganic materials 0.000 claims description 2
- 239000011115 styrene butadiene Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims 1
- 239000001768 carboxy methyl cellulose Substances 0.000 claims 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims 1
- 238000007725 thermal activation Methods 0.000 claims 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000002207 thermal evaporation Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000012492 regenerant Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 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 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- 239000012425 OXONE® Substances 0.000 description 1
- 229910009819 Ti3C2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- HJKYXKSLRZKNSI-UHFFFAOYSA-I pentapotassium;hydrogen sulfate;oxido sulfate;sulfuric acid Chemical compound [K+].[K+].[K+].[K+].[K+].OS([O-])(=O)=O.[O-]S([O-])(=O)=O.OS(=O)(=O)O[O-].OS(=O)(=O)O[O-] HJKYXKSLRZKNSI-UHFFFAOYSA-I 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Images
Classifications
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- 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
- C02F1/30—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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physical Water Treatments (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to a preparation method and application of a floating MXene assembly photo-thermal conversion material, and belongs to the field of environmental protection. A preparation method of a floating MXene assembly photothermal conversion material comprises the steps of uniformly mixing MXene and a binder in water, carrying out directional freezing by using liquid nitrogen, and carrying out vacuum freeze drying to obtain a three-dimensional assembly, wherein the MXene is M in structural formulan+1XnN is 1, 2 or 3, M is a transition metal element, and X is C or N. The MXene assembly photo-thermal conversion material provided by the invention has the advantages that the density of the photo-thermal conversion material is mixed with the density of the material, the material is added into landfill leachate and can float on the surface of the liquid, and meanwhile, the material can be used for adding the materialThe sunlight is converted into heat energy, so that persulfate in the solution is activated, and the aim of removing organic pollutants in the landfill leachate is fulfilled.
Description
Technical Field
The invention relates to a preparation method and application of a floating MXene assembly photo-thermal conversion material, and belongs to the field of environmental protection.
Background
The treatment of landfill leachate is always a difficult point and a pain point for the treatment of environmental pollution. The landfill leachate has complex components and contains various pollutants such as refractory organic pollutants, metal ions, high-concentration inorganic salt and the like. Because the types of pollutants contained in the biological filter are complex and most of the pollutants have biological toxicity, the treatment procedure is complex and the cost is high.
The commonly used method for treating the landfill leachate mainly comprises the steps of front-stage physical and chemical treatment, middle-stage biological treatment, tail-end membrane concentration and thermal evaporation. Landfill leachate contains biological toxic substances, so the stability of the biological method is poor. Membrane processes and thermal evaporation are costly and are only a concentrated transfer of contaminants and not a true contaminant removal process.
Thermally activated persulfate is an advanced oxidation process that can remove most refractory organic pollutants, but the energy cost required to heat the water is high. The photothermal conversion material refers to a series of materials capable of converting light energy into heat energy. The photothermal conversion material is combined with the persulfate advanced oxidation technology, clean solar energy can be utilized to generate heat, the treatment cost is obviously reduced, and the degradation of organic pollutants and the recovery of landfill leachate regenerated water are realized simultaneously.
Disclosure of Invention
The invention aims to prepare a high-efficiency floating type photothermal conversion material and provides a high-efficiency and low-cost landfill leachate treatment method.
A method for preparing floating MXene assembly photothermal conversion material comprises mixing MXene and binder in water, directionally freezing with liquid nitrogen, vacuum freeze drying to obtain three-dimensional assembly,
wherein MXene is represented by the structural formula Mn+1XnN is 1, 2, 3, M is a transitionMetal element, X is C or N.
Preferably, M is Sc, Ti, V, Cr, Zr, Nb, Mo, Hf or Ta; .
Preferably, the binder is one or more of sodium hydroxymethyl cellulose, calcium chloride, polyvinylidene fluoride, N-methyl pyrrolidone, polytetrafluoroethylene, perfluorosulfonic acid, styrene-butadiene latex, nano silicon powder and sodium alginate.
Preferably, the binder is added in the form of a binder compound, a binder solution or a binder dispersion.
Preferably, the mass ratio of MXene to the binder is 1: 0.1-1: 10.
Preferably, the ratio of MXene to water is 1: 0.1-1: 10.
Preferably, the directional freezing is freezing and freezing the mixed solution of MXene and the binder from the bottom of the solution to the top by using liquid nitrogen.
Preferably, the temperature of the vacuum freeze drying is-30 ℃ to-20 ℃.
The invention also aims to provide an application of the floating MXene assembly photothermal conversion material in heat activation persulfate treatment of landfill leachate, which specifically comprises the following steps: the MXene assembly light-heat conversion material floats on the surface of the landfill leachate containing persulfate to be treated, and is treated under the irradiation of sunlight.
Further, the persulfate includes peroxodisulfate and monopersulfate.
The invention has the beneficial effects that: the MXene assembly photo-thermal conversion material provided by the invention is low in density, and can float on the liquid surface when being added into landfill leachate, and meanwhile, the material can convert sunlight into heat energy to further activate persulfate in the solution, so that the aim of removing organic pollutants in the landfill leachate is fulfilled. Meanwhile, steam formed by the photothermal conversion and thermal evaporation of the MXene assembly can be condensed and recovered, and the recycling of the regenerated water is realized. Compared with the existing landfill leachate treatment method, the method has the following advantages: the treatment process is simple, the pretreatment process is not needed, and the cost is low. The invention can simultaneously realize the degradation of organic pollutants and the recycling of reclaimed water.
Drawings
Fig. 1 is a scanning electron microscope image of an MXene assembly prepared using the method of the present technology. As can be seen, the resulting assembly has a porous and porous structure.
Fig. 2 is a schematic diagram of the application of the present invention. Garbage percolate, a floating MXene assembly, a condensation plate and reclaimed water.
Fig. 3 is an infrared thermometry chart for the application of the present invention. The temperature of the three-dimensional assembly can reach 112 ℃ under the irradiation of visible light.
Detailed Description
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way.
The test methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
Example 1
Weighing 0.1g Ti3C2MXene and 0.1g of an aqueous dispersion of Polytetrafluoroethylene (PTFE) (60% by mass) were added to 100mL of water, and stirred for 1h at 500rpm using a magnetic stirrer. Then, liquid nitrogen is used for directional freezing, and MXene assembly is obtained after vacuum freeze drying for 24h at the temperature of minus 20 ℃. MXene assemblies were added to landfill leachate containing 5mM sodium peroxodisulfate using 1000Wm-2The assembly is irradiated by the simulated sunlight, and the Chemical Oxygen Demand (COD) removal rate of the landfill leachate after 10 hours of illumination is measured to be 40%. The steam was collected using a condensing plate to give about 9mL of regeneration water with a COD removal rate of 93%.
Example 2
Weighing 0.1gNb2C MXene and 0.3g of perfluorosulfonic acid solution (commercially available Nafion 117 solution) were added to 100ml of water and stirred for 6h at 1000rpm using a magnetic stirrer. Then directionally freezing with liquid nitrogen to obtain a solid, and finally carrying out vacuum freeze drying at-30 ℃ for 72h to obtain the MXene assembly. Assembling MXeneThe body is added to landfill leachate containing 5mM potassium monopersulfate, using 1000Wm-2The assembly body is irradiated by the simulated sunlight, and the COD removal rate of the landfill leachate after 10 hours of illumination is measured to be 54 percent. The steam was collected using a cold plate to give about 10mL of regenerant water with a COD removal of 96%.
Example 3
Weighing 0.1gMo2C MXene and 0.05g sodium alginate were added to 100ml water and stirred using a magnetic stirrer at 800rpm for 24 h. Performing directional freezing by using liquid nitrogen, and then performing vacuum freeze-drying for 48h at the temperature of minus 30 ℃ to obtain the MXene assembly. MXene assemblies were added to landfill leachate containing 2mM sodium peroxodisulfate using 1000Wm-2The assembly body is irradiated by the simulated sunlight, and the COD removal rate of the landfill leachate after 10 hours of illumination is measured to be 27%. The steam was collected using a cold plate to give about 9mL of regenerant water with a COD removal of 84%.
Claims (9)
1. A preparation method of a floating MXene assembly photo-thermal conversion material is characterized by comprising the following steps: MXene and a binder are uniformly mixed in water, liquid nitrogen is used for directional freezing, then vacuum freeze drying is carried out to obtain a three-dimensional assembly,
wherein MXene is represented by the structural formula Mn+1XnN is 1, 2 or 3, M is a transition metal element, and X is C or N.
2. The method of claim 1, wherein: m is Sc, Ti, V, Cr, Zr, Nb, Mo, Hf or Ta; .
3. The method of claim 1, wherein: the binder is one or more of sodium carboxymethylcellulose, calcium chloride, polyvinylidene fluoride, N-methyl pyrrolidone, polytetrafluoroethylene, perfluorosulfonic acid, styrene-butadiene latex, nano silicon powder and sodium alginate.
4. The method of claim 1, wherein: the binder is added in the form of a binder compound, a binder solution or a binder dispersion.
5. The method of claim 1, wherein: the mass ratio of the MXene to the binder is 1: 0.1-1: 10.
6. The method of claim 1, wherein: the ratio of MXene to water is 1: 0.1-1: 10.
7. The method of claim 1, wherein: the directional freezing is that the mixed solution of MXene and the binder is frozen and frozen from bottom to top in sequence by using liquid nitrogen.
8. The floating MXene assembly photothermal conversion material prepared by any one of the methods of claims 1-7 is applied to the thermal activation of persulfate treatment of landfill leachate, and is characterized in that: the MXene assembly light-heat conversion material floats on the surface of the landfill leachate containing persulfate to be treated, and is treated under the irradiation of sunlight.
9. Use according to claim 8, characterized in that: the persulfate includes peroxodisulfate and monopersulfate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463871.9A CN112520807A (en) | 2020-12-11 | 2020-12-11 | Preparation method and application of floating MXene assembly photo-thermal conversion material |
| PCT/CN2021/135169 WO2022121777A1 (en) | 2020-12-11 | 2021-12-02 | Preparation method for floating mxene assembly solar-thermal conversion material, and application thereof |
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| CN202011463871.9A CN112520807A (en) | 2020-12-11 | 2020-12-11 | Preparation method and application of floating MXene assembly photo-thermal conversion material |
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| WO2022121777A1 (en) * | 2020-12-11 | 2022-06-16 | 东莞理工学院 | Preparation method for floating mxene assembly solar-thermal conversion material, and application thereof |
| CN115286060A (en) * | 2022-07-15 | 2022-11-04 | 东莞理工学院 | MXene @ bamboo fiber assembly and preparation method and application thereof |
| CN115403129A (en) * | 2022-08-02 | 2022-11-29 | 上海市政工程设计研究总院（集团）有限公司 | Method for activating persulfate through photo-thermal coupling and application thereof |
| CN115490379A (en) * | 2022-04-14 | 2022-12-20 | 同济大学 | Method for removing micropollutants in water by using photo-thermal activated peracetic acid |
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- 2021-12-02 WO PCT/CN2021/135169 patent/WO2022121777A1/en active Application Filing
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| CN113171779A (en) * | 2021-04-28 | 2021-07-27 | 东莞理工学院 | Preparation method and application of B-site five-membered high-entropy perovskite catalyst |
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