Method for preparing nanometer indium cadmium sulfide-indium hydroxide composite photocatalyst

A technology of indium cadmium sulfide and indium hydroxide, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low equilibrium conversion rate, low catalyst loading rate, and narrow semiconductor light absorption wavelength range etc. to achieve the effect of simple operation, high photocatalytic activity and simple process

Inactive Publication Date: 2014-07-23
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] The catalytic efficiency of various photocatalysts currently developed is low, the light absorption wavelength range of semiconductors is narrow (mainly in the ultraviolet region), the equilibrium conversion rate is low, and the loading rate of two or more catalysts is low due to morphology problems. In addition,

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  • Method for preparing nanometer indium cadmium sulfide-indium hydroxide composite photocatalyst
  • Method for preparing nanometer indium cadmium sulfide-indium hydroxide composite photocatalyst
  • Method for preparing nanometer indium cadmium sulfide-indium hydroxide composite photocatalyst

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Embodiment

[0025] A method for preparing a nano-indium cadmium sulfide-indium hydroxide composite photocatalyst, which is prepared by a hydrothermal method, and the steps are as follows:

[0026] 1) Add 0.35g of indium chloride, 0.14g of cadmium chloride and 0.35g of thiourea into 55mL of deionized water and stir vigorously for 15 minutes to obtain a mixed solution;

[0027] 2) Move the above mixed solution into a hydrothermal kettle, then place the hydrothermal kettle in an oven for constant temperature crystallization at 140°C, and the time for constant temperature crystallization is 16h, 32h, and 48h;

[0028] 3) Take out the hydrothermal kettle after the constant temperature reaction is over, and discard the supernatant after cooling to room temperature;

[0029] 4) Collect the precipitate in the kettle, and wash it with absolute ethanol and deionized water for 3 times to remove the impurities in the precipitate;

[0030] 5) Dry the washed precipitate at a constant temperature of 8...

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Abstract

The invention relates to a method for preparing a nanometer indium cadmium sulfide-indium hydroxide composite photocatalyst. The chemical formula of the composite photocatalyst is CdIn2S4-In(OH)3. The catalyst is prepared from indium chloride, cadmium chloride, thiourea and deionized water by a hydrothermal method. According to the XRD (X-Ray Diffraction) spectrogram of the catalyst, along with the prolonging of hydrothermal time, the diffraction peak of In(OH)3 of a sample is gradually weakened and the diffraction peak of CdIn2S4 is gradually enhanced to form the CdIn2S4-In(OH)3 composite photocatalyst; no other impurity peak is found in the spectrogram. The method disclosed by the invention has the advantages that the method is simple in process and simple and convenient in operation; the obtained composite photocatalyst has very high photocatalytic activity and is used for performing catalytic reduction on CO2 to obtain methyl formate under the irradiation of ultraviolet light by taking methanol as a solvent, CO2 can be effectively reduced into organic ester and the green conversion is realized.

Description

technical field [0001] The invention relates to a preparation technology of a composite photocatalyst, in particular to a preparation method of a nanometer indium cadmium sulfide-indium hydroxide composite catalyst. Background technique [0002] Photocatalytic reduction of CO 2 It is a photocatalyst that converts light energy into electrical energy by using the photoelectric effect under the irradiation of light. Compared with other methods, it has more advantages. The reaction can not only be carried out at normal temperature and pressure, but also the use of clean energy sunlight will not produce excess CO during the reaction 2 . Sulfide semiconductor nanomaterials with different properties were prepared by a simple hydrothermal method and a solvent method, and they were used as photocatalysts to reduce CO with methanol as a solvent. 2 , convert it into organic products with high added value such as HCOOH, HCHO, CH 3 OH, CH 4 and other substances, so as to eliminate C...

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Application Information

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IPC IPC(8): B01J27/04
Inventor 尹晓红马帅华蒋万林王斌刘勇李霞
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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