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Preparation method of composite material of Zn0.8Cd0.2S and graphene

A composite material, graphene technology, applied in chemical instruments and methods, light water/sewage treatment, physical/chemical process catalysts, etc., can solve the problem that photogenerated electrons and holes cannot be effectively separated, limit photocatalytic activity, and reduce adsorption performance. and other problems, to achieve the effect of high photocatalytic activity and stability, improved photocatalytic activity, and simple process

Inactive Publication Date: 2013-09-25
JILIN UNIV
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  • Application Information

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Problems solved by technology

However, due to the large size of pure ZnCdS particles, it is easy to agglomerate during the preparation process, thus reducing its surface area and reducing its adsorption performance, and the photogenerated electrons and holes cannot be effectively separated, which limits its photocatalytic activity.

Method used

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  • Preparation method of composite material of Zn0.8Cd0.2S and graphene
  • Preparation method of composite material of Zn0.8Cd0.2S and graphene
  • Preparation method of composite material of Zn0.8Cd0.2S and graphene

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Embodiment 1

[0029] Embodiment 1: a kind of Zn of the present invention 0.8 CD 0.2 The preparation method of S / graphene (GZCS0.5) composite material, comprises the following steps:

[0030] (1) After mixing zinc acetate dihydrate (329mg) and cadmium acetate dihydrate (120mg) according to the molar ratio of 3.33:1, put them into dimethyl sulfoxide solvent (150mL) and stir for 30 minutes;

[0031] (2) Add 2.25mg of graphene oxide into the mixed solution in step (1), stir and disperse for 60 minutes; 120mg), the ratio of the sum of the weights is 0.5:100, that is, the percentage is 0.5%.

[0032] (3) Transfer the reaction system of step (3) to a 200mL reactor, and react at 180°C for 12 hours;

[0033] (4) Pour the product of step (4) into a centrifuge (5000 rpm) for centrifugation, wash with ethanol and deionized water, and vacuum dry at 60°C for 8 hours, then grind to obtain graphene oxide and Zn 0.8 Cd 0.2 S precursor with 0.5% Zn by weight 0.8 Cd 0.2 S / graphene composite (GZCS0.5).

Embodiment 2

[0035] Change the amount of graphene oxide in step (3) of embodiment 1 to 11 mg, and the rest of the steps are the same as in embodiment 1 to obtain graphene oxide and Zn 0.8 Cd 0.2 S precursor with 2.5% Zn by weight 0.8 Cd 0.2 S / graphene composites (GZCS2.5).

Embodiment 3

[0037] Change the amount of graphene oxide in step (3) of Example 1 to 22.5 mg, and the rest of the steps are the same as in Example 1 to obtain graphene oxide and Zn 0.8 Cd 0.2 S precursor with 5.0% Zn by weight 0.8 Cd 0.2 S / graphene composites (GZCS5.0).

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Abstract

The invention discloses a preparation method of a composite material of Zn0.8Cd0.2S and graphene, and belongs to the technical field of preparation of the composite material of a photocatalyst. The method comprises the following steps of: taking graphene oxide as an initial bearing material, zinc acetate dehydrate and cadmium acetate dehydrate as precursors for preparing Zn0.8Cd0.2S nano particles, and dimethyl sulfoxide as a sulphur source and a reducing agent; and achieving preparation of the Zn0.8Cd0.2S, reduction of the graphite oxide and composition of the Zn0.8Cd0.2S / graphene in one step by adopting a solvent thermal technology, so as to prepare the composite photocatalyst with visible light response. The composite material disclosed by the invention is simple and convenient in preparation method; the composite material of the Zn0.8Cd0.2S / graphene can be synthesized in one step; meanwhile, the graphene oxide is effectively reduced into the graphene; the product Zn0.8Cd0.2S particles are small and evenly distributed on the graphene, and display wide visible light response and high photocatalytic activity; and the degradation rate on methylthionine chloride under the optimal condition achieves 96%.

Description

Technical field: [0001] The invention relates to the technical field of preparing a photocatalyst composite material responding to visible light. It specifically involves using a solvothermal method to deposit nano-Zn particles with uniform particle size and uniform dispersion on the surface of graphene, a support material. 0.8 CD 0.2 Composite catalyst preparation technology of S particles. Background technique: [0002] With the rapid development of the economy, the problems of energy shortage and environmental pollution have become increasingly prominent, and the application of photocatalytic technology as a green energy technology to environmental pollution has attracted widespread attention of scientists. New high-efficiency photocatalytic materials are one of the keys to the development and application of photocatalytic technology. However, most of the photocatalytic materials have a large band gap, and the photocatalytic reaction requires high energy excitation. Th...

Claims

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Application Information

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IPC IPC(8): B01J27/04C02F1/30
Inventor 郑伟涛王新伟田宏伟
Owner JILIN UNIV
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