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Z-type Bi2WO6-x/ZnIn2S4 composite photocatalyst, preparation method and application thereof

A composite light and catalyst technology, applied in the field of photocatalysis, can solve the problem of low catalytic activity of a single catalyst, and achieve the effects of improving photocatalytic activity, enhancing absorption and rapid separation

Pending Publication Date: 2021-12-21
广西北投环保水务集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Sov is also easy to become the recombination center of electron holes, thus inhibiting the transfer of electrons at the heterojunction interface.
Therefore, it is necessary to propose a more efficient electron transfer strategy at the heterojunction interface to improve the shortcomings of single catalysts with low catalytic activity.

Method used

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  • Z-type Bi2WO6-x/ZnIn2S4 composite photocatalyst, preparation method and application thereof
  • Z-type Bi2WO6-x/ZnIn2S4 composite photocatalyst, preparation method and application thereof
  • Z-type Bi2WO6-x/ZnIn2S4 composite photocatalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Bi 2 WO 6-x Preparation of: Add 80mL deionized water into the beaker, then add 485mg Bi(NO 3 ) 3 ·5H 2 O, and magnetically stirred for 20min, then added 165mg Na 2 WO 4 2H 2 O, maintain magnetic stirring for another 10 minutes, centrifuge the precipitate that appears until the pH is neutral, transfer the precipitate to 35 mL of deionized water, and then keep the reaction at 160°C for 18 hours, cool the resulting product to room temperature, and wash with deionized water Washing, and then drying at 60 °C for 12 h, to obtain Bi 2 WO 6-x Nanosheets, labeled Vo-BWO;

[0038] (2) Bi 2 WO 6-x / ZnIn 2 S 4 Preparation: get 25mg of Bi prepared in step (1) 2 WO 6-x , dispersed into 15mL N,N dimethylformamide solution, adding 136mg ZnCl 2 , ultrasonically dispersed for 10min, then added 586mg InCl 3 4H 2 O, continue to sonicate for 10 minutes, then add 301 mg of thioacetamide, continue to sonicate for 5 minutes, add 3 mL of glycerin to the above mixed solution...

Embodiment 2

[0040] The difference between embodiment 2 and embodiment 1 is that, in embodiment 2 step (2), Bi 2 WO 6-x The amount is 50mg, and other conditions are identical with embodiment 1. Bi prepared by the present embodiment 2 2 WO 6-x / ZnIn 2 S 4 Nanosheets, labeled 50Vo-BWO / ZIS.

Embodiment 3

[0042] The difference between embodiment 3 and embodiment 1 is that, in embodiment 3 step (2), Bi 2 WO 6-x The amount is 75mg, and other conditions are identical with embodiment 1. Bi prepared by the present embodiment 3 2 WO 6-x / ZnIn 2 S 4 Nanosheets, labeled 75Vo-BWO / ZIS.

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Abstract

The invention discloses a Z-type Bi2WO6-x / ZnIn2S4 composite photocatalyst, a preparation method and application thereof, and belongs to the technical field of photocatalysis. The preparation method comprises the following steps: preparing vacancy-containing Bi2WO6-x by adopting a step-by-step synthesis method, growing a ZnIn2S4 nanosheet on the Bi2WO6-x nanosheet in situ, and preparing an S<2->-bonded Z-type Bi2WO6-x / ZnIn2S4 composite photocatalyst according to the fact that the surface of the Bi2WO6 with vacancy defects is easy to realize functionalization. According to the invention, the Bi2WO6-x / ZnIn2S4 composite photocatalyst is high in activity and stability, has good degradation efficiency on pollutants tetracycline hydrochloride and methyl orange under visible light illumination, is good in repeatability, can be recycled multiple times, and has wide application prospects in the aspects of solving water environment pollution, producing hydrogen through photocatalytic decomposition of water and the like; and the preparation method is simple, mild in reaction condition and low in cost, and the synthesized Bi2WO6-x / ZnIn2S4 composite photocatalyst is relatively high in yield and purity and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a Z-type Bi 2 WO 6-x / ZnIn 2 S 4 Composite photocatalyst and its preparation method and application. Background technique [0002] The problem of water pollution leads to continuous environmental degradation, which seriously threatens the ecological environment, aquatic organisms and human health. The main causes of water pollution include harmful organic dyes and antibiotics produced by industry. Tetracycline hydrochloride is one of the main components of wastewater from pharmaceutical factories. It usually has good chemical stability. However, excessive concentration of tetracycline hydrochloride in water will cause a series of environmental problems, such as the formation of drug-resistant microorganisms and the destruction of ecological balance. Methyl orange is a representative of water-soluble organic anionic dyes. It has poor biochemical properties, has potenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J23/31B01J37/10C02F1/30C02F101/38C02F101/34C02F101/36
CPCB01J27/04B01J23/31B01J23/002B01J37/10C02F1/30C02F2305/10C02F2101/38C02F2101/34C02F2101/36C02F2101/308B01J35/23B01J35/39
Inventor 蒋严波冉琪韦纯忠韦愿袁永晴黄纤晴
Owner 广西北投环保水务集团有限公司