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A nitrogen doped nano cos 2 Preparation method and application of graphene photocatalytic material

A photocatalytic material and graphene technology, applied in the field of photocatalytic degradation of organic pollutants, can solve problems such as improving photocatalytic efficiency, and achieve the effect of improving electronic conduction efficiency, large application potential, and reducing band gap.

Active Publication Date: 2021-10-22
丁道其
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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-cobalt sulfide, but its photocatalytic efficiency still needs to be further improved

Method used

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  • A nitrogen doped nano cos <sub>2</sub> Preparation method and application of graphene photocatalytic material
  • A nitrogen doped nano cos <sub>2</sub> Preparation method and application of graphene photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Disperse 0.2g of graphene oxide in a mixed solution of 20ml 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 cobalt nitrate in deionized water, stir and dissolve to obtain a 0.3mol / L cobalt 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 cobalt salt and 2-methylimidazole in the obtained mixed solution is 1:3, after ultrasonic dispersion for 30 minutes, at 40°C 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-67@graphene oxide composite;

[0033] (5) Put the ZIF-67@graphene oxide compound prepared above into ...

Embodiment 2

[0035] Adjust the amount of graphene oxide added so that the final photocatalytic material contains CoS 2 The mass ratio to graphene is 3:1, other conditions are the same as in Example 1, and the obtained photocatalytic material is marked as number S-2.

Embodiment 3

[0037] Adjust the amount of graphene oxide added so that the final photocatalytic material contains CoS 2 The mass ratio to graphene is 1:2, other conditions are the same as in Example 1, and the obtained photocatalytic material is marked as number S-3.

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Abstract

The invention relates to a nitrogen-doped nano-CoS 2 A preparation method and application of graphene photocatalytic materials belong to the technical field of photocatalytic degradation of organic pollutants. In the present invention, after in-situ growth of the ZIF-67 framework on the surface of graphene oxide, high-temperature calcination in the atmosphere of gasified sulfur powder is carried out to carry out metal vulcanization and carbonization of the organic framework, thereby generating highly dispersed nitrogen-doped nano-CoS 2 / Graphene composites. Under visible light irradiation, the composite material obtained by the present invention has a degradation rate of up to 95% for the organic pollutant rhodamine B, which is far superior to that of single nanometer CoS 2 and nitrogen-doped CoS obtained by conventional hydrothermal compounding and subsequent ammonia heat treatment 2 / Graphene photocatalytic material has great application potential.

Description

technical field [0001] The invention relates to a nitrogen-doped nano-CoS 2 A preparation method and application of graphene photocatalytic materials belong 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 、H 2 In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24B01J35/004B01J35/0066C02F1/30C02F2101/38C02F2305/10
Inventor 孙占仑
Owner 丁道其
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