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Composite photocatalyst MxP/indium zinc sulfide as well as preparation method and application thereof

A technology of catalysts and composite light, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. problem, to achieve the effect of being conducive to large-scale promotion, high charge separation efficiency, and low cost

Active Publication Date: 2018-10-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But ZnIn 2 S 4 Photogenerated electrons and holes are easy to recombine, and the short lifetime of photogenerated carriers leads to low photocatalytic efficiency, which affects its practical application prospects in the field of photocatalysis
A large number of studies have shown that noble metal modification is an effective way to improve the activity of photocatalysts, but the low reserves and high cost of noble metals greatly limit their large-scale application.

Method used

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  • Composite photocatalyst MxP/indium zinc sulfide as well as preparation method and application thereof
  • Composite photocatalyst MxP/indium zinc sulfide as well as preparation method and application thereof
  • Composite photocatalyst MxP/indium zinc sulfide as well as preparation method and application thereof

Examples

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preparation example Construction

[0030] The composite photocatalyst of the present invention is Co x P / ZnIn 2 S 4The composite sample is applied to the visible light catalytic decomposition of water to produce hydrogen. The preparation method of the photocatalyst is a photodeposition composite method. The specific steps are as follows:

[0031] (1) Preparation of ZnIn by hydrothermal method 2 S 4

[0032] Dissolving the solid compound as the sulfur source in a solvent to prepare a sulfur source solution; dissolving the solid compound as an indium source in a solvent to obtain an indium source solution; dissolving the solid compound as a zinc source in a solvent to obtain a zinc source solution ; Add indium source solution and zinc source solution dropwise in the sulfur source solution while stirring, continue stirring for 30-120 minutes, move the mixed solution into a high-pressure reactor at 100-200°C for 12-24 hours at a constant temperature, cool naturally to room temperature, and precipitate Alternat...

Embodiment 1

[0040] Composite photocatalyst Co x P / ZnIn 2 S 4 preparation of

[0041] (1) Weigh 0.204g zinc chloride (ZnCl 2 ), 0.88g indium chloride (InCl 3 ) and 0.451g thioacetamide (CH 3 CSNH 2 ) were respectively dissolved in 20mL of deionized water, zinc chloride solution and indium chloride solution were successively added dropwise to the thioacetamide solution, and the stirring was continued for 60 minutes, and the mixed solution was moved into an autoclave at 200°C for constant temperature reaction for 24 hours, and cooled naturally to room temperature, the precipitate was alternately washed with ethanol and water and centrifuged to an ion concentration 2 S 4 sample powder;

[0042] (2) Weigh 0.1g ZnIn 2 S 4 Ultrasonic dispersion in 1mL water, add 0.1mol / L CoCl 2 ·6H 2 O solution 2mL, stirred for 5min, then added 0.2mol / L NaH 2 PO 2 The solution was 7mL, stirred for 30min under Ar atmosphere, irradiated with a 300W xenon lamp for 5min, and the light was terminated. Th...

Embodiment 2

[0047] co x P / ZnIn 2 S 4 Photocatalytic water splitting hydrogen production performance of composite samples

[0048] Co obtained under the conditions of Example 1 x P / ZnIn 2 S 4 The composite sample is used as a photocatalyst to decompose water to produce hydrogen. The reaction of photocatalyst to decompose water to produce hydrogen is carried out in a sealed circulation system under normal pressure. Xenon lamp light source (add 420nm filter), weigh 20mg sample in the reactor, then add 90mL H 2 O and 10mL lactic acid, and stirred evenly by a magnetic stirrer. The entire reaction system was evacuated with a mechanical pump before lighting, and then filled with high-purity Ar. Repeat this process 3 times to remove the air in the system, turn on the agitator and the gas circulation pump, and turn on the light after the adsorption for 30 minutes to balance. The product is injected into the six-way valve through the gas circulation pump, and is detected and analyzed by onli...

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Abstract

The invention discloses a composite photocatalyst MxP / indium zinc sulfide as well as a preparation method and the application thereof. The composite photocatalyst is prepared by compounding sulfide indium zinc (ZnIn2S4) with an amorphous alloy (MxP); a non-precious metal inorganic salt and hypophosphite solution is fully mixed with the ZnIn2S4; in an inert atmosphere, the zero-valent phosphorus and non-noble metal M are co-deposited on the surface of the ZnIn2S4 to form an amorphous alloy MxP under illumination by utilizing the visible-light response characteristics of the ZnIn2S4. Compared with the ZnIn2S4, the prepared MxP / ZnIn2S4 composite material has the characteristic that the activity of prepared MxP / ZnIn2S4 composite material for producing hydrogen by visible light catalyzed decomposition of water is significantly improved. The method disclosed the invention has the advantages of no need of introducing a reducing agent, low cost, environment friendliness, simplicity, feasibility and easiness in large scale popularization.

Description

technical field [0001] The invention relates to a high-efficiency, stable and low-cost photocatalytic material responsive to visible light and its preparation method and application, in particular to a composite photocatalyst M x P / sulfur indium zinc and its preparation method and application. Background technique [0002] In recent years, sulfur indium zinc (ZnIn 2 S 4 ) has attracted much attention as an important visible light-responsive photocatalytic material because of its good effect in visible light catalytic degradation of organic pollutants, water splitting, hydrogen production, and oxygen production. But ZnIn 2 S 4 Photogenerated electrons and holes are easy to recombine, and the short lifetime of photogenerated carriers leads to low photocatalytic efficiency, which affects its practical application prospects in the field of photocatalysis. A large number of studies have shown that noble metal modification is an effective way to improve the activity of photoc...

Claims

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Application Information

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IPC IPC(8): B01J27/185C01B3/04B01J37/03B01J37/10B01J37/34
CPCC01B3/042B01J27/1853B01J37/035B01J37/10B01J37/343C01B2203/1076C01B2203/1082C01B2203/1047C01B2203/1058C01B2203/1052C01B2203/0277B01J35/39Y02E60/36
Inventor 苏文悦贺奕杉王绪绪付贤智王心晨陈旬戴文新
Owner FUZHOU UNIV
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