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Preparation and Application of ZnIn2S4 Based Core-Shell Composite Photocatalyst

A technology of znin2s4 and complex light, which is applied in the direction of physical/chemical process catalysts, hydrogen/synthesis gas production, hydrogen production, etc., can solve the problems of catalyst stability reduction, catalyst stability not being improved, and inability to suppress photocorrosion, etc. Achieve the effects of improving stability, inhibiting photocorrosion, and improving photocatalytic reaction efficiency

Active Publication Date: 2020-01-14
FUQING BRANCH OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traditional ZnIn 2 S 4 Based composite photocatalysts, although the construction of ordinary heterostructures can effectively improve the catalytic reaction efficiency, but cannot inhibit the ZnIn 2 S 4 The photocorrosion phenomenon, the stability of the catalyst is still not improved
This is mainly due to the traditional ZnIn 2 S 4 In the composite photocatalyst, the photogenerated holes accumulate in the ZnIn 2 S 4 At the valence band position, photogenerated holes will oxidize ZnIn 2 S 4 The lattice S in 2- atoms, resulting in a decrease in the stability of the catalyst

Method used

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  • Preparation and Application of ZnIn2S4 Based Core-Shell Composite Photocatalyst
  • Preparation and Application of ZnIn2S4 Based Core-Shell Composite Photocatalyst
  • Preparation and Application of ZnIn2S4 Based Core-Shell Composite Photocatalyst

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preparation example Construction

[0039] NeO 3 @ZnIn 2 S 4 The preparation method of the composite photocatalyst of core-shell structure is, but not limited to the following method, which specifically includes the following steps carried out in sequence:

[0040] S1LaNiO 3 Solution preparation: LaNiO 3 The nanocubes are dispersed in deionized water, and the pH value is adjusted to 1.5-3 to obtain LaNiO 3 Suspension solution; LaNiO 3 The ratio of nano cubes to deionized water is 50-150 mg: 50-150 mL.

[0041] S2 LaNiO 3 The suspension solution is mixed with zinc salt compound, indium salt compound and sulfur-containing compound to obtain a mixed solution;

[0042] S3 After the mixed solution undergoes condensation-reflux reaction, the precipitate is collected, and the light yellow powder obtained after washing and drying is LaNiO 3 @ZnIn 2 S 4 Core-shell composite photocatalyst.

[0043] Wherein, in step S2, the mixed solution is stirred under ultrasonic waves for 1-2 hours.

[0044] Wherein, in ste...

Embodiment 1

[0053] A kind of composite photocatalyst, it is mainly ZnIn 2 S 4 Nanosheets supported on LaNiO 3 nanocube surface, the formation of LaNiO 3 @ZnIn 2 S 4 Core-shell composite photocatalyst.

Embodiment 2

[0055] NeO 3 @ZnIn 2 S 4 The preparation method of core-shell type composite photocatalyst, it comprises the following steps:

[0056] S1LaNiO 3 Preparation of nanocubes

[0057] 0.5 parts by mass of La(NO 3 ) 3 ·6H 2 O, 0.4 parts by weight of Ni(NO 3 ) 2 ·6H 2 O. 0.4 parts by weight of polyvinylpyrrolidone and 0.4 parts by weight of glycine were dissolved in 90 ml of deionized water, and the pH of the solution was adjusted to 7.9 with ammonia water. The above solution was transferred to a reaction kettle and reacted at 190°C for 14h. The obtained product was filtered with deionized water and ethanol solution, dried, and calcined at 700 °C for 3 h to obtain LaNiO 3 nanocube;

[0058] S2LaNiO 3 Solution preparation: 50mg of LaNiO 3 The nanocubes were dispersed in deionized water, and the pH value was adjusted to 1.5 to obtain LaNiO 3 suspension solution;

[0059] S3 LaNiO 3 suspension solution and ZnCl 2 , InCl 3 Mixed with thioacetamide to get the mixed solu...

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Abstract

The invention relates to a composite photocatalyst, in particular to a ZnIn2S4-based composite photocatalyst and a preparation method and application thereof. The ZnIn2S4-based composite photocatalystis mainly a LaNiO3@ZnIn2S4 core-shell composite photocatalyst formed by supporting ZnIn2S4 nano sheets on the surface of LaNiO3 nano cube surface. The preparation method comprises the following steps: dispersing LaNiO3 nano-cube in deionized water, mixing with zinc salt compound, indium salt compound and sulfur-containing compound, and performing condensing-reflux reaction, collecting the precipitate, and obtaining the powder after washing and drying, namely LaNiO3@ZnIn2S4 core-shell composite photocatalyst. The LaNiO3@ZnIn2S4 core-shell composite photocatalyst of the invention can improve the efficiency of photolysis of aquatic hydrogen, and the stability of the catalyst is also enhanced.

Description

technical field [0001] The invention relates to a composite photocatalyst, in particular to ZnIn 2 S 4 Based composite photocatalyst and its preparation method and application. Background technique [0002] With the development of modern society, energy crisis and environmental pollution have become important factors affecting the development of human society. h 2 As a kind of clean energy, it has been paid more and more attention by everyone. Since 1972, Fujishima and Honda first reported TiO 2 As a catalyst for photolysis of water to produce hydrogen, the use of semiconductor photocatalysts to catalyze the photolysis of water to produce hydrogen has received extensive attention. But since TiO 2 The bandgap width reaches 3.2eV, and it is difficult to use the visible light in solar energy for photolysis of water to produce hydrogen. Therefore, it is of great significance to develop new visible light-responsive photocatalysts for photolysis of water to produce hydrogen....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J35/02C01B3/04B01J35/00
CPCB01J27/043C01B3/042C01B2203/0277C01B2203/1088C01B2203/1047B01J35/00B01J35/30B01J35/39Y02E60/36
Inventor 王兆宇雷婕魏小莲程锦添陈益宾杨金杯
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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