A kind of graphene-based photocatalyst and preparation method thereof

A photocatalyst and graphene technology, applied in the field of photocatalysis, can solve the problems of increased interface transport resistance of photogenerated carriers, application limitations of nano-based light-responsive materials, and increased utilization efficiency of photocatalysts, and achieves enhanced interface charge transport rate. , Improve the photocatalytic efficiency, the effect of light weight

A photocatalyst and graphene technology, applied in the field of photocatalysis, can solve the problems of increased interface transport resistance of photogenerated carriers, application limitations of nano-based light-responsive materials, and increased utilization efficiency of photocatalysts, and achieves enhanced interface charge transport rate. , Improve the photocatalytic efficiency, the effect of light weight

CN112169844BActive Publication Date: 2021-10-26江苏威久科技发展有限公司
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  • A kind of graphene-based photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] A graphene-based photocatalyst is formed by grafting nano-composite powder and modified aerogel, and the mass ratio of nano-composite powder and modified aerogel is 3:4.

[0045] The dosage of each raw material for preparing the nanocomposite powder is as follows: in parts by weight, 20 parts of amino-terminated hyperbranched polysiloxane, 25 parts of nickel ferrite, and 28 parts of copper bismuthate.

[0046] The dosage of each raw material for preparing the modified aerogel is as follows: by weight, 40 parts of ethyl orthosilicate, 45 parts of graphene oxide, 20 parts of n-hexane, 28 parts of octadecyltrichlorosilane, and 18 parts of toluene.

[0047] S1. Synthesis of nanocomposite powder:

[0048] A. Dissolve KH550 in distilled water with stirring, use dilute hydrochloric acid to adjust the pH to 4.5, react at 40°C for 2 hours, and dry in a vacuum tube to obtain amino-terminated hyperbranched polysiloxane;

[0049] B. Mix the nickel ferrite, copper bismuthate, and a...

Embodiment 2

[0062] A graphene-based photocatalyst is formed by grafting nanocomposite powder and modified aerogel, and the mass ratio of nanocomposite powder and modified aerogel is 1:1.

[0063] The dosage of each raw material for preparing the nanocomposite powder is as follows: in parts by weight, 25 parts of amino-terminated hyperbranched polysiloxane, 35 parts of nickel ferrite, and 30 parts of copper bismuthate.

[0064] The dosage of each raw material for preparing the modified aerogel is as follows: in parts by weight, 45 parts of ethyl orthosilicate, 55 parts of graphene oxide, 25 parts of n-hexane, 31 parts of octadecyltrichlorosilane, and 20 parts of toluene.

[0065] S1. Synthesis of nanocomposite powder:

[0066] A. Dissolve KH550 in distilled water with stirring, use dilute hydrochloric acid to adjust the pH value to 5.0, react at 50°C for 2.5h, and vacuum tube drying to obtain amino-terminated hyperbranched polysiloxane;

[0067] B. Mix nickel ferrite, copper bismuthate, a...

Embodiment 3

[0080] A graphene-based photocatalyst is formed by grafting nanocomposite powder and modified aerogel, and the mass ratio of nanocomposite powder and modified aerogel is 5:4.

[0081] The dosage of each raw material for preparing the nanocomposite powder is as follows: in parts by weight, 30 parts of amino-terminated hyperbranched polysiloxane, 45 parts of nickel ferrite, and 32 parts of copper bismuthate.

[0082] The consumption of each raw material for preparing the modified aerogel is as follows: by weight, 50 parts of ethyl orthosilicate, 65 parts of graphene oxide, 30 parts of n-hexane, 34 parts of octadecyl trichlorosilane, and 24 parts of toluene.

[0083] S1. Synthesis of nanocomposite powder:

[0084] A. Dissolve KH550 in distilled water with stirring, use dilute hydrochloric acid to adjust the pH to 5.5, react at 60°C for 3 hours, and dry in a vacuum tube to obtain amino-terminated hyperbranched polysiloxane;

[0085] B. Mix nickel ferrite, copper bismuthate, and a...

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Abstract

The application discloses a graphene-based photocatalyst and a preparation method thereof, belonging to the technical field of photocatalysis. Firstly, the amino-terminated hyperbranched polysiloxane was compounded with copper bismuthate and nickel ferrite to obtain nanocomposite powder; then graphene oxide was placed in silica airgel, and octadecyl trichlorosilane was used to It is modified to obtain a modified airgel; finally, the nanocomposite powder and the modified airgel are compounded to obtain a photocatalyst; After entering the polluted water body, the catalyst can float on the water surface, continuously absorb oil and other pollutants in the water, and carry out photocatalysis through the nano-composite powder loaded on it, so that the pollutants can be decomposed into carbon dioxide and water. The catalyst can effectively reduce the interfacial transport resistance and recombination rate of photogenerated carriers while improving the photocatalytic efficiency. The catalyst is simple in process, easy to recycle, reusable, and very practical.

Description

technical field [0001] The present application relates to the technical field of photocatalysis, in particular to a graphene-based photocatalyst and a preparation method thereof. Background technique [0002] Energy is the material basis for human survival and social development, and the development of human society is inseparable from the promotion of energy. In today's society, traditional fossil energy is still in the leading position in my country's energy structure. As a non-renewable energy, fossil energy continues to The consumption of solar energy will cause human beings to face the problem of resource depletion in the near future. Therefore, the development and utilization of new energy is a top priority for human beings. Among many new energy sources, sunlight has the advantages of being green, environmentally friendly and inexhaustible. get people's attention. [0003] Photocatalysis technology has unique advantages and broad application prospects in the field of n...

Claims

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Application Information

Patent Timeline
26 Oct 2021
Publication
CN112169844B
IPC
B01J31/28; B01J31/02; B01J35/10; C02F1/30; C02F101/36; C02F101/38
CPC
B01J31/28; B01J31/0274; B01J31/0275; C02F1/30; C02F2305/10; C02F2101/308; C02F2101/36; C02F2101/38
Inventors
王新; 黄广晋