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Preparation method of ZnO/graphene photocatalyst

A photocatalyst, graphene technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Agglomeration and other problems, to achieve the effect of improving catalytic activity and stability, using less raw materials, and enhancing adsorption

Inactive Publication Date: 2015-01-14
湖南元素密码石墨烯高科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

For example, some preparation methods have cumbersome steps, use more raw materials, and have higher costs. The reduced graphene is easy to reunite due to van der Waals force, which is not conducive to the improvement of photocatalytic activity, etc.

Method used

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with specific embodiments.

[0026] A preparation method of ZnO / graphene photocatalyst, comprises the following steps:

[0027] (1) Configure growth solution: add 0.1mol / L Zn(NO 3 ) 2 ·6H 2 Slowly add aqueous ammonia to the O solution until the white precipitate is completely dissolved;

[0028] (2) Configure seed liquid: add 0.001mol / L Zn(NO 3 ) 2 ·6H 2 Slowly add aqueous ammonia to the O solution until the white precipitate is completely dissolved;

[0029] (3) Preparation of ZnO / graphene:

[0030] a. Add an appropriate amount of graphene oxide to the seed liquid, heat it to 80°C for 30 minutes, wash and filter, dry at 120°C for 1 hour, and set aside; the graphene oxide is prepared from graphite powder by the improved Hummers' method Obtained by oxidation;

[0031] b. Place the dried sample in the growth solution, heat it to 80°C for 1 hour, rinse and dry to obtain ZnO / graphene oxi...

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Abstract

The invention provides a preparation method of a ZnO / graphene photocatalyst. The preparation method comprises the following steps: (1) preparing growth-promoting liquid; (2) preparing seed crystal liquid; and (3) preparing ZnO / graphene: a, adding a proper amount of graphene oxide into the seed crystal liquid and heating to 80-90 DEG C, then preserving the heat for 30 minutes; washing and filtering, and drying at 120 DEG C for 1-2 hours for later use; b, putting a dried sample into the growth-promoting liquid and heating to 80-90 DEG C, then preserving the heat for one hour, washing and drying to obtain ZnO / graphene oxide; and c, putting the prepared ZnO / graphene oxide into an atmosphere reduction furnace and heating to 1000-1100 DEG C to be reduced for one hour under the protection of carrier gas, thereby finally obtaining the ZnO / graphene photocatalyst. The preparation method of the ZnO / graphene photocatalyst is simple in steps and low in cost; and the catalytic activity and the stability of the obtained ZnO / graphene photocatalyst are greatly improved and the ZnO / graphene photocatalyst is hopeful to be applied to photocatalysis treatment of industrial pollutants.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst, in particular to a method for preparing a ZnO / graphene photocatalyst. Background technique [0002] The research on photocatalytic degradation of organic pollutants in water and air has become a hotspot in the field of environmental science. Semiconductor photocatalysts are non-toxic and can degrade a wide range of pollutants at relatively mild temperatures and pH. So far, TiO 2 It is considered as one of the best semiconductor photocatalysts. However, studies have shown that ZnO has high photosensitive properties, wide band gap (3.37eV) and large exciton energy (60meV), and has shown special value in degrading some pollutants, such as bleached pulp Plant sewage, phenol and 2-phenylphenol, etc.; moreover, ZnO has the same properties as TiO 2 The same photodegradation mechanism. [0003] However, due to its own bandgap, the generated electron-hole pairs are easy to recombine quickly, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06
Inventor 谭彬龙笃湘马锦彭敏莉
Owner 湖南元素密码石墨烯高科技有限公司
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