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Graphene oxide/titanium dioxide composite photocatalysis material and preparation method thereof

A technology of composite photocatalysis and titanium dioxide, applied in the field of photocatalysis, can solve the problems of low photocatalysis efficiency of green and environment-friendly catalysts, and achieve the effect of improving the photocatalytic reaction rate

Inactive Publication Date: 2012-04-25
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of low photocatalytic efficiency of green and environment-friendly catalysts

Method used

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  • Graphene oxide/titanium dioxide composite photocatalysis material and preparation method thereof
  • Graphene oxide/titanium dioxide composite photocatalysis material and preparation method thereof
  • Graphene oxide/titanium dioxide composite photocatalysis material and preparation method thereof

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Embodiment Construction

[0022] A graphene oxide / titanium dioxide composite photocatalytic material, the composite photocatalytic material structure: titanium dioxide is distributed on the upper and lower surfaces and edge regions of the graphene oxide material, forming a nano-scale titanium dioxide uniformly dispersed in the micron-scale graphene oxide sheet Composite photocatalytic materials.

[0023] A graphene oxide / titanium dioxide composite photocatalytic material and one of the preparation methods thereof include:

[0024] Step 1 makes graphene oxide into an aqueous suspension with a mass concentration of 0.1g / L;

[0025] Step 2 Slowly add polyethylene glycol, glacial acetic acid and tetrabutyl titanate to absolute ethanol in sequence under the condition of a stirring speed of 50r / min to form a mixed solution, and its mass concentration is as follows: polyethylene glycol 2.5g / L, glacial acetic acid 0.3g / L, tetrabutyl titanate 0.1g / L;

[0026] Step 3: Take 2ml of the graphene oxide aqueous su...

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Abstract

The invention relates to a graphene oxide / titanium dioxide composite photocatalysis material and a preparation method thereof, and belongs to the technical field of photocatalysis. The material of the present invention is applicable for catalytic degradation of pollutants. With the present invention, the problem of low photocatalysis efficiency of the catalyst is solved. The structure of the composite photocatalysis material is that: nano-scale titanium dioxide is uniformly dispersed in micron graphene oxide lamellas to form the composite photocatalysis material. The preparation method for the composite photocatalysis material comprises: 1, preparing the graphene oxide into an aqueous suspension; 2, sequentially and slowly adding polyethylene glycol, glacial acetic acid and tetrabutyl titanate to dehydrated alcohol under a stirring condition to prepare into a mixing solution; 3, adding the prepared graphene oxide aqueous suspension from the step 1 to the prepared mixing solution from the step 2 in a dropwise manner, stirring at a uniform speed at a room temperature to form a mixed solution; 4, drying the mixed solution from the step 3 to obtain the solid mixture; 5, placing the obtained solid mixture from the step 4 to a container, carrying out calcination under the protection of inert gas to obtain the graphene oxide / titanium dioxide composite photocatalyst.

Description

technical field [0001] The invention relates to a photocatalytic composite material and a preparation method thereof, which belongs to the technical field of photocatalysis and is suitable for catalytic degradation of inorganic and organic pollutants. Background technique [0002] In recent years, problems such as energy crisis and environmental pollution have become increasingly serious, and countries all over the world have attached great importance to energy conservation and environmental protection. Photocatalysis is considered to be an environmental pollution purification technology with wide application prospects because of its room temperature reaction and the ability to directly use solar energy for catalytic degradation. Since Fujishima and Honda discovered that anatase titanium dioxide can effectively purify sewage in 1972, titanium dioxide as a green catalyst has attracted people's attention and has been widely studied. However, the photogenerated carriers of tit...

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Application Information

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IPC IPC(8): B01J21/18A62D3/10A62D101/28
Inventor 何大伟王永生杨冰洋王闻硕富鸣张慧
Owner BEIJING JIAOTONG UNIV
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