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Graphene composite photocatalyst, preparation method and application thereof

A graphene composite and photocatalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve toxicity and other problems, achieve the effect of simple process, open application fields, and cheap reagents

Inactive Publication Date: 2011-01-19
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology

[0006] In view of the above introduction, the purpose of the present invention is to provide a kind of graphene composite photocatalyst, and propose the preparation method and the purposes of this kind graphene composite photocatalyst simultaneously, to solve the problem of preparing graphene by chemically reducing graphene oxide, Technical dilemma requiring use of toxic and strong reducing agents

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  • Graphene composite photocatalyst, preparation method and application thereof
  • Graphene composite photocatalyst, preparation method and application thereof
  • Graphene composite photocatalyst, preparation method and application thereof

Examples

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Embodiment 1

[0025] Using titanium dioxide as a semiconductor photocatalyst, a graphene-wrapped titanium dioxide graphene composite photocatalyst was prepared according to the preparation steps of the graphene composite photocatalyst. The steps are:

[0026] (1) Ultrasonic treatment: under the action of ultrasound, disperse the dioxide powder into 60ml deionized water; then add a certain mass of graphene oxide solution at a mass ratio of 10:1; finally, ultrasonically under the action of an ultrasonic probe Treat for 20 minutes, and the ultrasonic output power is 200W.

[0027] (2) Two-solvent photocatalytic reduction method: in the dispersion prepared in (1), add 40ml of dehydrated alcohol to form a two-solvent system; logical 12 hours of N 2 Drain the dissolved oxygen in the solution; 2 The system was irradiated with a 400W UV-Vis light source. In the photocatalytic reduction reaction, the distance between the light source and the reactor is 20cm, and the optimal illumination time is 9...

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Abstract

The invention belongs to the technical field of photocatalysis, and discloses a graphene composite photocatalyst which is compounded from graphene and a semiconductor photocatalysis material, a preparation method and application thereof. The graphene composite photocatalyst is a composite photocatalysis material with a surface heterogeneous structure and comprises a graphene lamella and the semiconductor photocatalyst packaged by the graphene lamella. The graphene composite photocatalyst is prepared by a double-solvent photocatalytic reduction method adopting deionized water and a reducing alcohol agent, wherein the reduction of the graphene and the formation of a heterogeneous junction structure are finished by one step; the process is simple and convenient; and reagents are cheap. The catalyst has the characteristics of high adsorbability and high photocatalytic oxidative activity, is used for environment improvement and solar conversion and utilization such as air purification, sewage treatment, photocatalytic decomposition of water to prepare hydrogen, photocatalytic reduction of CO2 to synthesize alcohols, hydrocarbon fuels and the like.

Description

Technical field [0001] The invention relates to a composite photocatalytic material, in particular to a composite photocatalyst based on graphene and semiconductor photocatalytic material and its preparation method and use. Background technique [0002] With economic and social development, energy shortage and environmental pollution problems have attracted more and more people's attention. As a green, environmentally friendly, and low-energy-consuming technology, photocatalytic technology has attracted great attention from governments and industries around the world. New high-efficiency photocatalytic materials are one of the keys to the development and application of photocatalytic technology. Photocatalytic technology for environmental management and conversion and utilization of solar energy has gradually attracted the attention and application of countries around the world. [0003] Currently, inorganic semiconductor photocatalysts, such as titanium dioxide (TiO 2 ), ...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J37/16B01J27/24C02F1/58C02F1/30C02F1/72C01B3/02
CPCY02W10/37
Inventor 刘景海陈韦
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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