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Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof

A technology of visible light and silver phosphate, applied in the fields of nanocomposite materials and photocatalysis, can solve the problems of low degradation rate, slow degradation rate of organic dyes, low utilization rate of visible light, etc. The effect of large-scale promotion

Inactive Publication Date: 2012-07-18
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a graphene oxide / silver phosphate nanocomposite visible light catalyst and its preparation method. The present invention solves the problems of low utilization rate of visible light, slow degradation rate of organic dyes and low degradation rate of existing photocatalysts. Graphene oxide and graphene Ag 3 PO 4 Used in the field of visible light photocatalysis, the preparation method is simple and easy, does not require complicated and expensive equipment, and the synthesis conditions are mild

Method used

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  • Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof
  • Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof
  • Graphene oxide/silver phosphate composite visible light catalyst and preparation method thereof

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Effect test

Embodiment 1

[0020] Take 5 mg of graphene oxide and ultrasonically disperse it in 20 mL of deionized water for 3 hours, add 0.2 g of silver acetate to the above solution; dissolve 1.42 g of disodium hydrogen phosphate in 50 mL of deionized water to obtain phosphoric acid with a concentration of 0.2 mol / L Disodium hydrogen phosphate solution; Add the disodium hydrogen phosphate solution dropwise to the prepared graphene oxide / silver acetate solution under magnetic stirring conditions until yellow turbidity appears in the reaction system; After the dropwise addition, continue stirring at room temperature for 15 minutes, pump filtered, the precipitate was washed several times with deionized water, and dried in vacuo.

Embodiment 2

[0022] Take 20 mg of graphene oxide and ultrasonically disperse it in 20 mL of deionized water for 3 hours, add 0.4 g of silver acetate to the above solution; dissolve 2.84 g of disodium hydrogen phosphate in 50 mL of deionized water to obtain phosphoric acid with a concentration of 0.4 mol / L Disodium hydrogen phosphate solution; Add the disodium hydrogen phosphate solution dropwise to the prepared graphene oxide / silver acetate solution under magnetic stirring conditions until yellow turbidity appears in the reaction system; After the dropwise addition, continue stirring at room temperature for 15 minutes, pump filtered, the precipitate was washed several times with deionized water, and dried in vacuo.

Embodiment 3

[0024] Take 50 mg of graphene oxide and ultrasonically disperse it in 20 mL of deionized water for 4 hours, add 0.6 g of silver acetate to the above solution; dissolve 7.1 g of disodium hydrogen phosphate in 50 mL of deionized water to obtain phosphoric acid with a concentration of 1 mol / L Disodium hydrogen phosphate solution; Add the disodium hydrogen phosphate solution dropwise to the prepared graphene oxide / silver acetate solution under magnetic stirring conditions until yellow turbidity appears in the reaction system; After the dropwise addition, continue stirring at room temperature for 15 minutes, pump filtered, the precipitate was washed several times with deionized water, and dried in vacuo.

[0025] figure 1 The scanning electron microscope picture of the graphene oxide / silver phosphate nanocomposite visible light catalyst prepared for this embodiment, we can clearly see that the obtained silver phosphate is wrapped by a thin layer of graphene oxide from the figure, ...

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Abstract

The invention provides a graphene oxide / silver phosphate composite visible light catalyst and a preparation method of the graphene oxide / silver phosphate composite visible light catalyst, belonging to the technical field of nano-composite material and photocatalysis. The preparation method comprises the following steps of: dissolving graphene oxide in water, and ultrasonically treating to obtain graphene oxide dispersing liquid; adding silver acetate into the graphene oxide dispersing liquid, and evenly stirring, to obtain mixed solution; slowly dropping prepared disodium hydrogen phosphate or sodium dihydrogen phosphate solution into the mixed solution of the graphene oxide and the silver acetate to continuously stir for a while; and repeatedly washing products obtained by reaction with deionized water and absolute ethyl alcohol, and carrying out vacuum drying to obtain the graphene oxide / silver phosphate nano-composite visible light catalyst. The invention has the advantages that the invention is wide in raw material source, and simple in preparation process, the obtained composite material is better in structure and feature, and the prepared nano-composite light catalyst is high-efficiency in degradation effect to the organic dyestuff rhodamine B and the methylene blue under the irradiation of visible light due to the structural advantage.

Description

technical field [0001] The invention relates to a graphene oxide / silver phosphate composite visible light catalyst and a preparation method thereof, belonging to the technical field of nanocomposite materials and photocatalysis. Background technique [0002] With the over-exploitation and utilization of resources and the aggravation of environmental pollution, the available resources of human beings are becoming more and more scarce, and the living environment has been increasingly damaged. Degradation of pollutants is one of the most active fields at present; photocatalysis has broad application prospects and significant social and economic benefits in many fields such as environmental protection, clean energy (solar energy into hydrogen energy), building materials, and textile industry, and has been favored by the scientific community. , government departments and business circles attach great importance to it. [0003] For a long time, photocatalysts based on semiconduct...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J37/10A62D3/10A62D101/26A62D101/28
Inventor 杨小飞刘恒张蓉仙李扬夏娴娴唐华宋浩杰
Owner JIANGSU UNIV
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