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WS2/ZnIn2S4 composite visible light catalyst and preparation method thereof

A znin2s4, visible light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of high photogenerated electron-hole recombination rate, achieve good photocatalytic hydrogen production activity, preparation method Simple, good photocatalytic performance effect

Inactive Publication Date: 2018-09-04
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention realizes the WS by hydrothermal method 2 Nanosheet Cocatalyst and ZnIn 2 S 4 The effective combination of the two photocatalysts solves the problem of ZnIn 2 S 4 The photocatalyst photogenerated electron-hole pair recombination rate is high, and it also appropriately improves the ZnIn 2 S 4 The spectral absorption properties of photocatalysts, thus enhancing the ZnIn 2 S 4 Photocatalytic hydrogen production efficiency of photocatalysts

Method used

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  • WS2/ZnIn2S4 composite visible light catalyst and preparation method thereof
  • WS2/ZnIn2S4 composite visible light catalyst and preparation method thereof
  • WS2/ZnIn2S4 composite visible light catalyst and preparation method thereof

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Effect test

Embodiment 1

[0018] (1) Firstly, WS was prepared by hydrothermal method 2 Two-dimensional nanosheets, the specific process is: Weigh 11.897 grams of WCl 6 and 22.767 grams of thioacetamide (CH 3 CSNH 2 ) was dissolved in 400 ml of deionized water and stirred for 1 hour to form a precursor solution, and then transferred to a 500 ml hydrothermal reaction kettle for 24 hours of hydrothermal reaction at 265 degrees; after the reaction was completed, it was cooled to room temperature, and the precipitated product was collected and passed through WS can be prepared after washing with water and freeze-drying for 24 hours 2 Nanosheets;

[0019] (2) 5 mg of WS synthesized above2 The nanosheets were dispersed in 50 ml of deionized water and dispersed by strong ultrasonic for 1 hour to form WS 2 suspension; then, 2mmol of ZnCl 2 , 4mmol of In(NO 3 ) 3 ·H 2 O and 8 mmol CH 3 CSNH 2 According to the stoichiometric molar ratio of 1:2:4 sequentially dissolved into the above configuration of WS ...

Embodiment 2

[0021] (1) WS 2 The preparation process of the two-dimensional nanosheet is the same as in Example 1;

[0022] (2) 15 mg of WS synthesized above 2 The nanosheets were dispersed in 50 ml of deionized water and dispersed by strong ultrasonic for 1 hour to form WS 2 suspension; then, 2mmol of ZnCl 2 , 4mmol of In(NO 3 ) 3 ·H 2 O and 8 mmol CH 3 CSNH 2 According to the stoichiometric molar ratio of 1:2:4 sequentially dissolved into the above configuration of WS 2 In the suspension, sonicate for 30 minutes to prepare a precursor solution; after that, transfer the precursor solution to a hydrothermal reactor and react at 160 degrees for 8 hours; after the reaction, cool to room temperature and collect the reaction product by suction filtration , washed several times with absolute ethanol and deionized water, dried overnight in a vacuum oven, and finally prepared WS containing 3% by mole 2 / ZnIn 2 S 4 The composite visible light catalyst, marked as 3%WS 2 / ZnIn 2 S 4 . ...

Embodiment 3

[0024] (1) WS 2 The preparation process of the two-dimensional nanosheet is the same as in Example 1;

[0025] (2) 25 mg of WS synthesized above 2 The nanosheets were dispersed in 50 ml of deionized water and dispersed by strong ultrasonic for 1 hour to form WS 2 suspension; then, 2mmol of ZnCl 2 , 4mmol of In(NO 3 ) 3 ·H 2 O and 8 mmol CH 3 CSNH 2 According to the stoichiometric molar ratio of 1:2:4 sequentially dissolved into the above configuration of WS 2 In the suspension, sonicate for 30 minutes to prepare a precursor solution; after that, transfer the precursor solution to a hydrothermal reactor and react at 160 degrees for 8 hours; after the reaction, cool to room temperature and collect the reaction product by suction filtration , washed several times with absolute ethanol and deionized water, dried overnight in a vacuum oven, and finally prepared WS containing 5% by mole 2 / ZnIn 2 S 4 The composite visible light catalyst, marked as 5%WS 2 / ZnIn 2 S 4 . ...

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Abstract

The invention belongs to the technical field of semiconductor photocatalysis, and particularly relates to a WS2 / ZnIn2S4 composite visible light catalyst and a preparation method thereof. The inventionprovides a WS2 / ZnIn2S4 composite visible light catalyst and a preparation method thereof. The preparation method is characterized in that a WS2 nano sheet used as a promoter is tightly combined withZnIn2S4 particles through a hydrothermal reaction, thereby forming the WS2 / ZnIn2S4 composite visible light catalyst. Compared with a pure ZnIn2S4 photocatalyst, the prepared WS2 / ZnIn2S4 composite visible light catalyst can effectively promote separation of photogenerated charges and reduce combination of photogenerated electrons and holes due to the formation of a semiconductor heterostructure, sothat the photocatalytic hydrogen production performance can be greatly improved. The WS2 / ZnIn2S4 composite visible light catalyst and the preparation method thereof which are provided by the invention provide a new idea and a new way for design and development of a novel efficient visible light catalyst.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, in particular to a WS 2 / ZnIn 2 S 4 Composite visible light catalyst and preparation method thereof. Background technique [0002] In today's society, the depletion of fossil energy and the deteriorating environmental pollution force human beings to find and develop new clean energy. Hydrogen energy has become a clean energy alternative to traditional fossil fuels due to its high energy, clean and pollution-free characteristics. In recent years, photocatalytic water splitting hydrogen production technology has attracted widespread attention from various countries because it can use renewable energy such as solar energy and water to obtain hydrogen. For the photocatalytic water splitting hydrogen production technology, the key to obtaining high-efficiency hydrogen production efficiency lies in the photocatalyst, but the most commonly used photocatalyst TiO 2 It can only a...

Claims

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Application Information

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IPC IPC(8): B01J27/047B01J35/00B01J35/02C25B1/06C25B11/04
CPCC25B1/04C25B11/04B01J27/047B01J35/00B01J35/30B01J35/39Y02E60/36
Inventor 秦来顺周佳波陈达黄岳祥孙杏国
Owner CHINA JILIANG UNIV
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