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Composite cadmium sulfide heterojunction photocatalyst preparation method

A photocatalyst and heterojunction technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of poor adsorption performance, photochemical instability, limited photocatalytic activity of pure CdS, etc. To achieve the effect of promoting visible light catalytic reaction, easy to implement, and shape controllable

Inactive Publication Date: 2019-12-31
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

However, the photocatalytic activity of pure CdS is limited due

Method used

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  • Composite cadmium sulfide heterojunction photocatalyst preparation method

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Embodiment 1

[0018] (1) Preparation of CdS by solvothermal method. First, under ultrasonic treatment, thiourea and CdCl 2 Disperse in 10 mL of ethylenediamine, respectively, and continue sonication. The mixture was transferred to a 100 mL Teflon autoclave, sealed and kept at 160 °C for 48 h. After natural cooling to room temperature, the solid product was manually collected and thoroughly washed by centrifugation with deionized water and dried at 60 °C for 12 hours to obtain CdS nanorods.

[0019] (2) Ag:ZnIn 2 S 4 / CdS heterojunction photocatalyst synthesis. Disperse 200 mg of CdS in 50 mL of deionized water under ultrasonic conditions, then add 282 μL of 0.05 mmol / mL zinc acetate solution, 282 μL of 0.1 mmol / mL indium acetate solution, 104 μL of 0.8 mmol / L silver nitrate solution, and 170 μL of 0.01 mmol / mL L-cysteine ​​and sonicate 10mim. The mixture was transferred to a 100 mL Teflon reaction kettle, and 568 μL of 0.01 mmol / mL thioacetamide solution was added and magnetically sti...

Embodiment 2

[0021] As described in Example 1, the difference is that 564 μL of 0.05 mmol / mL zinc acetate solution, 564 μL of 0.1 mmol / mL indium acetate solution, 208 μL of 0.8 mmol / L silver nitrate solution, and 340 μL of 0.01 mmol / mL L-cysteine, 1136 μL 0.01 mmol / mL thioacetamide solution, the final catalyst contains 2 wt% Ag:ZnIn 2 S 4 2 wt% of Ag:ZnIn 2 S 4 / CdS.

Embodiment 3

[0023] As described in Example 1, the difference is that 846 μL of 0.05 mmol / mL zinc acetate solution, 846 μL of 0.1 mmol / mL indium acetate solution, 312 μL of 0.8 mmol / L silver nitrate solution, and 510 μL of 0.01 mmol / mL L-cysteine, 1704 μL 0.01 mmol / mL thioacetamide solution, the final catalyst contains 3 wt% Ag:ZnIn 2 S 4 3 wt% of Ag:ZnIn 2 S 4 / CdS.

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Abstract

The invention discloses a composite cadmium sulfide heterojunction photocatalyst preparation method, relates to a catalyst preparation method, and provides a preparation method of a novel silver ion doped zinc thioindate composite cadmium sulfide (Ag:ZnIn2S4/CdS) heterojunction photocatalyst for enhancing the photocatalytic activity of visible light, wherein silver nitrate, zinc acetate, indium acetate, thioacetamide and cadmium sulfide are subjected to a reaction according to a certain ratio under a hydrothermal condition to obtain the target photocatalyst. According to the invention, the novel visible light photocatalyst is clear in structure and definite in composition; by doping with Ag<+>, the photon utilization rate of ZnIn2S4 can be obviously enhanced; after compounding with CdS, the diffusion range of photon-generated carriers can be enlarged, and the recombination of photon-generated electron-hole pairs is inhibited, so that the catalytic activity of visible light is enhanced;the Ag:ZnIn2S4/CdS composite material has wide prospect in the field of clean energy production and energy conversion based on high visible light activity and good hydrogen production capacity; and the obtained catalyst has broad application prospect.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a composite cadmium sulfide heterojunction photocatalyst. Background technique [0002] Hydrogen energy, as an environmentally friendly, clean and pollution-free new energy source, can be prepared by photocatalytic water splitting. Photocatalysis is considered to be an ideal technology for environmental treatment and energy regeneration because it can be driven by solar energy and the reaction can be carried out at normal temperature and pressure. In order to achieve efficient water splitting to generate hydrogen, a large number of semiconductor photocatalysts for hydrogen production have been developed. In previous studies, TiO 2 Photocatalysts have attracted the attention of environmental and energy researchers worldwide. TiO 2 Is a wide bandgap semiconductor, its response range is only in the ultraviolet region, and ultraviolet light accounts for ...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/04
CPCB01J35/004B01J27/04C01B3/042C01B2203/0277C01B2203/1076Y02E60/36
Inventor 高雨徐振和任晓东徐宝彤樊苗苗丁茯孙亚光
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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