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A kind of preparation method and application of nitrogen-doped nano-zns/graphene photocatalytic material

A photocatalytic material and graphene technology, which is applied in the field of photocatalytic degradation of organic pollutants, can solve problems such as improving photocatalytic efficiency, and achieve the effects of improving electron conduction efficiency, improving visible light photocatalytic activity, and reducing band gap.

Active Publication Date: 2021-10-15
庄秀萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above modification methods of graphene composite and non-metal doping can effectively improve the photocatalytic performance of nano-ZnS, but its photocatalytic efficiency still needs to be further improved.

Method used

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  • A kind of preparation method and application of nitrogen-doped nano-zns/graphene photocatalytic material
  • A kind of preparation method and application of nitrogen-doped nano-zns/graphene photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Disperse 0.3g of graphene oxide in a mixed solution of 30ml of deionized water and ethanol, and ultrasonically disperse for 30 minutes to obtain a uniformly dispersed graphene oxide dispersion;

[0030] (2) Dissolve an appropriate amount of zinc nitrate in deionized water, stir and dissolve to obtain a 0.3mol / L zinc salt solution;

[0031] (3) Dissolve an appropriate amount of 2-methylimidazole in deionized water, stir and dissolve to obtain a 1mol / L 2-methylimidazole solution;

[0032] (4) Mix the solutions obtained in the above steps (1), (2) and (3). The molar ratio of zinc salt to 2-methylimidazole in the resulting mixture is 1:3. Magnetic stirring was performed for 6 hours, and the resulting product was centrifuged, washed with deionized water and ethanol several times, and dried to obtain the ZIF-8@graphene oxide composite;

[0033] (5) Put the ZIF-8@graphene oxide compound prepared above into the high temperature zone of the dual temperature zone tube furnac...

Embodiment 2

[0035] The addition of graphene oxide was adjusted so that the mass ratio of ZnS and graphene in the finally obtained photocatalytic material was 1:1, other conditions were the same as in Example 1, and the obtained photocatalytic material was designated as numbering S-2.

Embodiment 3

[0037] The addition of graphene oxide was adjusted so that the mass ratio of ZnS and graphene in the finally obtained photocatalytic material was 1:3, and other conditions were the same as in Example 1, and the resulting photocatalytic material was designated as numbering S-3.

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Abstract

The invention relates to a preparation method and application of a nitrogen-doped nanometer ZnS / graphene photocatalytic material, and belongs to the technical field of photocatalytic degradation of organic pollutants. In the present invention, after the in-situ growth of ZIF-8 framework on the surface of graphene oxide, high-temperature calcination in the gasified sulfur powder atmosphere carries out metal vulcanization and organic framework carbonization, thereby generating highly dispersed nitrogen-doped nano-ZnS / graphene composite material . Under the irradiation of visible light, the composite material obtained in the present invention has a degradation rate of up to 97% for the organic pollutant Rhodamine B, which is far superior to single nano-ZnS and nitrogen-doped ZnS / Graphene photocatalytic material has great application potential.

Description

technical field [0001] The invention relates to a preparation method and application of a nitrogen-doped nanometer ZnS / graphene photocatalytic material, and belongs to the technical field of photocatalytic degradation of organic pollutants. Background technique [0002] As the problem of environmental pollution becomes more and more prominent, searching for a new, non-polluting and economical solution to environmental pollution has far-reaching significance for the sustainable development of society. Photocatalytic technology is more and more favored by many scientific researchers and companies due to its advantages of energy saving, environmental protection, and efficient degradation of environmental pollutants. Photocatalysts have strong oxidizing ability, which uses solar energy as an effective light source to excite photocatalysts for catalytic reactions, and can quickly (several hours) completely mineralize and degrade organic pollution into CO at room temperature. 2 、...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24B01J35/004B01J35/0066C02F1/30C02F2101/38
Inventor 孙占仑
Owner 庄秀萍
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