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A Schottky junction sn/cd 3 (c 3 no 3 the s 3 ) 2 Photocatalyst and its preparation method and application

A Schottky junction, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, carbon monoxide, etc., can solve problems such as unfavorable photocatalytic reduction, achieve photocatalytic activity, enhance separation efficiency, and alleviate energy. effects of crisis

Active Publication Date: 2022-03-11
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cd 3 (C 3 N 3 S 3 ) 2 Severe carrier reorganization is not conducive to the photocatalytic reduction of CO 2

Method used

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  • A Schottky junction sn/cd <sub>3</sub> (c <sub>3</sub> no <sub>3</sub> the s <sub>3</sub> ) <sub>2</sub> Photocatalyst and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0023] A Schottky junction Sn / Cd 3 (C 3 N 3 S 3 ) 2 The preparation method of photocatalyst comprises the steps:

[0024] (1) Octahedral Cd 3 (C 3 N 3 S 3 ) 2 Preparation: Add 0.01mol thiocyanuric acid to 0.15mol / L sodium hydroxide aqueous solution to dissolve to form 50ml solution A, add 0.015mol cadmium salt to 50ml deionized water to dissolve to form solution B, and under vigorous stirring, dissolve the solution B was slowly added to solution A, and then aged for 24 hours under gentle stirring, and then the dispersed precipitate was washed, centrifuged, and dried to obtain the octahedral Cd 3 (C 3 N 3 S 3 ) 2 ;

[0025] (2) Octahedral Sn / Cd 3 (C 3 N 3 S 3) 2 Preparation of Schottky junction photocatalyst: First, 0.3426g of octahedral Cd prepared in step (1) 3 (C 3 N 3 S 3 ) 2 Disperse in 30ml of deionized water containing 0.1892g of sodium borohydride solution, then add 0.0326g of tin chloride to the above dispersion, stir for 30min and centrifuge, w...

Embodiment 2

[0028] A Schottky junction Sn / Cd 3 (C 3 N 3 S 3 ) 2 The preparation method of photocatalyst comprises the steps:

[0029] (1) Octahedral Cd 3 (C 3 N 3 S 3 ) 2 Preparation: Dissolve 0.02mol thiocyanuric acid in 0.3 mol / L sodium hydroxide aqueous solution to form 100ml solution A, add 0.03mol cadmium salt to 100ml deionized water and dissolve to form solution B, under vigorous stirring, dissolve solution B Slowly add solution A, then age under gentle stirring for 12 hours, then wash, centrifuge and dry the dispersed precipitate to obtain the octahedral Cd 3 (C 3 N 3 S 3 ) 2 ;

[0030] (2) Octahedral Sn / Cd 3 (C 3 N 3 S 3 ) 2 Preparation of Schottky junction photocatalyst: First, 0.3426g of octahedral Cd prepared in step (1) 3 (C 3 N 3 S 3 ) 2 Disperse in the solution that contains 0.1892g sodium borohydride in 40ml ethanol, then add 0.0113g stannous chloride to above-mentioned dispersion liquid, after stirring for 50min, centrifuge, wash and dry the precip...

Embodiment 3

[0033] A Schottky junction Sn / Cd 3 (C 3 N 3 S 3 ) 2 The preparation method of photocatalyst comprises the steps:

[0034] (1) Octahedral Cd 3 (C 3 N 3 S 3 ) 2 Preparation: Add 0.001mol thiocyanuric acid to 0.015mol / L sodium hydroxide aqueous solution to dissolve to form 100ml solution A, add 0.0015mol cadmium salt to 100ml deionized water to dissolve to form solution B, under vigorous stirring, dissolve the solution B was slowly added to solution A, and then aged under gentle stirring for 10 hours, and then the dispersed precipitate was washed, centrifuged, and dried to obtain the octahedral Cd 3 (C 3 N 3 S 3 ) 2 ;

[0035] (2) Octahedral Sn / Cd 3 (C 3 N 3 S 3 ) 2 Preparation of Schottky junction photocatalyst: First, 0.3426g of octahedral Cd prepared in step (1) 3 (C 3 N 3 S 3 ) 2 Disperse in 25ml of deionized water containing 0.1892g of sodium borohydride solution, then add 0.0015g of stannous sulfate to the above dispersion, stir for 20min and centrif...

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Abstract

The invention discloses a Schottky junction Sn / Cd 3 (C 3 N 3 S 3 ) 2 Photocatalyst and its preparation method and application, comprising the following steps: (1) preparing octahedral Cd 3 (C 3 N 3 S 3 ) 2 ; (2) at first, the octahedral Cd prepared by step (1) 3 (C 3 N 3 S 3 ) 2 Disperse in sodium borohydride solution, then add tin salt to the dispersion, stir for a period of time, centrifuge, wash and dry the precipitate to obtain the photocatalyst. The photocatalyst of the present invention has many advantages such as a simple preparation method, low-cost raw materials, photocatalytic carbon dioxide reduction performance and strong cycle stability, so as to achieve the important role of carbon neutralization, and has broad prospects in the application of the photocatalysis field.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy materials, in particular to a Schottky junction Sn / Cd 3 (C 3 N 3 S 3 ) 2 Photocatalyst and its preparation method and application. Background technique [0002] Today, excess CO is produced due to increased consumption of fossil fuels 2 Emissions are causing a growing number of environmental problems across the globe. Photocatalytic reaction driven by sunlight to convert CO 2 converted into useful chemical fuels, thus targeting the excessive release of CO 2 environmental problems caused. in CO 2 During the photocatalytic conversion process, the semiconductor excited by light can generate photogenerated electrons, which convert the adsorbed CO through multiple steps of proton coupling and electron transfer. 2 into useful chemical fuels. To achieve this goal, developing efficient photocatalysts with ideal charge separation efficiency is a top priority. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C01B32/40
CPCB01J27/24B01J35/004C01B32/40
Inventor 代凯李旭东张金锋
Owner HUAIBEI NORMAL UNIVERSITY