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Preparation method of a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst

A technology of hierarchical structure and photocatalyst, applied in the field of photocatalysis, can solve the problems of small specific surface area, large energy consumption, small size and easy agglomeration, etc., and achieves the effect of high-efficiency photocatalytic performance, favorable for recycling and low cost.

Active Publication Date: 2017-03-08
湖州优研知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these Bi 2 WO 6 The material method not only needs to consume a lot of energy, but also the obtained product has a small specific surface area and a large size, which is not conducive to the improvement of photocatalytic properties.
In order to improve the defects of solid-phase synthesis, the preparation of Bi by soft chemical method was recently reported. 2 WO 6 Nanomaterials, but in the actual photocatalytic process, photocatalyst nanopowders have disadvantages such as small size and easy agglomeration, which are not conducive to repeated recycling.

Method used

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  • Preparation method of a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst
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  • Preparation method of a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst

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Embodiment example 1

[0021] Embodiment example 1: a method for preparing a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst of the present invention, the specific preparation process is:

[0022] (1) Dissolve 1mmol of bismuth nitrate in 5mL of 2M dilute nitric acid aqueous solution to form a transparent solution A, dissolve the metered ratio of sodium tungstate in 20mL of deionized water, and slowly add it to solution A, stir for 0.5h to form The solution of is recorded as B solution;

[0023] (2) Dissolve 0.5g of sodium sulfate in 10mL of deionized water, slowly add it into solution B, continue to stir for 0.5h, then transfer it to a 50mL stainless steel autoclave lined with polytetrafluoroethylene, and react at 180°C for 15h. The obtained product was centrifuged, washed, and vacuum-dried at 60° C. to obtain a wheel-shaped three-dimensional hierarchical bismuth tungstate photocatalyst.

[0024] The morphology of the prepared bismuth tungstate samples was char...

Embodiment 2

[0025] Implementation example 2: the preparation method of a kind of wheel shape three-dimensional hierarchical structure bismuth tungstate photocatalyst of the present invention, concrete preparation process is:

[0026] (1) Dissolve 1mmol of bismuth chloride in 5mL of 2M dilute hydrochloric acid aqueous solution to form a transparent solution A, dissolve the metered ratio of sodium tungstate in 20mL of deionized water, and slowly add it to the A solution, stir for 0.5h, The solution that forms is denoted as B solution;

[0027] (2) Dissolve 1g of sodium sulfate in 10mL of deionized water, slowly add it into solution B, continue to stir for 0.5h, then transfer it to a 50mL stainless steel autoclave lined with polytetrafluoroethylene, and react at 180°C for 15h. The product was centrifuged, washed, and vacuum-dried at 50°C to obtain a wheel-shaped three-dimensional hierarchical structure sodium tungstate photocatalyst.

Embodiment 3

[0028] Implementation example 3: the preparation method of a kind of wheel shape three-dimensional hierarchical structure bismuth tungstate photocatalyst of the present invention, concrete preparation process is:

[0029] (1) Dissolve 1mmol of bismuth nitrate in 5mL of 2M dilute nitric acid aqueous solution to form a transparent solution A, dissolve the metered ratio of ammonium tungstate in 20mL of deionized water, and slowly add it to solution A, stir for 0.5h to form The solution of is recorded as B solution;

[0030] (2) Dissolve 2g of ammonium sulfate in 10mL of deionized water, slowly add it into solution B, continue to stir for 0.5h, then transfer it to a 50mL stainless steel autoclave lined with polytetrafluoroethylene, and react at 180°C for 16h. The product was centrifuged, washed, and vacuum-dried at 50°C to obtain a wheel-shaped three-dimensional hierarchical bismuth tungstate photocatalyst.

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Abstract

The invention discloses a preparation method of a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst, and belongs to the field of photocatalysis. Its main feature is that it uses bismuth salt, tungsten salt, and sulfate as the main raw materials, and obtains a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst through a simple hydrothermal method. The prepared catalyst has efficient visible light catalytic activity. The preparation steps are: ① Dissolve the bismuth salt in a certain concentration of nitric acid solution, then mix it with the tungsten salt solution in a measured ratio, and stir evenly. ② Prepare a certain concentration of sulfate aqueous solution, slowly add it to the solution obtained in step ①, stir thoroughly and then put it into a reaction kettle for hydrothermal reaction. Wash, centrifuge and dry the obtained product to obtain wheel-shaped bismuth tungstate light. catalyst. This method has simple process and low cost, and the prepared wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst has high visible light catalytic activity.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to the preparation of a wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalytic material by using a hydrothermal method. Through the regulation and control of the type and amount of raw materials, the production of the wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalytic material can be realized. The preparation is successful, and the obtained wheel-shaped three-dimensional hierarchical structure bismuth tungstate photocatalyst has high-efficiency visible light catalytic activity. Background technique [0002] The control of environmental pollution is the focus of human beings today and needs to be solved urgently, especially the environmental problems caused by toxic and refractory organic pollutants (such as halogenated substances, pesticides, dyes, etc.) have become a major issue affecting human survival and health. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00B01J23/31
CPCC01G41/00B01J23/31C01P2004/03C01P2002/72B01J35/39
Inventor 段芳张琴魏取福陈明清施冬健倪忠斌
Owner 湖州优研知识产权服务有限公司