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Preparation method of cadmium sulfide self-doped titanium dioxide composite catalyst

A composite catalyst, titanium dioxide technology, used in physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc., can solve the problems of poor photocatalytic decomposition of H2S activity, insufficient light absorption utilization rate, etc.

Active Publication Date: 2020-12-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of insufficient light absorption utilization rate of traditional photocatalysts and poor activity of photocatalytic decomposition of H2S, and a preparation method of cadmium sulfide self-doped titanium dioxide composite photocatalyst is provided

Method used

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  • Preparation method of cadmium sulfide self-doped titanium dioxide composite catalyst
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  • Preparation method of cadmium sulfide self-doped titanium dioxide composite catalyst

Examples

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Embodiment 1

[0077] 1. Preparation of cadmium sulfide self-doped titanium dioxide composite photocatalyst

[0078] (1) Add 5ml of tetrabutyl titanate to 15ml of absolute ethanol, stir and mix evenly (weight ratio is 2.5) to obtain solution A;

[0079] (2) Cadmium acetate, water, nitric acid and ethanol are mixed uniformly to obtain solution B, wherein the Ti element is counted as titanium dioxide, and the Cd element is counted as CdS, and the weight ratio of the two is 20%; the weight ratio of tetrabutyl titanate to ethanol is 2.5, and the mol ratios of water to tetrabutyl titanate and tetrabutyl titanate to nitric acid are 2.8 and 3.7 respectively;

[0080] (3) Drop solution B into solution A and stir for 30 minutes to obtain mixed solution C;

[0081] (4) Add thiourea to mixed solution C, stir for 30 minutes to obtain mixed solution D, wherein the molar ratio of thiourea to cadmium acetate is 1.5;

[0082] (5) Add the sodium borohydride powder to the mixed liquid D under stirring, and ...

Embodiment 2

[0089] 1. Preparation of cadmium sulfide self-doped titanium dioxide composite photocatalyst

[0090] (1) Add 5ml of tetrabutyl titanate to 15ml of absolute ethanol, stir and mix evenly (weight ratio is 2.5) to obtain solution A;

[0091] (2) Cadmium acetate, water, nitric acid and ethanol are mixed uniformly to obtain solution B, wherein the Ti element is counted as titanium dioxide, and the Cd element is counted as CdS, and the weight ratio of the two is 10%; the weight ratio of tetrabutyl titanate to ethanol is 2.5, and the mol ratios of water to tetrabutyl titanate and tetrabutyl titanate to nitric acid are 2.8 and 3.7 respectively;

[0092] (3) Drop solution B into solution A and stir for 30 minutes to obtain mixed solution C;

[0093] (4) Add thiourea to mixed solution C, stir for 30 minutes to obtain mixed solution D, wherein the molar ratio of thiourea to cadmium acetate is 1.5;

[0094] (5) Add sodium borohydride powder to mixed solution D under stirring, and mix un...

Embodiment 3

[0099] 1. Preparation of cadmium sulfide self-doped titanium dioxide composite photocatalyst

[0100] (1) Add 5ml of tetrabutyl titanate to 15ml of absolute ethanol, stir and mix evenly (weight ratio is 2.5) to obtain solution A;

[0101] (2) Cadmium acetate, water, nitric acid and ethanol are mixed uniformly to obtain solution B, wherein the Ti element is counted as titanium dioxide, and the Cd element is counted as CdS, and the weight ratio of the two is 30%; the weight ratio of tetrabutyl titanate to ethanol is 2.5, and the mol ratios of water to tetrabutyl titanate and tetrabutyl titanate to nitric acid are 2.8 and 3.7 respectively;

[0102] (3) Drop solution B into solution A and stir for 30 minutes to obtain mixed solution C;

[0103] (4) Add thiourea to mixed solution C, stir for 30 minutes to obtain mixed solution D, wherein the molar ratio of thiourea to cadmium acetate is 1.5;

[0104] (5) Add sodium borohydride powder to mixed solution D under stirring, and mix un...

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Abstract

The invention relates to a preparation method of a cadmium sulfide self-doped titanium dioxide composite catalyst, which mainly solves the problems of insufficient light absorption and utilization rate and poor H2S photocatalytic decomposition activity of the traditional photocatalyst, and comprises the following steps that a mixed solution E is formed by mixing titanate, low-carbon alcohol, cadmium salt, water, a non-mandatory titanate hydrolysis inhibitor, an organic sulfur compound capable of being hydrolyzed to generate negative divalent sulfur and alkali metal borohydride. According to the technical scheme in which the mixed solution E is subjected to solvothermal reaction, the technical problem is better solved, and the preparation method can be used for production of the cadmium sulfide self-doped titanium dioxide composite photocatalyst.

Description

technical field [0001] The invention relates to a preparation method of cadmium sulfide self-doped titanium dioxide composite photocatalyst. Background technique [0002] Hydrogen sulfide (H 2 S) is a kind of poisonous acid gas that will be produced in large quantities in petrochemical and chemical synthesis processes. It will not only cause corrosion of chemical equipment and deactivation of metal catalysts, cause environmental pollution, but also endanger human life. The Claus process is widely used in industry to treat hydrogen sulfide gas. This process consumes a lot of energy, easily causes secondary pollution, and hydrogen resources have not been effectively recycled. [0003] Photocatalytic technology can use sunlight energy to transform H under the action of semiconductor photocatalyst 2 S decomposition and mild reaction conditions not only solve the problem of environmental pollution, but also make rational use of hydrogen resources, so that solar energy can be co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCB01J27/04C01B3/04B01J35/39Y02E60/36
Inventor 高晓晨朱桂莲韩笑柏诗哲高焕新
Owner CHINA PETROLEUM & CHEM CORP
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