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Preparation method and application of CdIn2S4-graphene composite photocatalyst

A graphene composite and photocatalyst technology, which is applied in the field of preparation of CdIn2S4-graphene composite photocatalyst, can solve the problems of narrow energy band gap and low photocatalytic quantum efficiency, achieve simple process, improve photocatalytic activity, and benefit The effect of large-scale preparation

Inactive Publication Date: 2015-08-26
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Ternary sulfide CdIn 2 S 4 Narrow energy band gap, good chemical stability, is considered to be an ideal visible light catalyst, but CdIn 2 S 4 The photocatalytic quantum efficiency is low, which limits its wide application

Method used

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preparation example Construction

[0017] A kind of visible light responsive CdIn of the present invention 2 S 4 -The preparation method of graphene composite photocatalyst, comprises the following steps:

[0018] (1) ultrasonically disperse graphite oxide in reducing alcohol, the concentration of graphite oxide and reducing alcohol is 1mg: 2mL, and the ultrasonic time is 40-60 minutes;

[0019] (2) respectively dissolving cadmium sulfate and indium chloride in equal-volume reducing alcohols and stirring for 20-40 minutes;

[0020] (3) The dispersion liquid that step (1) is made is mixed with the mixture that step (2) makes, add a certain amount of thioacetamide, control the mol ratio of cadmium sulfate, indium chloride and thioacetamide to be 1: 2:8, and stirred for 30-60 minutes;

[0021] (4) Transfer the reaction system of step (3) to a hydrothermal kettle for solvothermal reaction, the reaction temperature is 140-180°C, and the reaction time is 10-24 hours;

[0022] (5) Pour the product of step (4) into...

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Abstract

The invention discloses a preparation method and application of a CdIn2S4-graphene composite photocatalyst with visible-light response. The preparation method comprises the following preparation steps: placing graphite oxide in a reductive alcohol agent for ultrasonic dispersion; adding cadmium sulfate and indium chloride into the reductive alcohol agent and carrying out stirring to dissolve cadmium sulfate and indium chloride; mixing the two obtained systems and adding thioacetamide; transferring the obtained mixture to a hydro-thermal kettle for a reaction; and after completion of the reaction, subjecting the obtained product to vacuum filtration, washing and vacuum drying so as to obtain the CdIn2S4-graphene composite photocatalyst. According to the invention, graphene is used as a carrier and the CdIn2S4-graphene composite photocatalyst is prepared in one step by using a solvothermal method. The composite photocatalyst is mainly applied to conversion and utilization of solar energy, e.g., hydrogen production through photocatalytic water splitting and photocatalytic reduction of CO2.

Description

technical field [0001] The invention belongs to the technical field of new materials and their preparation, and relates to a visible light-responsive CdIn 2 S 4 - Preparation method and application of graphene composite photocatalyst. technical background [0002] All countries in the world are facing energy shortage and environmental pollution in this century, and photocatalytic technology provides the possibility to solve the above problems. The development of new and efficient photocatalytic materials with solar actuation is a central issue. Ternary sulfide CdIn 2 S 4 Narrow energy band gap, good chemical stability, is considered to be an ideal visible light catalyst, but CdIn 2 S 4 The photocatalytic quantum efficiency is low, which limits its wide application. So far, people have improved their photocatalytic activity by controlling the crystal surface morphology and doping (Li Y X, Dillert R, Bahnemann D. Preparation of porous CdIn 2 S 4 photocatalyst films b...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/04C07C67/00C07C69/06
CPCY02E60/36Y02P20/133
Inventor 周民杰阎建辉张娜侯朝辉
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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