CN110694604B - TiO (titanium dioxide) 2 PPy super-infiltration photocatalytic composite material and preparation method thereof - Google Patents
TiO (titanium dioxide) 2 PPy super-infiltration photocatalytic composite material and preparation method thereof Download PDFInfo
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 27
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 238000001764 infiltration Methods 0.000 title claims abstract description 4
- 229920000128 polypyrrole Polymers 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 11
- 239000002243 precursor Substances 0.000 claims abstract description 9
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 5
- 238000004729 solvothermal method Methods 0.000 claims abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 13
- 229920000877 Melamine resin Polymers 0.000 claims description 10
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 7
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 claims description 6
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 229920001940 conductive polymer Polymers 0.000 abstract description 11
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
- 231100000719 pollutant Toxicity 0.000 abstract description 9
- 238000001228 spectrum Methods 0.000 abstract description 7
- 238000011065 in-situ storage Methods 0.000 abstract description 4
- 230000000593 degrading effect Effects 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 2
- 239000000758 substrate Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 238000006243 chemical reaction Methods 0.000 description 18
- 229910010413 TiO 2 Inorganic materials 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000000926 separation method Methods 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 6
- 239000002957 persistent organic pollutant Substances 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 2
- 229940043267 rhodamine b Drugs 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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Abstract
TiO (titanium dioxide) 2 The preparation method of the PPy super-infiltration photocatalytic composite material comprises the following steps: uniformly carrying titanium dioxide particles on the surface of a matrix by using a material with a sponge structure as the matrix through a solvothermal method; and loading ferric trichloride on a substrate loaded with titanium dioxide particles to obtain a precursor, and forming a polypyrrole film on the surface of the precursor by a chemical vapor deposition method. The titanium dioxide film generated on the sponge in situ has uniform thickness and forms a good composite interface with the vapor deposited conductive polymer, so that the composite material has more active sites, the synergistic effect of the titanium dioxide and the conductive polymer and the heterostructure endows the material with excellent full-spectrum photocatalytic performance, and the material is used for rapidly degrading water-soluble pollutants. In addition, the modified composite sponge has high surface energy and micro-nano coarse structure, so that the material has the performance of underwater super oleophobic, and can be used for continuously separating wastewater containing hydrophobic pollutants.
Description
Technical Field
The invention belongs to the field of nano composite material preparation, and in particular relates to TiO 2 -a preparation method of a PPy super-impregnation photocatalytic composite material.
Background
Water is a source of life and is an indispensable resource for maintaining the function of the ecosystem and supporting the socioeconomic development. However, with the acceleration of the urban process and the rapid development of modern industry and agriculture, water pollution is more serious, especially the types and the quantity of organic pollutants are increased, various organic pollutants with different properties such as water solubility, hydrophobicity and the like coexist in wastewater, but the traditional separation material is usually only specific to one type of pollutant, has single function, and is difficult to remove the organic pollutants of different types simultaneously.
The Chinese patent application No. CN201811251260.0 discloses a preparation method of an underwater super oleophobic high-flow-rate oil-water separation net which is easy to prepare, the Chinese patent application No. CN201710924555.9 discloses a preparation and application method of an oil-water separation net film with different wettabilities, and the method has proved to be effective in improving oil-water separation, but can not effectively remove soluble organic pollutants in water, so that the application of the method is limited to a certain extent. Therefore, there is a need to develop a composite material with efficient oil-water separation and degradation of soluble contaminants in water to solve the above environmental problems.
An important measure in solving the problem of organic pollution in water is the photocatalysis technology. Conventional photocatalysts are mainly powder and supported, but these catalysts have many drawbacks. Such as powder catalysts, are difficult to recycle and cannot be reused (science 2001.293.261-71); the supported catalyst has better mechanical strength, but most of the selected matrixes are fragile and cannot be used for continuous operation with high strength (chem. Soc. Rev. 2012.41.666-686). Therefore, the development of the high-efficiency photocatalytic material with excellent mechanical properties has great practical significance in water pollution treatment.
Disclosure of Invention
Therefore, the project proposes to use TiO 2 And the conductive polymer is used as a construction element, and the porous material with visible light catalysis and underwater super-oleophobic functions is prepared through in-situ growth, surface modification and structure regulation. On one hand, the underwater super-oleophobic property of the material is utilized to selectively allow water to pass through, and insoluble pollutants in water are removed in a water-oil resistance mode; on the other hand, the high adsorption property of the material is utilized to enrich the soluble pollutants in water, and the supported photocatalytic material is used for rapidly catalyzing and degrading the soluble pollutants so as to achieve the purpose of removing the water-soluble pollutants. Therefore, by designing the super-soakage material with the photocatalytic performance, not only can the selective soakage of the material surface to oil and water and the synergistic effect of photocatalysis be exerted to synchronously remove various mixed organic pollutants in the water, but also the defects of secondary pollution and difficult recovery of photocatalytic powder are overcome, and the super-soakage material has wide application prospect in the aspects of oil-containing wastewater treatment and water environment purification.
The invention aims at providing a TiO 2 -a preparation method of a PPy super-wetted photocatalytic composite material. The method prepares the TiO through simple hydrothermal synthesis and chemical vapor deposition process 2 -PPy super-wetted photocatalytic composite material. And the growth process is regulated and controlled by regulating and controlling the reaction, the reaction time and the reaction temperature. The composite material has high-efficiency full-spectrum photocatalytic performance and can have good separation effect on insoluble greasy dirt.
The titanium dioxide film generated on the sponge in situ has uniform thickness and forms a good composite interface with the vapor deposited conductive polymer, so that the composite material has more active sites, the synergistic effect of the titanium dioxide and the conductive polymer and the heterostructure endows the material with excellent full-spectrum photocatalytic performance, and the material is used for rapidly degrading water-soluble pollutants. In addition, the modified composite sponge has high surface energy and micro-nano coarse structure, so that the material has the performance of underwater super oleophobic, and can be used for continuously separating wastewater containing hydrophobic pollutants.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the method provides a simple two-step method, changes the type and concentration of the titanium dioxide precursor and the influence of hydrothermal synthesis conditions on the morphology of the titanium dioxide, and realizes TiO 2 Controllable preparation on the surface of melamine sponge. And depositing a thin-layer conductive polymer on the surface of the titanium dioxide-grown sponge by a chemical vapor deposition method, and regulating and controlling the photocatalysis performance and wettability of the titanium dioxide. The prepared titanium dioxide is tightly covered by the conductive polymer film, a heterojunction structure is formed at the interface of the titanium dioxide and the conductive polymer film, and the conductive polymer can be uniformly covered on the surface of the titanium dioxide photocatalyst by adopting a vapor deposition method, so that the composite material has higher mechanical stability and the catalytic performance of the composite material under the wavelength of full spectrum light is efficiently enhanced. The material has the characteristics of simple preparation, low cost and environmental friendliness.
Further, the method specifically comprises the following steps:
ethanol, titanium trichloride (TiCl 3 ) Aqueous solution and tin tetrachloride (SnCl) 4 ) Adding the ethanol solution into a polytetrafluoroethylene reaction kettle, uniformly mixing, adding melamine sponge, and reacting for a period of time under certain conditions. Drying the resultant, soaking in ferric chloride (FeCl) 3 ) Ethanol solution, oven drying, dripping conductive polymer as monomer, depositing under certain condition for a period of time, washing, and drying to obtain TiO 2 -PPy super-wetted photocatalytic composite material.
The invention is further improved in that the melamine sponge is commercial grade, washed with deionized water before use and air dried at room temperature.
The invention is further improved in that the concentration of the titanium trichloride aqueous solution is 10% -25%, and the dosage is 0.1-2 mL.
The invention is further improved in that the concentration of the tin tetrachloride aqueous solution is 0.01-1.5mol/L, and the dosage is 0.5-3 mL.
The invention is further improved in that the concentration of the ferric trichloride ethanol solution is 0.01-1 mol/L, and the dosage is 40-60 mL.
The invention is further improved in that the conductive polymer is pyrrole, the vapor deposition reaction time is 2-24h, and the deposition reaction temperature is 20-60 ℃.
The invention is further improved in that the solvent thermal reaction vessel is a polytetrafluoroethylene reaction kettle, the reaction temperature is 40-120 ℃, and the reaction time is 2-10h.
Compared with the prior art, the invention has the advantages that:
1) The titanium dioxide in-situ growth method is adopted, so that the titanium dioxide uniformly grows on the surface of the melamine sponge, and a layer of firm cladding titanium dioxide nano structure is formed.
2) The chemical vapor deposition method can be adopted to uniformly form a layer of film on the titanium dioxide film, so that the blocking of the porous structure by the polymer can be effectively inhibited, and a good bonding interface can be formed with the catalyst.
3) The preparation method of the titanium dioxide polymer composite material is simple, the condition is mild, the catalytic reaction can be carried out under full spectrum illumination, and the oil-water separation can be carried out, so that the titanium dioxide polymer composite material has a very high application prospect.
Drawings
FIG. 1 is a TiO prepared according to the invention 2 -SEM of PPy composite.
FIG. 2 is a TiO prepared according to the invention 2 -infrared spectrogram of PPy composite material.
FIG. 3 is a TiO prepared by the present invention 2 The PPy composite material has a photocatalytic degradation rate for 20mL of rhodamine B dye at a concentration of 20 mg/L.
Detailed Description
In order to make the description of the present invention easier to understand, the technical solution of the present invention will be further described with reference to the specific embodiments, but the present invention is not limited thereto.
Implementation example 1: 20mg of melamine sponge was added to a mixed solution of 30mL of ethanol, 1.5mL of titanium trichloride and 1mL of tin tetrachloride. Pouring the mixed solution into a 100mL polytetrafluoroethylene reaction kettle, and reversing at 100 DEG CShould be 6 hours. Taking out the reaction product, drying at 60 ℃, soaking in 0.05mol/L ferric trichloride solution for 20min, taking out, and drying at 40 ℃. Three drops of pyrrole monomer are dripped to the bottom of a deposition container, and then the precursor soaked with ferric trichloride is hung on the upper part of a reaction container for reaction for 5 hours at 40 ℃. And taking out the mixture after the reaction is finished, cleaning the mixture by using ethanol and deionized water, and drying the mixture. The black solid obtained is TiO 2 -PPy super-wetted photocatalytic composite material.
Implementation example 2: 15mg of melamine sponge was added to a mixed solution of 60mL of ethanol, 2mL of titanium trichloride and 1mL of tin tetrachloride. The mixed solution was poured into a 100mL polytetrafluoroethylene reaction vessel and reacted at 120℃for 8 hours. Taking out the reaction product, drying at 60 ℃, soaking in 0.2mol/L ferric trichloride solution for 20min, taking out, and drying at 40 ℃. Dropping four drops of pyrrole monomer to the bottom of the deposition container, hanging the precursor soaked with ferric trichloride on the upper part of the reaction container, and reacting for 6 hours at 40 ℃. And taking out the mixture after the reaction is finished, cleaning the mixture by using ethanol and deionized water, and drying the mixture. The black solid obtained is TiO 2 -PPy super-wetted photocatalytic composite material.
Implementation example 3: 20mg of melamine sponge was added to a mixed solution of 30mL of ethanol, 1.5mL of titanium trichloride and 1mL of tin tetrachloride. The mixed solution was poured into a 100mL polytetrafluoroethylene reaction vessel and reacted at 80℃for 5 hours. Taking out the reaction product, drying at 60 ℃, soaking in 0.1mol/L ferric trichloride solution for 10min, taking out, and drying at 40 ℃. And (3) dripping three drops of aniline monomer to the bottom of a deposition container, and hanging the precursor soaked with the ferric trichloride on the upper part of the reaction container for reaction for 24 hours at 60 ℃. And taking out the mixture after the reaction is finished, cleaning the mixture by using ethanol and deionized water, and drying the mixture. The black solid obtained is TiO 2 -PPy super-wetted photocatalytic composite material.
Referring to FIG. 1, tiO is prepared according to example 1 of the method of the present invention 2 SEM image of PPy super-wetted photocatalytic composite material. It can be seen from fig. 1 that titanium dioxide and polypyrrole are tightly covered on the sponge matrix.
Referring to FIG. 2, tiO is prepared according to example 1 of the method of the present invention 2 -infrared spectrogram of PPy super-wetted photocatalytic composite material. FIG. A shows red of pure titanium dioxideExternal spectrum, diagram B shows TiO 2 -infrared spectrum of PPy composite material. As can be seen from fig. 2: titanium dioxide and polypyrrole form a very good hybrid structure.
Referring to FIG. 3, a TiO is prepared according to example 1 of the method of the present invention 2 Photocatalytic degradation rate of PPy super-infiltrated photocatalytic composite material under full spectrum illumination in 20mL of rhodamine B dye at a concentration of 20 mg/L. As can be seen from fig. 3: tiO (titanium dioxide) 2 PPy shows high photocatalytic efficiency at higher concentrations, and the degradation rate after 120min can reach 92%.
Claims (2)
1. TiO (titanium dioxide) 2 The preparation method of the PPy super-infiltration photocatalytic composite material is characterized by comprising the following steps of:
uniformly mixing 0.1-2 mL percent of titanium trichloride aqueous solution with the concentration of 10-25 percent, 0.5-3 mL percent of tin tetrachloride aqueous solution with the concentration of 0.01-1.5mol/L and a solvent, adding melamine sponge, performing solvothermal reaction, reacting at the temperature of 40-120 ℃ for 2-10h, and drying to obtain melamine sponge uniformly loaded with titanium dioxide; the solvent is ethanol;
soaking melamine sponge loaded with titanium dioxide in an ethanol solution of ferric trichloride with the concentration of 0.01-1 mol/L of 40-60 mL, fully soaking and drying to obtain a precursor;
and adding pyrrole monomer into the bottom of a deposition container, suspending the precursor at the upper part of the deposition container, reacting for 2-24h at 20-60 ℃, and forming a polypyrrole film on the surface of the precursor by a chemical vapor deposition method.
2. The material prepared by the method of claim 1.
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| CN111437886A (en) * | 2020-03-20 | 2020-07-24 | 西安工程大学 | Melamine sponge/TiO2Composite material and preparation method thereof |
| CN111744371A (en) * | 2020-06-23 | 2020-10-09 | 西南石油大学 | Self-cleaning graphene oxide nanofiltration membrane and preparation method thereof |
| CN115228470A (en) * | 2022-07-01 | 2022-10-25 | 重庆工商大学 | Preparation method of super-hydrophobic super-oleophylic carbonyl iron loaded nano titanium dioxide photocatalyst |
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