Silver ion doped zinc thioindate heterojunction photocatalyst preparation method

A zinc thioindium acid and photocatalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve problems such as poor absorption effect and unsatisfactory photoresponse range, and achieve surface area increase and promote Visible light catalyzed reaction, the effect of improving the utilization rate

Inactive Publication Date: 2019-12-31
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its wide forbidden band width and large forbidden band energy, the absorption effect in the visible light range is poor, and the photoresponse range is not ideal, and there is still a certain distance from the use efficiency of visible light.

Method used

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  • Silver ion doped zinc thioindate heterojunction photocatalyst preparation method
  • Silver ion doped zinc thioindate heterojunction photocatalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Prepare In-MIL-68 by solvothermal method. First, under magnetic stirring treatment, terephthalic acid and In(NO 3 ) 3 ·xH 2 O was separately dispersed in 100 mL of DMF, and magnetic stirring was continued. After all the reaction substances were dissolved in DMF, the mixture was transferred to a 150 mL round bottom flask and placed in an oil bath at 100°C for 12 min. After natural cooling to room temperature, the solid product was collected manually and centrifuged by ethanol, washed thoroughly and dried at 60 °C for 12 hours to obtain In-MIL-68.

[0023] (2) Take out 90mg of In-MIL-68 and put it into a crucible, wrap it with aluminum foil and put it into a tube furnace. The temperature is raised to 500°C for annealing. The heating rate is 1°C / min and the temperature is kept at 500°C for 2h. After natural cooling to room temperature, light yellow In 2 o 3 hollow tube.

[0024] (3) Ag:ZnIn 2 S 4 / In 2 o 3 Synthesis of heterojunction photocatalysts. Under t...

Embodiment 2

[0026] As described in Example 1, the difference is that 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, 568μL 0.01 mmol / mL thioacetamide solution, the final catalyst is 2wt% Ag:ZnIn 2 S 4 / In 2 o 3 .

Embodiment 3

[0028] As described in Example 1, the difference is that 423 μL of 0.05 mmol / mL zinc acetate solution, 423 μL of 0.1 mmol / mL indium acetate solution, 216 μL of 0.8 mmol / L silver nitrate solution, and 255 μL of 0.01 mmol / mL L-cysteine, 852μL 0.01 mmol / mL thioacetamide solution, the final catalyst is 3wt% Ag:ZnIn 2 S 4 / In 2 o 3 .

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Abstract

The invention discloses a silver ion doped zinc thioindate heterojunction photocatalyst preparation method, and relates to a catalyst preparation method, which comprises: carrying out a reaction on silver nitrate, zinc acetate, indium acetate, thioacetamide and indium oxide according to a certain ratio under an oil bath heating condition to obtain a 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 remarkably increased; by compounding withIn2O3, the diffusion range of photon-generated carriers can be enlarged, the electron-hole pair is effectively separated, the recombination of photo-induced electron-hole pairs is inhibited, and theutilization rate of photo-induced electrons is greatly increased, so that the catalytic activity of visible light is enhanced; and the Ag:ZnIn2S4/In2O3 composite material has high visible light activity, good hydrogen production capacity and good photocatalytic stability, so that the Ag:ZnIn2S4/In2O3 composite material has wide prospect in the field of clean energy production and energy conversion, and is a catalyst with good development prospect.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a silver ion-doped zinc thioindate heterojunction photocatalyst. Background technique [0002] Photocatalytic technology can complete many chemical reactions under relatively mild reaction conditions, which can only be completed under harsh artificial setting conditions. Therefore, this technology has advantages and bright application prospects that ordinary technologies do not have. Photocatalysis is considered to be an ideal environmental treatment and energy regeneration technology, because solar energy can be used as one of the driving energy participating in the reaction, and solar energy is a clean and renewable energy, and the driving process is generated without pollution. At the same time, hydrogen energy, as one of the ideal new energy sources that are environmentally friendly, clean and pollution-free, can be produced by photocatalytic water s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCB01J35/004B01J27/04C01B3/042C01B2203/0277C01B2203/1076Y02E60/36
Inventor 高雨徐振和礼峥樊苗苗丁茯孙亚光
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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