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Bismuth oxyhalide photocatalyst and preparation method thereof

A bismuth oxyhalide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as secondary pollution

Active Publication Date: 2014-06-25
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since a very important element for the photocatalytic oxidation technology is the photocatalyst, the most studied photocatalyst is titanium dioxide, but due to its large band gap, low utilization rate of visible light, and high recombination rate of photogenerated electron-hole pairs, it is limited. further application

Method used

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  • Bismuth oxyhalide photocatalyst and preparation method thereof
  • Bismuth oxyhalide photocatalyst and preparation method thereof
  • Bismuth oxyhalide photocatalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0017] Dissolve 0.001 mol of sodium bromide in 70 mL of deionized water, and add 0.001 mol of sodium bismuthate. Adjust pH=1.16. Place in a 100 mL polytetrafluoroethylene reactor and react at 180°C for 24 h. After the reaction is complete, the resulting precipitate is suction-filtered, washed with alcohol and water respectively, and dried at 60°C for 4 h.

Embodiment 2

[0019] Take 0.001 mol of cetylpyridine bromide and dissolve it in 70 mL of deionized water, and add 0.001 mol of sodium bismuthate. Adjust pH=1.06. Place in a 100 mL polytetrafluoroethylene reactor and react at 180°C for 12 h. After the reaction is complete, the resulting precipitate is suction-filtered, washed with alcohol and water respectively, and dried at 60°C for 4 h.

Embodiment 3

[0021] Dissolve 0.001 mol of cetyltrimethylammonium bromide in 70 mL of deionized water, dissolve it by ultrasonication, and add 0.001 mol of sodium bismuthate. Adjust pH=1.26. Place in a 100 mL polytetrafluoroethylene reactor and react at 160°C for 12 h. After the reaction is complete, filter the resulting precipitate with suction, wash with alcohol and water respectively, and dry at 60°C for 4 h.

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Abstract

The invention relates to a bismuth oxyhalide photocatalyst. According to a method for preparing bismuth oxyhalide photocatalyst, sodium bismuthate is used as the bismuth source, and sodium halide or potassium bromate or cetyl trimethyl ammonium chloride or halogenated cetylpyridinium or tetrabutyl ammonium halide is used as the halogen source; the halogen source is added into deionized water and mixed for 20 minutes for dissolution under the ultrasonic condition, and then sodium bismuthate is added into the halogen source for pH adjustment; the mixed solution is put into a reaction kettle for reaction, and the halogen source is marked as follows according to the bromine source: sodium halide (BiOBrNaBr), potassium bromated (BiOBrKBrO3), cetyl trimethyl ammonium chloride (BiOBrCTAB), halogenated cetylpyridinium (BiOBrCPB) and tetrabutyl ammonium halide (BiOBrTBB). The bismuth oxyhalide photocalyst is applied to visible light sensitization or degradation of rhodamine B (RhB) and salicylic acid (SA); the bismuth oxyhalide photocalyst has good stability and photocatalytic activity, and meanwhile, the preparation process is simple and the cost is low.

Description

technical field [0001] The invention relates to a photocatalyst bismuth oxyhalide responsive to visible light and a preparation method thereof, which is applied to degrade toxic organic pollutants in the environment. Background technique [0002] Photocatalytic oxidation technology is a new type of chemical oxidation treatment method, which can successfully solve the defects of secondary pollution caused by other advanced oxidation methods to remove toxic organic compounds in water bodies. The light source removes most of the organic matter and other advantages. Since a very important element for the photocatalytic oxidation technology is the photocatalyst, the most studied photocatalyst is titanium dioxide, but due to its large band gap, low utilization rate of visible light, and high recombination rate of photogenerated electron-hole pairs, it is limited. further applications. Bismuth-based photocatalysts have good catalytic performance, especially obvious absorption in ...

Claims

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Application Information

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IPC IPC(8): B01J27/06C01G29/00A62D3/17A62D101/28A62D101/26
Inventor 黄应平李新玉方艳芬陆朝阳
Owner CHINA THREE GORGES UNIV
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