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Preparation method of tin dioxide/bismuth tungstate composite photocatalyst

A technology of tin dioxide and bismuth tungstate, which is applied in botany equipment and methods, biocides, disinfectants, etc., can solve the problems of poor catalytic effect of photocatalysts and low utilization rate of sunlight, and achieve excellent catalytic performance, The preparation method is simple and the cost is low

Inactive Publication Date: 2013-03-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method of tin dioxide / bismuth tungstate composite photocatalyst, the photocatalytic activity of this composite photocatalyst has bigger improvement with respect to pure bismuth tungstate, has solved the catalytic effect of existing photocatalyst Not good, the problem of low utilization rate of sunlight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 4.85g bismuth nitrate pentahydrate in 24.25g nitric acid solution with a concentration of 65%; dissolve 15.21g ammonium tungstate solution in 30.42g sodium hydroxide solution with a concentration of 5mol / L; mix the above two solutions evenly and add 25mL The tin chloride pentahydrate solution with a concentration of 0.1mol / L was moved to a hydrothermal reaction kettle, placed in a microwave reactor and heated to 150°C for microwave hydrothermal treatment for 0.5h, taken out and cooled naturally to room temperature, and the obtained The product was separated by centrifugation, washed three times with deionized water, and dried at 80° C. for 12 hours to obtain tin dioxide / bismuth tungstate composite photocatalyst powder.

Embodiment 2

[0025] Dissolve 4.85g bismuth nitrate pentahydrate in 48.5g nitric acid solution with a concentration of 65%; dissolve 15.21g ammonium tungstate solution in 76.05g sodium hydroxide solution with a concentration of 5mol / L; mix the above two solutions evenly and add 25mL The tin chloride pentahydrate solution with a concentration of 0.1mol / L was moved to a hydrothermal reaction kettle, placed in a microwave reactor and heated to 150°C for microwave hydrothermal treatment for 0.5h, taken out and cooled naturally to room temperature, and the obtained The product was separated by centrifugation, washed three times with deionized water, and dried at 80° C. for 12 hours to obtain tin dioxide / bismuth tungstate composite photocatalyst powder.

Embodiment 3

[0027] Dissolve 4.85g bismuth nitrate pentahydrate in 24.25g nitric acid solution with a concentration of 65%; dissolve 15.21g ammonium tungstate solution in 30.42g sodium hydroxide solution with a concentration of 5mol / L; mix the above two solutions evenly and add 25mL The tin chloride pentahydrate solution with a concentration of 0.01mol / L was moved to a hydrothermal reaction kettle, placed in a microwave reactor and heated to 150°C for microwave hydrothermal treatment for 0.5h, taken out and naturally cooled to room temperature, and the obtained The product was separated by centrifugation, washed three times with deionized water, and dried at 80° C. for 12 hours to obtain tin dioxide / bismuth tungstate composite photocatalyst powder.

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Abstract

The invention discloses a preparation method of a tin dioxide / bismuth tungstate composite photocatalyst. The composite photocatalyst is powder containing tin dioxide and bismuth tungstate, wherein the molar ratio of tin dioxide to bismuth tungstate is 1:2-20. The preparation method of the composite photocatalyst comprises the following steps: 1, mixing a nitric acid solution of bismuth nitrate pentahydrate, a sodium hydroxide solution of ammonium tungstate and a tin chloride pentahydrate solution; and 2, preparing the tin dioxide / bismuth tungstate composite photocatalyst by adopting a microwave-assisted heating hydrothermal method. The preparation method of the invention has the advantages of simplicity and low cost; and the prepared composite photocatalyst which has excellent catalytic performances can decompose harmful chemical substances and organic biomasses and has a sterilization effect under the irradiation of visible lights.

Description

technical field [0001] The invention belongs to the technical field of inorganic environment-friendly photocatalytic materials, and relates to a preparation method of a composite photocatalyst, in particular to a preparation method of a tin dioxide / bismuth tungstate composite photocatalyst. Background technique [0002] The use of photocatalytic technology to degrade environmental pollutants has the characteristics of deep reaction at room temperature and direct use of solar energy as a light source to drive the reaction. It has become an ideal environmental pollution control technology and has attracted much attention. In recent years, semiconductor photocatalysis has become one of the research hotspots in the environmental field. A large number of studies have shown that almost all organic pollutants can be effectively photocatalytically degraded, decolorized, and mineralized into small inorganic molecules, thereby eliminating environmental pollution. and hazards. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/31A62D3/10A01N59/16A01P1/00
Inventor 李军奇朱振峰刘辉何选盟王德方郭占云
Owner SHAANXI UNIV OF SCI & TECH