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SnS2-Ce2S3-CeO2 ternary heterojunction and its preparation method and use

A heterojunction, sulfur source technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve problems such as poor photocatalytic hydrogen evolution effect

Active Publication Date: 2017-10-03
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of attaching C quantum dots avoids oxidation and corrosion in the process of photolysis of water, and at the same time improves the catalytic efficiency, but its photocatalytic hydrogen evolution effect is poor.

Method used

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  • SnS2-Ce2S3-CeO2 ternary heterojunction and its preparation method and use
  • SnS2-Ce2S3-CeO2 ternary heterojunction and its preparation method and use
  • SnS2-Ce2S3-CeO2 ternary heterojunction and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] SnS 2 -Ce 2 S 3 -CeO 2 Fabrication of ternary heterojunctions.

[0070] (1) Immerse the carbon cloth in an ethanol solution of 20mM tin tetrachloride and 80mM thioacetamide, and perform a hydrothermal reaction at 70°C for 6h to obtain SnS grown on the carbon cloth. 2 Nanosheets;

[0071] (2) SnS grown on carbon cloth obtained in step (1) 2 The nanosheets were immersed in an aqueous solution containing 20mM cerium nitrate and 80mM urotropine, and subjected to a hydrothermal reaction at 75°C for 15h to obtain a ternary heterojunction, which included SnS 2 -Ce 2 S 3 Nanostructure and Growth on SnS 2 -Ce 2 S 3 CeO on nanostructures 2 nanoparticles, and SnS 2 -Ce 2 S 3 Nanostructures made of SnS 2 Nanosheets and Growth on SnS 2 Ce on nanosheets 2 S 3 composed of nanoribbons.

[0072] The following sections briefly explain its performance metrics:

[0073] Figure 1a Be the SnS that embodiment 1 step (1) obtains 2 Nanosheets.

[0074] Figure 1c It is ...

Embodiment 2

[0079] Except that the time of step (2) hydrothermal reaction was adjusted to 6h, other preparation methods and conditions were the same as in Example 1, and SnS 2 -Ce 2 S 3 -CeO 2 Ternary heterojunction.

Embodiment 3

[0081] Except that the time of step (2) hydrothermal reaction was adjusted to 24h, other preparation methods and conditions were the same as in Example 1, and SnS 2 -Ce 2 S 3 -CeO 2 Ternary heterojunction.

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Abstract

The invention relates to a SnS2-Ce2S3-CeO2 ternary heterojunction and its preparation method and use and belongs to the field of inorganic semiconductor nanomaterials. The SnS2-Ce2S3-CeO2 ternary heterojunction comprises a SnS2 layer, a Ce2S3 layer and a CeO2 layer, has an excellent structure and stable chemical properties, greatly enhances the light absorption, can be used for photocatalytic hydrogen evolution, has good performances, greatly improves a hydrogen evolution rate and has the highest hydrogen evolution rate of 0.24 mmol*g<-1>*h<-1>. According to the method, SnS2 nanosheets are formed on a carbon cloth, then the SnS2 nanosheets are immersed into the solution containing a cerium source and urotropine, and Ce2S3 nanobelts and CeO2 nanoparticles grow in the solution by a hydrothermal method to form the SnS2-Ce2S3-CeO2 ternary heterojunction. The preparation method has the advantages of simple processes, operation convenience, fast speed, environmental friendliness and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of inorganic semiconductor nanomaterials, and relates to a ternary heterojunction, its preparation method and application, in particular to a tin sulfide-cerium sulfide-cerium oxide (SnS 2 -Ce 2 S 3 -CeO 2 ) ternary heterojunction, its preparation method and its use in photocatalytic hydrogen evolution. Background technique [0002] The use of solar energy to split water to produce hydrogen and oxygen is considered to be the most promising technology research in the field of clean energy. Its effectiveness lies in improving the ability of photocatalysts to absorb visible light and infrared light, and inhibiting the rapid recombination of photogenerated electrons and holes. At present, meeting these two requirements simultaneously is a great challenge. with single-component photocatalysts such as TiO 2 , ZnO, and CdS, the heterostructure is considered to be an effective way to solve these problems. By ...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/04
CPCC01B3/042B01J27/04C01B2203/0277B01J35/39Y02E60/36
Inventor 何军程中州
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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