CN110624566B - CuInS2Preparation method and application of quantum dot/NiAl-LDH composite photocatalyst - Google Patents
CuInS2Preparation method and application of quantum dot/NiAl-LDH composite photocatalyst Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 claims description 39
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- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 17
- XUJNEKJLAYXESH-REOHCLBHSA-N L-Cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 16
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 15
- MPTQRFCYZCXJFQ-UHFFFAOYSA-L copper(II) chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Cu+2] MPTQRFCYZCXJFQ-UHFFFAOYSA-L 0.000 claims description 13
- AOPCKOPZYFFEDA-UHFFFAOYSA-N nickel(2+);dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O AOPCKOPZYFFEDA-UHFFFAOYSA-N 0.000 claims description 13
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- PSCMQHVBLHHWTO-UHFFFAOYSA-K indium(iii) chloride Chemical compound Cl[In](Cl)Cl PSCMQHVBLHHWTO-UHFFFAOYSA-K 0.000 claims description 8
- 238000003760 magnetic stirring Methods 0.000 claims description 8
- 230000035484 reaction time Effects 0.000 claims description 2
- 229910000943 NiAl Inorganic materials 0.000 claims 3
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims 3
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims 2
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- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 4
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- VGVRPFIJEJYOFN-UHFFFAOYSA-N 2,3,4,6-tetrachlorophenol Chemical class OC1=C(Cl)C=C(Cl)C(Cl)=C1Cl VGVRPFIJEJYOFN-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- PWKSKIMOESPYIA-UHFFFAOYSA-N 2-acetamido-3-sulfanylpropanoic acid Chemical compound CC(=O)NC(CS)C(O)=O PWKSKIMOESPYIA-UHFFFAOYSA-N 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- APHGZSBLRQFRCA-UHFFFAOYSA-M indium(1+);chloride Chemical compound [In]Cl APHGZSBLRQFRCA-UHFFFAOYSA-M 0.000 description 1
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
- B01J27/043—Sulfides with iron group metals or platinum group metals
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- B01J35/39—Photocatalytic properties
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- 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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- C02F1/00—Treatment of water, waste water, or sewage
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Abstract
本发明属于环境材料制备技术领域，具体涉及一种CuInS2量子点/NiAl‑LDH复合光催化剂的制备方法及其应用。本发明将CuInS2量子点与NiAl‑LDH负载形成CuInS2量子点/NiAl‑LDH异质结，使得电子的复合效率大大降低，极大增强催化剂光响应能力，相比单纯的NiAl‑LDH光催化剂具有更为优越的光催化活性。制备的CuInS2量子点/NiAl‑LDH光催化剂可以高效降解2,4‑二氯苯酚废水，不会造成资源浪费与附加污染的形成，且操作简便，是一种绿色环保的高效处理技术。The invention belongs to the technical field of environmental material preparation, and in particular relates to a preparation method and application of a CuInS 2 quantum dot/NiAl-LDH composite photocatalyst. In the present invention, CuInS 2 quantum dots and NiAl-LDH are supported to form CuInS 2 quantum dots/NiAl-LDH heterojunction, so that the recombination efficiency of electrons is greatly reduced, and the photoresponse capability of the catalyst is greatly enhanced. Compared with the pure NiAl-LDH photocatalyst It has more superior photocatalytic activity. The prepared CuInS 2 quantum dots/NiAl-LDH photocatalyst can efficiently degrade 2,4-dichlorophenol wastewater, does not cause waste of resources and the formation of additional pollution, and is easy to operate, which is a green and environmentally friendly high-efficiency treatment technology.
Description
Technical Field
The invention belongs to the technical field of preparation of environmental materials, and relates to CuInS2A preparation method and application of a quantum dot/NiAl-LDH composite photocatalyst.
Background
Phenols and compounds thereof are widely used in wood preservatives, insecticides, herbicides and the like. The use of a large amount of chlorophenols can cause environmental pollution, and a large amount of residues are left in media such as water, soil and the like through a water circulation system, and the chlorophenols have potential influence on human bodies. Taking 2, 4-dichlorophenol as an example, 2, 4-dichlorophenol has the characteristics of strong stability, volatility and irritation, has great influence on the environment, and even endangers human life. Therefore, how to effectively remove the residual 2, 4-dichlorophenol in the environment is a great problem which needs to be solved urgently by researchers. The existing 2, 4-dichlorophenol processing method mainly comprises the following steps: electrolytic process, activated carbon adsorption process, microbiological process and photocatalytic oxidation process. The photocatalysis technology is an efficient, green, energy-saving and environment-friendly pollution control technology, has the characteristics of broad spectrum, strong oxidizability, high efficiency and the like, and is widely concerned by researchers.
NiAl-LDH is a novel photocatalyst, has a special crystal structure and an electronic structure, is widely concerned, and has high stability. Currently, the research of NiAl-LDH in the field of photocatalysis has not formed a system, but partial researchers have started to research the modification of NiAl-LDH. CuInS2The quantum dot has unique optical performance, is a transition metastable state substance between a macroscopic substance and a microscopic atomic molecule, and shows a plurality of unique properties such as surface effect, small-size effect, quantum size effect, macroscopic quantum tunneling effect and the like. However, CuInS is not known yet2And (3) research reports of the composite material related to the NiAl-LDH by the quantum dots.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides CuInS2The invention discloses a quantum dot/NiAl-LDH composite photocatalyst and a preparation method and application thereof2The quantum dot photocatalyst is compounded with the NiAl-LDH photocatalyst to form a zero-dimensional two-dimensional composite photocatalyst with larger specific surface area. Prepared CuInS2The quantum dot/NiAl-LDH composite photocatalyst can effectively treat phenols in wastewater, and particularly has an excellent degradation effect on 2, 4-dichlorophenol.
In order to achieve the above purpose, the invention adopts the technical scheme that:
the invention provides CuInS2The preparation method of the quantum dot/NiAl-LDH composite photocatalyst comprises the following steps:
（1）CuInS2preparation of quantum dot photocatalyst
Dissolving copper chloride dihydrate in ethylenediamine, and adding indium chlorideAdding a certain amount of L-cysteine, adding deionized water, performing magnetic stirring for auxiliary reaction, placing the mixture into a high-pressure reaction kettle, heating for reaction, naturally cooling after the reaction, centrifuging, washing ionized water and ethanol for several times respectively, and drying to obtain CuInS2A quantum dot photocatalyst;
(2) preparation of NiAl-LDH photocatalyst
Adding nickel nitrate hexahydrate and aluminum nitrate into deionized water to be completely dissolved, adding a certain amount of urotropine, carrying out magnetic stirring to assist reaction, putting the mixture into a high-pressure reaction kettle to carry out heating reaction, naturally cooling and centrifuging after reaction, washing the deionized water and ethanol for several times respectively, and drying to obtain a NiAl-LDH photocatalyst;
（3）CuInS2the preparation method of the quantum dot/NiAl-LDH composite photocatalyst comprises the following steps:
the CuInS prepared in the step (1) is added2Adding the quantum dot photocatalyst and the NiAl-LDH photocatalyst prepared in the step (2) into a certain amount of N, N-dimethylformamide for fully stirring, putting the mixture into a high-pressure reaction kettle for heating reaction, then naturally cooling, centrifuging, respectively washing with deionized water and absolute ethyl alcohol for a plurality of times, and then drying to obtain CuInS2A quantum dot/NiAl-LDH composite photocatalyst is provided.
In the step (1), the molar ratio of the copper chloride dihydrate to the indium chloride to the L-cysteine is 1: 1: 2.
In the step (1), the dosage ratio of the copper chloride dihydrate to the ethylenediamine is 0.001mol:20 ml.
In the step (1), the volume ratio of the ethylenediamine to the deionized water is 1: 1.
In the step (2), the molar ratio of the nickel nitrate hexahydrate, the aluminum nitrate and the urotropine is 64: 58: 175.
In the step (3), the dosage ratio of the N, N-dimethylformamide to the NiAl-LDH is 20ml: 0.08 g.
The heating reaction temperature is 150-180 ℃, and the reaction time is 4-7 h.
In step (3), CuInS2The mass ratio of the quantum dots to the NiAl-LDH is 0.008-0.032: 0.08.
The invention provides aCuInS prepared according to the preparation method2The quantum dot/NiAl-LDH composite photocatalyst is CuInS2CuInS in quantum dot/NiAl-LDH composite photocatalyst2Quantum dots are uniformly distributed on the surface of the NiAl-LDH sheet to form a nested n-n type heterojunction, CuInS2The mass ratio of the quantum dots to the NiAl-LDH is 0.008-0.032: 0.08, and the degradation rate of the composite photocatalyst to 2, 4-dichlorophenol reaches 71.4% -84.5% within 100 min.
The invention also provides CuInS2The application of the quantum dot/NiAl-LDH composite photocatalyst is to remove 2, 4-dichlorophenol in wastewater.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides CuInS2A preparation method of a quantum dot/NiAl-LDH composite photocatalyst, which is prepared by mixing CuInS2Quantum dot and NiAl-LDH load form CuInS2The composite photocatalyst prepared by the method has greatly reduced electron recombination efficiency, greatly enhanced photoresponse capability, better photocatalytic activity compared with a pure NiAl-LDH photocatalyst, better photo-generated carrier separation efficiency and higher visible light utilization rate. The problems that the nested n-n type heterojunction in the prior art cannot form effective separation of photon-generated carriers due to the action of a built-in electric field and has poor photocatalysis effect are solved. The CuInS takes a semiconductor material as a photocatalyst and visible light as excitation, realizes a special catalysis or conversion effect through the interface interaction with pollutant molecules, enables surrounding oxygen and water molecules to be excited into substances with strong oxidizing property such as oxygen free radicals and hydroxyl free radicals with strong oxidizing property, and further achieves the purpose of degrading harmful organic substances in the environment2The quantum dot/NiAl-LDH photocatalyst can efficiently degrade 2, 4-dichlorophenol wastewater, and the degradation rate of 2, 4-dichlorophenol tested in the embodiment of the invention reaches 71.4% -84.5% within 100 min. The preparation method of the invention does not cause resource waste and additional pollution, is simple and convenient to operate, and is an environment-friendly high-efficiency treatment technology.
Drawings
FIG. 1 is CuInS2An XRD pattern of the quantum dot/NiAl-LDH composite photocatalyst.
FIG. 2 is CuInS2And (3) SEM images of the quantum dot/NiAl-LDH composite photocatalyst.
FIG. 3 is CuInS2And (3) a UV-vis diagram of the quantum dot/NiAl-LDH composite photocatalyst.
Detailed Description
In order to further understand the present invention, the following further describes the present invention with reference to specific embodiments, and the technical solutions in the embodiments of the present invention are clearly and completely described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise specified, the reagents involved in the examples of the present invention are all commercially available products, and all of them are commercially available.
Nickel nitrate hexahydrate (Ni (NO) used in the invention3)2·6H2O), aluminum nitrate (Al (NO)3)2·9H2O), urotropin (C)6H12N4) L-cysteine (C)3H7NO2S), ethylenediamine (C)2H8N2) N, N-dimethylformamide (C)3H7NO), 2, 4-dichlorophenol (C)6H4Cl2O) are all analytically pure and purchased from national pharmaceutical chemical reagent company Limited; indium chloride (InCl)3) And purchased from Shanghai Michelin Biochemical technology, Inc.
Photocatalytic activity evaluation of the photocatalyst prepared in the present invention: irradiating with visible light lamp in DW-01 type photochemical reactor (from science and technology Co., Ltd., Yangzhou university city), adding 100mL2, 4-dichlorophenol simulated wastewater into the reactor, measuring its initial value, adding the prepared photocatalyst, magnetically stirring, starting an aeration device, introducing air to keep the catalyst in suspension or floating stateSampling and analyzing at 20min interval during the illumination process, centrifuging, collecting supernatant, and placing in spectrophotometer lambdamax Absorbance at = 286 nm and is determined by the formula: ƞ = [ (1-C)t/C0)]x100% to calculate the degradation rate, where C0Absorbance of 2, 4-dichlorophenol solution to reach adsorption equilibrium, CtAbsorbance of 2, 4-dichlorophenol solution measured for sampling at regular time.
Example 1:
（1）CuInS2preparation of quantum dot photocatalyst
Putting 0.17g of copper chloride dihydrate and 20mL of ethylenediamine into a small beaker, adding 0.22g of indium chloride and 0.24g L-cysteine after all the copper chloride dihydrate and the ethylenediamine are dissolved, and adding 20mL of deionized water, magnetically stirring and carrying out an auxiliary reaction for 30 min; pouring into a high-pressure reaction kettle, heating for 7h at 150 ℃ by using a blast drying oven, taking out, naturally cooling, centrifuging, washing with deionized water and ethanol for 3 times respectively, and drying in the blast drying oven to obtain CuInS2A quantum dot photocatalyst.
(2) Preparation of NiAl-LDH photocatalyst
Weighing 1.875g of nickel nitrate hexahydrate and 2.181g of aluminum nitrate, putting the nickel nitrate hexahydrate and the aluminum nitrate into a small beaker, adding deionized water, adding 2.453g of urotropine after the nickel nitrate and the aluminum nitrate are completely dissolved, carrying out magnetic stirring for assisting reaction for 1h, pouring the mixture into a high-pressure reaction kettle, heating the mixture for 7h at the temperature of 150 ℃, taking out the mixture, naturally cooling the mixture, centrifuging the mixture, washing the mixture for 3 times respectively by using the deionized water and ethanol, and putting the mixture into a blast drying oven for drying to obtain the NiAl-LDH photocatalyst.
（3）CuInS2Preparation of quantum dot/NiAl-LDH composite photocatalyst
0.008g of CuInS2Putting quantum dots and 0.08g of NiAl-LDH into a small beaker, adding 20ml of N, N-dimethylformamide, fully stirring for 1h, then pouring the mixture into a high-pressure reaction kettle, heating the mixture for 7h in an air drying oven at 150 ℃, taking out the mixture, naturally cooling the mixture, centrifuging the mixture, washing the mixture, and putting the washed mixture into an oven to dry the mixture to obtain CuInS2A quantum dot/NiAl-LDH composite photocatalyst is provided.
The CuInS prepared in this example was used2Putting the quantum dot/NiAl-LDH composite photocatalyst in a photochemical reactor for a photocatalytic degradation test, and determining the prepared CuInS2The degradation rate of the quantum dot/NiAl-LDH composite photocatalyst to 2, 4-dichlorophenol reaches 73.6 percent within 100 min.
Example 2:
（1）CuInS2preparation of quantum dot photocatalyst
Putting 0.17g of copper chloride dihydrate and 20mL of ethylenediamine into a small beaker, adding 0.22g of indium chloride and 0.24g L-cysteine after the copper chloride dihydrate and the ethylenediamine are completely dissolved, adding 20mL of deionized water, magnetically stirring to assist reaction for 30min, pouring into a high-pressure reaction kettle, heating for 5h at 160 ℃ by using an air-blowing drying oven, taking out, naturally cooling, centrifuging the solution, washing the deionized water and ethanol for 3 times respectively, putting into the air-blowing drying oven, and drying to obtain the CuInS2A quantum dot photocatalyst.
(2) Preparation of NiAl-LDH photocatalyst
Weighing 1.875g of nickel nitrate hexahydrate and 2.181g of aluminum nitrate, putting the nickel nitrate hexahydrate and the aluminum nitrate into a small beaker, adding deionized water, adding 2.453g of urotropine after the nickel nitrate and the aluminum nitrate are completely dissolved, carrying out magnetic stirring for assisting reaction for 1h, pouring the mixture into a high-pressure reaction kettle, heating the mixture for 5h at 160 ℃ in a forced air drying oven, taking out the mixture, naturally cooling the mixture, centrifuging the mixture, washing the mixture for 3 times respectively by using the deionized water and ethanol, and putting the mixture into the forced air drying oven for drying to obtain the NiAl-LDH photocatalyst.
(3) CuInS2Preparation of quantum dot/NiAl-LDH composite photocatalyst
0.015g of CuInS is weighed2Putting 0.08g of prepared NiAl-LDH into a small beaker, adding 20ml of N, N-dimethylformamide, fully stirring for 1h, then pouring the mixture into a high-pressure reaction kettle, heating the mixture for 5h at 160 ℃ in an air drying oven, taking out the mixture for natural cooling, centrifuging the cooled solution, washing and putting the solution into an oven for drying to obtain CuInS2A quantum dot/NiAl-LDH composite photocatalyst is provided.
The CuInS prepared in this example was used2The quantum dot/NiAl-LDH composite photocatalyst is put in a photochemical reactor for a photocatalytic degradation test, and the degradation rate of the photocatalyst to 2, 4-dichlorophenol is measured to reach 84.5 percent within 100min, and the degradation effect is about 4.5 times of that of pure NiAl-LDH. FIG. 1 shows CuInS prepared in this example2An XRD (X-ray diffraction) pattern of the quantum dot/NiAl-LDH composite photocatalyst is clearly shown in figure 1, and CuInS is clearly shown in figure 12Quantum dots, NiAl-LDH, CuInS2The characteristic peak and peak intensity of the quantum dot/NiAl-LDH composite photocatalyst are high, and the crystallinity and purity of the synthesized photocatalyst are proved to be good.
FIG. 2 shows CuInS prepared in this example2SEM picture of quantum dot/NiAl-LDH composite photocatalyst, and CuInS can be seen from figure 22The quantum dots are uniformly distributed on the surface of the NiAl-LDH sheet to relieve the CuInS2The problem of quantum dot agglomeration and good interface contact enable electric charges to smoothly migrate in space, and the photocatalytic activity can be effectively promoted.
FIG. 3 shows CuInS prepared in this example2A UV-vis diagram of the quantum dot/NiAl-LDH composite photocatalyst; the CuInS produced can be seen in FIG. 32The photo-response capability of the quantum dot/NiAl-LDH composite photocatalyst is greatly enhanced compared with that of pure NiAl-LDH, the absorption capability of the photocatalyst to visible light is improved, and the light utilization rate is crucial to the practical application of the photocatalyst in natural environment.
Example 3:
（1）CuInS2preparation of quantum dot photocatalyst
0.17g of copper chloride dihydrate and 20mL of ethylenediamine are put into a small beaker, 0.22g of indium chloride and 0.24g L-cysteine are added after all the copper chloride dihydrate and the ethylenediamine are dissolved, and 20mL of deionized water is weighed out and stirred magnetically to assist the reaction for 50 min. Pouring into a high-pressure reaction kettle, heating for 4h at 180 ℃ by using a blast drying oven, taking out, naturally cooling, centrifuging the solution, washing with deionized water and ethanol for 3 times respectively, and drying in the blast drying oven to obtain CuInS2A quantum dot photocatalyst.
(2) Preparation of NiAl-LDH photocatalyst
Weighing 1.875g of nickel nitrate hexahydrate and 2.181g of aluminum nitrate, putting the nickel nitrate hexahydrate and the aluminum nitrate into a small beaker, adding deionized water, adding 2.453g of urotropine after the nickel nitrate and the aluminum nitrate are completely dissolved, carrying out magnetic stirring for assisting reaction for 1h, pouring the mixture into a high-pressure reaction kettle, heating the mixture for 4h at 180 ℃ by using a forced air drying oven, taking out the mixture for natural cooling, centrifuging the solution, washing the solution for 3 times by using the deionized water and ethanol respectively, and putting the washed solution into the forced air drying oven for drying to obtain the NiAl-LDH photocatalyst.
(3) CuInS2The preparation method of the quantum dot/NiAl-LDH composite photocatalyst comprises the following steps:
0.02g of CuInS2Putting quantum dots and 0.08g of NiAl-LDH into a small beaker, adding 20ml of N, N-dimethylformamide, fully stirring for 1h, then pouring the mixture into a high-pressure reaction kettle, heating the mixture for 4h at 180 ℃ in an air drying oven, taking out the mixture for natural cooling, centrifuging the cooled solution, washing and putting the solution into the oven for drying to obtain CuInS2A quantum dot/NiAl-LDH composite photocatalyst is provided.
The CuInS prepared in this example was used2The quantum dot/NiAl-LDH composite photocatalyst is put in a photochemical reactor for a photocatalytic degradation test, and the degradation rate of the photocatalyst to 2, 4-dichlorophenol is measured to reach 75.6 percent within 100 min.
Example 4:
（1）CuInS2preparation of quantum dot photocatalyst
Putting 0.17g of copper chloride dihydrate and 20mL of ethylenediamine into a small beaker, adding 0.22g of indium chloride and 0.24g L-cysteine after the copper chloride dihydrate and the ethylenediamine are completely dissolved, and adding 20mL of deionized water, magnetically stirring and carrying out an auxiliary reaction for 30 min; pouring into a high-pressure reaction kettle, heating for 6h at 160 ℃ by using a blast drying oven, taking out, naturally cooling, centrifuging, washing with deionized water and ethanol for 3 times respectively, and drying in the blast drying oven to obtain CuInS2A quantum dot photocatalyst.
(2) Preparation of NiAl-LDH photocatalyst
Weighing 1.875g of nickel nitrate hexahydrate and 2.181g of aluminum nitrate, putting the nickel nitrate hexahydrate and the aluminum nitrate into a small beaker, adding deionized water, adding 2.453g of urotropine after the nickel nitrate and the aluminum nitrate are completely dissolved, carrying out magnetic stirring for assisting reaction for 1h, pouring the mixture into a high-pressure reaction kettle, heating the mixture for 6h at 160 ℃ in an air-blast drying oven, taking out the mixture, naturally cooling the mixture, centrifuging the mixture, washing the mixture for 3 times respectively by using the deionized water and ethanol, and putting the mixture into the air-blast drying oven for drying to obtain the NiAl-LDH photocatalyst.
(3) CuInS2Preparation of quantum dot/NiAl-LDH composite photocatalyst
0.032g of CuInS2Putting the quantum dots and 0.08g of NiAl-LDH into a small beaker, adding 20ml of N, N-dimethylformamide, fully stirring for 1h, then pouring the mixture into a high-pressure reaction kettle, heating for 6h at 160 ℃ in an air drying oven,taking out, naturally cooling, centrifuging, washing and drying in an oven to obtain CuInS2A quantum dot/NiAl-LDH composite photocatalyst is provided.
The CuInS prepared in this example was used2The quantum dot/NiAl-LDH composite photocatalyst is put in a photochemical reactor for a photocatalytic degradation test, and the degradation rate of the photocatalyst to 2, 4-dichlorophenol is measured to reach 71.4 percent within 100 min.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
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