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Preparation method capable of controlling oriented growth of bismuth oxybromide photocatalysts

A technology of photocatalyst and bismuth oxybromide, applied in the field of photocatalysis, can solve the problems of easy recombination and low photocatalytic efficiency, and achieve the effects of simple process, low cost and easy operation

Active Publication Date: 2015-01-07
浙江三行电气科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key to photocatalytic technology lies in the photocatalyst, with TiO 2 The representative traditional photocatalytic materials have a wide band gap, can only be excited by ultraviolet light, and the photogenerated electron-hole pairs are easy to recombine, resulting in low photocatalytic efficiency.

Method used

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  • Preparation method capable of controlling oriented growth of bismuth oxybromide photocatalysts
  • Preparation method capable of controlling oriented growth of bismuth oxybromide photocatalysts
  • Preparation method capable of controlling oriented growth of bismuth oxybromide photocatalysts

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Embodiment example 1

[0020] Embodiment example 1: a kind of preparation method of controlling bismuth oxybromide photocatalyst orientation growth of the present invention, concrete preparation process is:

[0021] Dissolve 2mmol of bismuth nitrate in 5mL of glacial acetic acid to form a transparent solution A; dissolve 2mmol of potassium bromide in 10mL of deionized water, slowly add to solution A, continue to stir for 0.5h, and then transfer to 50mL of polytetrafluoroethylene In a lined stainless steel autoclave, react at 160°C for 12h, centrifuge the obtained product, and dry it in vacuum at 50°C to obtain bismuth oxybromide photocatalyst BiOBr-1.

Embodiment 2

[0022]Implementation example 2: a kind of preparation method of controlling bismuth oxybromide photocatalyst orientation growth of the present invention, concrete preparation process is:

[0023] Dissolve 2mmol of bismuth nitrate in 5mL of glacial acetic acid to form a transparent solution A; dissolve 0.1g of PVP in 20mL of deionized water, and slowly add it to solution A, stir for 0.5h, and record the formed solution as solution B; Dissolve potassium bromide in 10mL 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, react at 160°C for 12h, and centrifuge the obtained product , and dried under vacuum at 50°C to obtain bismuth oxybromide photocatalyst BiOBr-2.

Embodiment 3

[0024] Implementation example 3: a kind of preparation method of controlling bismuth oxybromide photocatalyst orientation growth of the present invention, concrete preparation process is:

[0025] Dissolve 2mmol of bismuth nitrate in 5mL of glacial acetic acid to form a transparent solution A; dissolve 0.5g of PVP in 20mL of deionized water, slowly add it to solution A, stir for 0.5h, and record the formed solution as solution B; Dissolve potassium bromide in 10mL 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, react at 160°C for 12h, and centrifuge the obtained product , and dried under vacuum at 50°C to obtain bismuth oxybromide photocatalyst BiOBr-3.

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Abstract

The invention discloses a preparation method capable of controlling oriented growth of bismuth oxybromide photocatalysts and belongs to the field of photocatalysis. The preparation method is mainly characterized in that bismuth salt, bromide, glacial acetic acid and polyvinylpyrrolidone (PVP) are taken as raw materials, the added amounts of glacial acetic acid and PVP are controlled, the bismuth oxybromide photocatalysts with different growth orientations are obtained by virtue of a simple hydrothermal method, and photocatalytic performance of the bismuth oxide bromide photocatalysts are compared. The preparation method is simple in technology and low in cost, and the prepared bismuth oxybromide photocatalysts with different growth orientations have different visible light catalytic activities.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to the preparation of bismuth oxybromide photocatalytic materials by using a hydrothermal method. By controlling the amount of raw materials added, the regulation and control of the growth orientation of bismuth oxybromide can be realized, and the prepared bismuth oxybromide photocatalysts grown in different orientations have Different visible light photocatalytic properties. 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 purification of organic pollutants by photocatalytic technology has attracted much attention due to its advantages of low energy consumption, mild purification conditions, ...

Claims

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Application Information

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IPC IPC(8): B01J27/08C01G29/00
Inventor 段芳汪晓凤王军施冬健魏取福陈明清
Owner 浙江三行电气科技有限公司
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