Preparation method of sulfide containing sulfur defect and method for photocatalytic reduction of carbon dioxide

A sulfide and defect technology, used in carbon compound catalysts, chemical instruments and methods, and hydrocarbon production from carbon oxides, etc., to achieve high methane selectivity, good reaction stability, and good thermal stability.

Active Publication Date: 2020-04-24
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, ternary metal sulfide ultrathin sheets containing sulfur defects are prepared and used for highly selective photocatalytic reduction of CO 2 The application of methane production has not been reported

Method used

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  • Preparation method of sulfide containing sulfur defect and method for photocatalytic reduction of carbon dioxide
  • Preparation method of sulfide containing sulfur defect and method for photocatalytic reduction of carbon dioxide
  • Preparation method of sulfide containing sulfur defect and method for photocatalytic reduction of carbon dioxide

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preparation example Construction

[0033] For visible light catalytic reduction of CO in the prior art 2 The current situation, this application provides a CuIn containing sulfur defects 5 S 8 The preparation method of sulfide, utilize the above-mentioned prepared sulfide to realize CO 2 Catalytic reduction under visible light, and the product has high selectivity and stability. Specifically, the embodiment of the present invention discloses a CuIn containing sulfur defects 5 S 8 The preparation method of sulfide, comprises the following steps:

[0034] Indium chloride tetrahydrate, copper acetate monohydrate and thioacetamide were reacted in an organic solvent to obtain ternary CuIn 5 S 8ultra-thin slices;

[0035] The ternary CuIn 5 S 8 Ultrathin flakes subjected to rapid calcination to obtain CuIn with sulfur defects 5 S 8 sulfide.

[0036] In the preparation of CuIn with sulfur defects 5 S 8 In the process of sulfide, the present application first prepared the complete ternary CuIn 5 S 8 In ...

Embodiment 1

[0053] Add 70mg of indium chloride tetrahydrate and 40mg of copper acetate monohydrate into 30mL of ethylene glycol, stir vigorously for 30min, and when completely dissolved, add 72mg of thioacetamide, stir again for 30min, and transfer the obtained transparent solution to a 40mL high-pressure In the reaction kettle, seal the reaction at 180°C for 24 hours; after the reaction is completed, naturally cool to room temperature, centrifuge the obtained sample, wash with water and ethanol several times, and finally dry the precipitate in a vacuum drying oven; after the sample is dried, take an appropriate amount of the obtained sample In a tube furnace, quickly calcined at 450°C for 2 minutes in a hydrogen-argon (5%) atmosphere, and took it out after cooling to obtain a powder that is ternary CuIn with sulfur defects. 5 S 8 ultra-thin slices.

Embodiment 2

[0056] Add 70mg of indium chloride tetrahydrate and 40mg of copper acetate monohydrate into 30mL of ethylene glycol, stir vigorously for 30min, and when completely dissolved, add 72mg of thioacetamide, stir again for 30min, and transfer the obtained transparent solution to a 40mL high-pressure In the reaction kettle, seal the reaction at 180°C for 24 hours; after the reaction, cool naturally to room temperature, centrifuge the obtained sample, wash with water and ethanol several times, and finally dry the precipitate in a vacuum drying oven to obtain a powder that is the complete ternary CuIn 5 S 8 ultra-thin slices.

[0057] The compound that embodiment prepares is carried out structural identification, the result sees Figure 1 ~ Figure 3 , figure 1 The complete ternary CuIn prepared in this example is provided 5 S 8 The XRD diffraction pattern of the ultrathin sheet (curve b); figure 2 The complete ternary CuIn prepared in this example is provided 5 S 8 TEM image (F...

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Abstract

The invention provides a preparation method of CuIn5S8 sulfide containing a sulfur defect. The method comprises steps as follows: indium chloride tetrahydrate, cupric acetate monohydrate and thioacetamide are subjected to a reaction in an organic solvent, and a ternary CuIn5S8 ultrathin sheet is obtained; the ternary CuIn5S8 ultrathin sheet is rapidly calcined, and the sulfide containing the sulfur defect is obtained. The invention also provides a method for catalytic reduction of CO2 under visible light by use of the prepared CuIn5S8 sulfide containing the sulfur defect. Experimental resultsshow that the ternary CuIn5S8 sulfide containing the sulfur defect has higher selectivity for catalytic reduction of CO2 into CH4 under visible light and can catalytically reduce almost 100% of CO2 into CH4 under visible light irradiation, and the CH4 production rate is about 8.7 mu mol.g<-1>.h<-1>.

Description

technical field [0001] The invention relates to the field of carbon dioxide preparation, in particular to a CuIn containing sulfur defects 5 S 8 Preparation method of sulfide and photocatalytic reduction of CO 2 Methods. Background technique [0002] In today's society, the rapid development of industry has brought serious environmental pollution and energy shortages. How to effectively solve energy and environmental problems has become a worldwide topic. Excessive use of fossil fuels releases large amounts of CO 2 , leading to many problems such as glacier melting, sea level rise and greenhouse effect, which greatly hindered the sustainable development of human society. will CO 2 Converting into clean energy can help to solve the problems of energy shortage and environmental degradation at the same time, so CO 2 It is also a potential carbon resource, how to effectively use CO 2 became a global hotspot. [0003] Light energy is an inexhaustible and inexhaustible cle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00B01J27/04C07C1/02C07C9/04
CPCB01J27/04B01J35/004C01G15/006C07C1/02C07C2527/04C07C9/04
Inventor 孙永福李小东谢毅
Owner UNIV OF SCI & TECH OF CHINA
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