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Electrochemical preparation and application method of composite film photocatalyst BiPO4/ BiOCl

A composite thin film and photocatalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of short preparation time, mild conditions and mild reaction conditions

Inactive Publication Date: 2016-07-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A kind of composite film photocatalyst BiPO of the present invention 4 The purpose of the electrochemical preparation and application method of / BiOCl is to: for powder BiPO 4 / BiOCl catalyst is not easy to separate from the reaction system, and a method to combine BiPO 4 / BiOCl immobilization method, using bismuth plate, potassium chloride, and potassium dihydrogen phosphate as raw materials, and using bismuth plate as the substrate, the immobilized BiPO was prepared by electrochemical method at room temperature in one step 4 / BiOCl film, the preparation method is simple and easy, the raw materials used are common and easy to obtain, the whole process is simple to operate, the reaction cycle is short, and it is easy to realize large-scale industrial production

Method used

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  • Electrochemical preparation and application method of composite film photocatalyst BiPO4/ BiOCl
  • Electrochemical preparation and application method of composite film photocatalyst BiPO4/ BiOCl

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] Weigh 0.05 mol of potassium chloride and 0.05 mol of potassium dihydrogen phosphate respectively, dissolve them in 100 mL of distilled water, and prepare an electrolyte solution. After the metal bismuth plate and titanium plate were polished, they were cleaned and dried with ethanol and deionized water successively; the bismuth plate was used as the anode and the titanium plate was used as the cathode, which were placed in the electrolyte solution and reacted for 7 hours under the condition of 2V voltage and magnetic stirring. After the reaction, BiPO is obtained at the anode 4 / BiOCl composite catalyst film, washed three times with absolute ethanol and deionized water, and then dried in an oven at 40 ° C, that is, BiPO was obtained at the anode 4 / BiOCl composite catalyst film.

[0019] The obtained photocatalyst is used for oxidation treatment of phenol solution. The reaction conditions are: under normal temperature and pressure, 50mL of 10mg / L phenol solution, usin...

Embodiment approach 2

[0021] Weigh 0.05 mol of potassium chloride and 0.05 mol of potassium dihydrogen phosphate respectively, dissolve them in 100 mL of distilled water, and prepare an electrolyte solution. After polishing the metal bismuth plate and titanium plate, they were cleaned and dried with ethanol and deionized water successively; the bismuth plate was used as the anode and the titanium plate was used as the cathode, which were placed in the electrolyte solution and reacted for 5 hours under the condition of 5V voltage and magnetic stirring. After the reaction, BiPO is obtained at the anode 4 / BiOCl composite catalyst film, washed three times with absolute ethanol and distilled water, and then dried in an oven at 40 ° C, that is, BiPO was obtained at the anode 4 / BiOCl composite catalyst film.

[0022] The obtained photocatalyst is used for oxidation treatment of phenol solution. The reaction conditions are: under normal temperature and pressure, 50mL of 10mg / L phenol solution, using th...

Embodiment approach 3

[0024] Weigh 0.05 mol of potassium chloride and 0.05 mol of potassium dihydrogen phosphate respectively, dissolve them in 100 mL of distilled water, and prepare an electrolyte solution. After grinding the metal bismuth plate and titanium plate, they were cleaned and dried with ethanol and deionized water successively; the bismuth plate was used as the anode and the titanium plate was used as the cathode, which were placed in the electrolyte solution and reacted for 4 hours under the condition of 7V voltage and magnetic stirring. After the reaction, BiPO is obtained at the anode 4 / BiOCl composite catalyst film, washed three times with absolute ethanol and distilled water, and then dried in an oven at 40 ° C, that is, BiPO was obtained at the anode 4 / BiOCl composite catalyst film.

[0025] The obtained photocatalyst is used for oxidation treatment of phenol solution. The reaction conditions are: under normal temperature and pressure, 50mL of 10mg / L phenol solution, using the...

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Abstract

The invention relates to electrochemical preparation and an application method of a composite film photocatalyst BiPO4 / BiOCl, belonging to the technical field of environmental chemical photocatalytic water treatment. The electrochemical preparation is characterized in that the composite film photocatalyst BiPO4 / BiOCl is synthesized by an electrochemical one-step method under a room temperature condition, wherein synthesis conditions are as follows: a metal Bi plate is taken as an anode, a Ti sheet is taken as a cathode, a water solution prepared by KC1 and KH2PO4 is taken as an electrolyte solution, and the distance between two electrodes is 5-10cm; a reaction is carried out for 2-7 hours by magnetic stirring under a voltage of 2-10V, a BiPO4 / BiOCl composite film having a heterojunction rod-shaped structure and a sheet structure which are connected with each other can be obtained on the surface of the anode Bi plate, and the obtained BiPO4 / BiOCl composite film can be used after being washed by distilled water and being naturally aired. The composite film photocatalyst directly grows on the Bi plate in situ, and the film has strong adhesion with a substrate, so that the problem of dropping off is avoided; furthermore, the preparation technology is simple; the obtained film is good in activity and is suitable for degrading organic pollutants in water or air by photocatalysis.

Description

technical field [0001] A kind of composite film photocatalyst BiPO of the present invention 4 The electrochemical preparation and application method of / BiOCl belongs to the technical field of photocatalysis and environmental chemical water treatment, and specifically relates to a method of preparing BiPO with a metal bismuth plate as an anode by a one-step electrochemical method 4 / BiOCl composite thin film photocatalyst technical scheme. Background technique [0002] In Bi-based photocatalysts, bismuth oxyhalide is composed of [Bi 2 o 2 ] layer and free halogen atoms have a highly anisotropic layered photocatalyst structure, which can promote the separation of photogenerated electrons and holes to enhance the photocatalytic activity. However, the recombination of photogenerated electrons and holes will reduce the catalytic activity of BiOX during the degradation process, so it is necessary to modify BiOX to further improve its photocatalytic activity. By compounding wi...

Claims

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Application Information

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IPC IPC(8): B01J27/186B01J37/34C02F1/32C02F101/34
CPCC02F1/32B01J27/186B01J37/348C02F2101/345B01J35/39
Inventor 樊彩梅胡颖媛李双志张小超王雅文王韵芳丁光月
Owner TAIYUAN UNIV OF TECH
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