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.
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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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