Carbon nitride-carbon-TiO2-selenium nano composite material as well as preparation method and application thereof

A composite material and carbon nitride technology, applied in the field of photocatalysis, can solve the problems of low utilization rate of solar energy, limited application, easy compounding, etc., and achieve the effect of being beneficial to adsorption, ensuring catalytic performance, and increasing absorption area.

Inactive Publication Date: 2018-11-23
李忠
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, as a wide bandgap semiconductor catalyst, TiO 2 It can only absorb and utilize ultraviolet light, which accounts for about 4% of the solar spectrum, and the utilization rate of solar energy is too low. At the same time, photogenerated electron-hole pairs are easy to recombine. These shortcomings limit its practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A carbon nitride-carbon-TiO 2 -The preparation method of selenium nanocomposite material, concrete steps are as follows:

[0046](1) Acidify the multi-walled carbon nanotubes and disperse them in water, then add selenous acid, stir and disperse evenly to obtain a mixed dispersion, add concentrated ammonia water (mass concentration 22%) drop by drop, adjust to pH = 10, freeze, Pulverizing to make the first powder; freezing and pulverizing the ascorbic acid aqueous solution to make the second powder; mixing and grinding the first powder and the second powder at low temperature to obtain the multi-walled carbon nanotube-nano-selenium composite material;

[0047] (2) Alkynylation modification of multi-walled carbon nanotubes-nano-selenium composites;

[0048] (3) Add nano-titanium dioxide to the DMF solution of nano-carbon nitride, heat-treat at 130°C for 50 minutes, filter, wash, dry, calcinate, and cool naturally to obtain nano-carbon nitride-nano-titanium dioxide compos...

Embodiment 2

[0065] A carbon nitride-carbon-TiO 2 -The preparation method of selenium nanocomposite material, concrete steps are as follows:

[0066] (1) Acidify the multi-walled carbon nanotubes and disperse them in water, then add selenous acid, stir and disperse evenly to obtain a mixed dispersion, add concentrated ammonia water (mass concentration 25%) drop by drop, adjust to pH = 10, freeze, Pulverizing to make the first powder; freezing and pulverizing the ascorbic acid aqueous solution to make the second powder; mixing and grinding the first powder and the second powder at low temperature to obtain the multi-walled carbon nanotube-nano-selenium composite material;

[0067] (2) Alkynylation modification of multi-walled carbon nanotubes-nano-selenium composites;

[0068] (3) Adding nano-titanium dioxide to the DMF solution of nano-carbon nitride, heat-treating at 150°C for 60 minutes, filtering, washing, drying, calcining, and natural cooling to obtain nano-carbon nitride-nano-titani...

Embodiment 3

[0085] A carbon nitride-carbon-TiO 2 -The preparation method of selenium nanocomposite material, concrete steps are as follows:

[0086] (1) Acidify the multi-walled carbon nanotubes and disperse them in water, then add selenous acid, stir and disperse evenly to obtain a mixed dispersion, add concentrated ammonia water (mass concentration 22%) drop by drop, adjust to pH = 10, freeze, Pulverizing to make the first powder; freezing and pulverizing the ascorbic acid aqueous solution to make the second powder; mixing and grinding the first powder and the second powder at low temperature to obtain the multi-walled carbon nanotube-nano-selenium composite material;

[0087] (2) Alkynylation modification of multi-walled carbon nanotubes-nano-selenium composites;

[0088](3) Add nano-titanium dioxide to the DMF solution of nano-carbon nitride, heat-treat at 150°C for 50 minutes, filter, wash, dry, calcinate, and cool naturally to obtain nano-carbon nitride-nano-titanium dioxide compos...

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Abstract

The invention provides a carbon nitride-carbon-TiO2-selenium nano composite material applied to photocatalytic degradation of pollutants. According to the invention, an azide-modified nano-carbon nitride-nano-titanium dioxide composite material is covalently chelated to the surface of an alkynylation-modified multi-walled carbon nanotube-nano selenium composite material to obtain a carbon nitride-carbon-TiO2-selenium nano composite material. The material can be applied to photocatalytic degradation of pollutants and has excellent photocatalytic degradation properties for the pollutants.

Description

technical field [0001] The technical field of photocatalysis of the present invention, in particular relates to a carbon nitride-carbon-TiO applied to photocatalytic degradation of pollutants 2 - Selenium nanocomposites. Background technique [0002] With the continuous development of human society and industry, globalized environmental pollution and energy crisis are increasingly threatening the survival of human beings. Photocatalytic technology is one of the research fields of cutting-edge science. Compared with traditional pollution treatment methods, photocatalytic degradation of pollutants has the advantages of low energy consumption, simple operation, mild reaction conditions and less secondary pollution. The core technology of photocatalytic degradation of pollutants is to develop photocatalytic materials with high quantum conversion efficiency. [0003] Due to TiO 2 It can effectively catalyze and degrade various pollutants under ultraviolet light irradiation, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 李忠
Owner 李忠
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