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Preparation method of ZnIn2S4/Ag/Bi2WO6 compound photocatalyst with Z-type structure

A technology of znin2s4 and catalyst, which is applied in the field of inorganic environmental protection photocatalytic materials, can solve the problems of low hydrogen production efficiency, achieve the effects of improving quantum efficiency, increasing hydrogen production rate, and improving catalytic activity

Inactive Publication Date: 2018-11-23
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology uses silver particles (Ag) with different sizes that help it transport electricity from atoms called B2WO6 or Mo3N4 into zinc In2/S_valences at room temperature under specific conditions. These small metal particles act like tiny conductors allowing charges to flow through them efficiently while reducing resistance between neighboring points. By combining these materials together they create a more efficient way to produce clean energy without consuming too much power compared to traditional methods such as burning fossil fuels. Additionally, by adding another material containing certain elements onto this mixture, there may be benefits beyond just producing pure chemicals instead of greenhouse gases.

Problems solved by technology

This patented technical problem addressed by this patents relates to finding ways to produce cleanly enough fuel from solar light without causing environmental concerns or requiring expensive equipment like electrodes used during photoelectrocatalysis processes.

Method used

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  • Preparation method of ZnIn2S4/Ag/Bi2WO6 compound photocatalyst with Z-type structure
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  • Preparation method of ZnIn2S4/Ag/Bi2WO6 compound photocatalyst with Z-type structure

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Experimental program
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Embodiment 1

[0035] (1) Prepare 50 mL of a mixed solution containing zinc nitrate with a concentration of 0.05 mol / L and indium nitrate with a concentration of 0.1 mol / L, and add 0.751 g of thioacetamide to the mixed solution under stirring. After stirring at room temperature for 2 hours, add 3 mL of hydrochloric acid solution with a concentration of 12 mol / L, continue to stir for 3 hours, then transfer to a hydrothermal reaction kettle, then put the hydrothermal reaction kettle in a dry box and react at 180°C for 1 hour. After the reaction is completed, ZnIn can be obtained by cooling, washing and drying 2 S 4 solid powder;

[0036] (2) Prepare 75 mL of sodium tungstate solution with a concentration of 0.01mol / L, and add the ZnIn prepared in step (1) to the sodium tungstate solution under stirring 2 S 4 Solid powder forms a suspension solution; slowly add 150mL bismuth nitrate solution with a concentration of 0.01mol / L to the suspension solution dropwise; adjust the pH to 9 with ammoni...

Embodiment 2

[0041] (1) Prepare 50ml of a mixed solution containing zinc nitrate with a concentration of 0.1mol / L and indium nitrate with a concentration of 0.2mol / L, and add 1.502g of thioacetamide to the mixed solution under stirring. After stirring at room temperature for 0.5h, add 1ml of hydrochloric acid solution with a concentration of 12mol / L, continue to stir for 1h, then transfer to a hydrothermal reaction kettle, then put the hydrothermal reaction kettle into a dry box and react at 160°C for 1h, and wait for the reaction to complete After cooling, washing and drying, ZnIn can be obtained 2 S 4 solid powder;

[0042] (2) Prepare 150ml of sodium tungstate solution with a concentration of 0.02mol / L, and add the ZnIn prepared in step (1) to the sodium tungstate solution under stirring 2 S 4 Solid powder forms a suspension solution; slowly add 300ml of bismuth nitrate solution with a concentration of 0.02mol / L to the suspension solution dropwise; adjust the pH to 7 with ammonia wat...

Embodiment 3

[0045] (1), preparation 50ml contains the zinc nitrate concentration that is 0.05mol / L and the mixed solution that concentration is the indium nitrate of 0.1mol / L, adds 0.751g thioacetamide in the mixed solution under stirring state. After stirring at room temperature for 1 hour, add 2ml of hydrochloric acid solution with a concentration of 12mol / L, continue to stir for 2 hours, then transfer to a hydrothermal reaction kettle, then put the hydrothermal reaction kettle in a drying oven and react at 150°C for 3 hours. After the reaction is completed, ZnIn can be obtained by cooling, washing and drying 2 S 4 solid powder;

[0046] (2) Prepare 75 mL of sodium tungstate solution with a concentration of 0.02mol / L, and add the ZnIn prepared in step (1) to the sodium tungstate solution under stirring 2 S 4 Solid powder forms a suspension solution; slowly add 150mL bismuth nitrate solution with a concentration of 0.02mol / L to the suspension solution dropwise; adjust the pH to 8 with...

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Abstract

The invention discloses a ZnIn2S4/Ag/Bi2WO6 compound photocatalyst with a Z-type structure and a preparation method thereof, and belongs to the field of inorganic functional materials. The preparationmethod comprises the following step: compounding ZnIn2S4, Ag and Bi2WO6 to prepare the ZnIn2S4/Ag/Bi2WO6 compound photocatalyst, wherein the mass ratio of the ZnIn2S4to the Ag to the Bi2WO6 is 1 to (0.01 to 0.05) to (0.5 to 1). According to the preparation method disclosed by the invention, Ag nanoparticles are used as an electron conduction medium and electrons on a Bi2WO6 conduction band can berapidly transferred to a ZnIn2S4 valence band and are compounded with holes on the ZnIn2S4 valence band, so that the compounding speed of photoelectrons and photoholes in the ZnIn2S4 catalyst is effectively reduced, and the quantum efficiency and the ZnIn2S4water-photolysis hydrogen production catalytic activity are improved; the method provided by the invention has moderate operation conditionsand is easy to control.

Description

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Claims

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Application Information

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Owner HENAN NORMAL UNIV
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