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Preparation method for BiOCl photocatalyst with controllable morphology and crystal face

A photocatalyst, crystal face technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high pH, ​​harsh reaction conditions, long reaction time, etc. Simple, mild reaction conditions

Inactive Publication Date: 2015-06-10
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparation methods usually have harsh reaction conditions, such as high temperature, high pressure, long reaction time, high pH, ​​etc.

Method used

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  • Preparation method for BiOCl photocatalyst with controllable morphology and crystal face
  • Preparation method for BiOCl photocatalyst with controllable morphology and crystal face
  • Preparation method for BiOCl photocatalyst with controllable morphology and crystal face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first step is to accurately weigh three parts of Bi(NO 3 ) 3 ·5H 2 O was added to 30mL of deionized water, ethanol or dimethylformamide solvent respectively, stirred for 10min until uniform, and obtained

[0024] Three mixtures containing bismuth, numbered A, B, C respectively;

[0025] In the second step, add 11.5 mmol of 1-butyl-3-methylimidazole chloride to A, B, and C respectively, stir for 10 minutes and mix well to obtain a white mixed solution;

[0026] In the third step, put the three parts of the white mixture obtained in the second step into a KQ-100 ultrasonic cleaner for 10 min, and adjust the reaction temperature to 30°C;

[0027] In the fourth step, the three mixed solutions were centrifuged after ultrasonication, and the obtained precipitates were alternately washed three times with deionized water and ethanol, and then vacuum-dried at 60° C. for 24 hours to obtain BiOCl photocatalyst powders with different shapes.

Embodiment 2

[0029] The first step is to accurately weigh three parts of Bi(NO 3 ) 3 ·5H 2 O was added to 20mL of deionized water, ethanol or dimethylformamide solvent, and stirred for 10min until uniform, and three parts of bismuth-containing mixed solutions were obtained, respectively numbered as A, B, and C;

[0030] In the second step, add 10 mmol of 1-butyl-3-methylimidazole chloride to A, B, and C respectively, stir for 10 minutes and mix well to obtain a white mixed solution;

[0031] In the third step, put the three white mixtures obtained in the second step into a KQ-100 ultrasonic cleaner for 20 min, and adjust the reaction temperature to 25°C;

[0032] In the fourth step, the three mixed solutions were centrifuged after ultrasonication, and the obtained precipitates were alternately washed three times with deionized water and ethanol, and then vacuum-dried at 60° C. for 24 hours to obtain BiOCl photocatalyst powders with different shapes.

Embodiment 3

[0034] The first step is to accurately weigh three parts of Bi(NO 3 ) 3 ·5H 2 O was added to 25mL of deionized water, ethanol or dimethylformamide solvent respectively, and stirred for 10 minutes until uniform, and three parts of bismuth-containing mixed solutions were obtained, respectively numbered A, B, and C;

[0035] In the second step, add 15 mmol of 1-butyl-3-methylimidazole chloride to A, B, and C respectively, stir for 10 minutes and mix well to obtain a white mixed solution;

[0036] In the third step, put the three white mixtures obtained in the second step into a KQ-100 ultrasonic cleaner for 30 min, and adjust the reaction temperature to 25°C;

[0037] In the fourth step, the three mixed solutions were centrifuged after ultrasonication, and the obtained precipitates were alternately washed three times with deionized water and ethanol, and then vacuum-dried at 60° C. for 24 hours to obtain BiOCl photocatalyst powders with different shapes.

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Abstract

The invention provides a preparation method for a BiOCl photocatalyst with a controllable morphology and a crystal face, and belongs to the technical field of environmental chemical engineering photocatalysis water treatment. The preparation method is characterized by comprising the following steps: adding Bi(NO3)3.5H2O into a certain amount of water, ethyl alcohol or a dimethyl formamide solvent, uniformly stirring, then adding a certain amount of chlorination-1-butyl-3-methylimidazole, stirring for 20min for uniform mixing, performing ultrasonic treatment under room temperature for 10-60min, and reacting to generate white precipitate; washing the precipitate by water and ethyl alcohol, and drying the precipitate under the temperature of 60 DEG C to obtain BiOCl photocatalyst powder with different morphologies. According to the preparation method provided by the invention, the BiOCl preparation period is short, and the use of a surfactant is avoided; by control on the solvent, the preparation method for implementing BiOCl crystal surface control (101 and 102) and morphology control (a nano sheet shape, a flower-like structure and an irregular disk shape) can be conveniently realized. The preparation method is completed in the next step under the room temperature, has the advantages of simple process, extremely short preparation period, environment friendliness and the like and is favorable for engineering large-scale preparation. The catalyst has outstanding degrading effects on rhodamine B, methyl orange, quinoline blue and the like by visible light and sunshine and has an actual application prospect.

Description

technical field [0001] The invention relates to a preparation method of a BiOCl photocatalyst with controllable morphology and crystal plane, belonging to the technical field of environmental chemical photocatalytic water treatment. Background technique [0002] In recent years, environmental pollution has become increasingly serious, and most organic pollutants have not been effectively treated. Photocatalytic oxidation technology is to directly convert solar energy into chemical energy and electrical energy through semiconductor photocatalytic materials, and completely mineralize and degrade toxic organic pollutants in the environment. It is considered to be the most potential technology to solve energy and environmental problems in human society. One of the options. [0003] Bismuth oxychloride (BiOCl), a ternary semiconductor, is considered to be a semiconductor material with potential application value due to its unique and high-quality electrical properties, magn...

Claims

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Application Information

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IPC IPC(8): B01J27/06
Inventor 李涛海杨成玉李凤
Owner XIANGTAN UNIV
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