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ZnS/ZnO core-shell structure and preparation method and application thereof

A technology of core-shell structure and solvothermal method, which is applied in the field of nanocomposite materials, can solve the problems of low catalytic efficiency of photocatalysts, solve the serious recombination of photogenerated electrons and holes, and stabilize the chemical structure and performance of products, theoretically and practically. significant effect

Inactive Publication Date: 2017-12-12
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the recombination of photogenerated electrons and holes in a single photocatalyst is relatively serious, resulting in low catalytic efficiency of the photocatalyst. Therefore, it is a very effective method to improve the separation efficiency of photogenerated electrons and holes by constructing a heterojunction. A method to improve the catalytic efficiency of photocatalysts

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  • ZnS/ZnO core-shell structure and preparation method and application thereof
  • ZnS/ZnO core-shell structure and preparation method and application thereof
  • ZnS/ZnO core-shell structure and preparation method and application thereof

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Embodiment 1

[0040] The embodiment of the present invention provides a method for preparing a ZnS / ZnO core-shell structure, the specific steps are as follows:

[0041] (1) Prepare ZnS(en) by solvothermal method 0.5 Precursor, specifically, zinc powder is used as the zinc source, sulfur powder is used as the sulfur source, and ethylenediamine is used as the solvent. The molar ratio of zinc powder and sulfur powder is controlled to be 1:2, and the filling degree of the reactor is controlled to be 60%. Solvothermal method reacted at 180°C for 24h;

[0042] (2) Weigh 0.12g of ZnS(en) 0.5The precursor was placed in a tube furnace, and in an air atmosphere, the temperature was raised from room temperature to 500 °C at a rate of 10 °C / min, then kept at this temperature for 1 h, and finally cooled down to room temperature naturally.

Embodiment 2

[0044] The embodiment of the present invention provides a method for preparing a ZnS / ZnO core-shell structure, the specific steps are as follows:

[0045] (1) Prepare ZnS(en) by solvothermal method 0.5 Precursor, specifically, zinc powder is used as the zinc source, sulfur powder is used as the sulfur source, and ethylenediamine is used as the solvent. The molar ratio of zinc powder and sulfur powder is controlled to be 1:2, and the filling degree of the reactor is controlled to be 60%. Solvothermal method reacted at 180°C for 24h;

[0046] (2) Weigh 0.12g of ZnS(en) 0.5 The precursor was placed in a tube furnace, and in an air atmosphere, the temperature was raised from room temperature to 500 °C at a rate of 10 °C / min, then kept at this temperature for 4 h, and finally cooled down to room temperature naturally.

[0047] figure 1 Shown is the X-ray diffraction figure of the prepared ZnS / ZnO core-shell structure in embodiment 1 and embodiment 2, figure 1 The upper right co...

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Abstract

The invention discloses a ZnS / ZnO core-shell structure and a preparation method and application thereof. The ZnS / ZnO core-shell structure is a nano composite structure with ZnS as the core and ZnO as the shell. The preparation method of ZnS / ZnO core-shell structure comprises preparing a ZnS (en) 0.5 precursor through a solvothermal method, performing high-temperature treatment on the ZnS (en) 0.5 precursor under oxidizing atmosphere to oxide the surface of ZnS into ZnO and accordingly to form the ZnS / ZnO core-shell structure. The ZnS / ZnO core-shell structure has a broad application prospect in the field of photocatalysis. The ZnS / ZnO core-shell structure is prepared through high-temperature treatment on the ZnS (en) 0.5 precursor under the oxidizing atmosphere, and the core-shell component ratio can be adjusted by changing high-temperature treatment time and temperature; by structuring heterojunctions of the ZnS / ZnO core-shell structure, the separating efficiency of photo-induced electrons and holes can be improved, and the catalytic efficiency can be improved. The ZnS / ZnO core-shell structure is mild in preparation conditions, simple in process, stable in structural performance, excellent in catalytic performance and large in significance.

Description

technical field [0001] The invention relates to the field of nanocomposite materials, in particular to a ZnS / ZnO core-shell structure and its preparation method and application. Background technique [0002] With the rapid development of social economy, energy crisis and environmental pollution have become two major social problems that people face. Since 1972, Japanese scientists Fujishima and Honda discovered TiO 2 Since the electrode can decompose water to produce hydrogen under ultraviolet light, semiconductor photocatalysis technology has attracted more and more attention from scientists, and it has shown potential application prospects in the fields of environment and energy, and has become a research hotspot all over the world. . Inspired by "photosynthesis" in nature, artificial photosynthesis, that is, using solar energy to convert CO 2 Converting to solar fuel can not only alleviate the crisis of energy shortage, but also solve the problem of greenhouse effect a...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J37/08B01J37/14C01B3/04C01B32/40
CPCC01B3/042B01J27/04B01J37/08B01J37/14B01J35/39Y02E60/36
Inventor 贺涛李盼
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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