Preparation method of composite photocatalyst film for degrading phenol in water

A photocatalyst and composite light technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as difficult separation, achieve improved separation rate, cheap and easy-to-obtain raw materials, and improved absorption range effect

Active Publication Date: 2020-10-27
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to aim at the defect that the Bi-based powder photocatalyst is not easily separated from the reaction system, and at the same time improve the response range of the thin-film photocatalyst to the spectrum and the separation rate of photo-induced carriers, and provide a composite photocatalyst that can be used to degrade phenol in water Film Preparation Method

Method used

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  • Preparation method of composite photocatalyst film for degrading phenol in water
  • Preparation method of composite photocatalyst film for degrading phenol in water
  • Preparation method of composite photocatalyst film for degrading phenol in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] Weigh 0.01moL of potassium chloride, 0.01moL of potassium bromide and 0.01moL of potassium dihydrogen phosphate, and dissolve them in 100mL of distilled water to prepare an electrolyte solution. The metal bismuth plate and titanium plate were polished, washed with ethanol and deionized water, and dried; 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 electrolyzed for 4 hours under the condition of 4V voltage and magnetic stirring. After the reaction, the anode Bi plate was washed three times with absolute ethanol and deionized water, and then dried naturally at room temperature to obtain BiOCl 0.5 Br 0.5 / BiPO 4 Composite photocatalyst film.

[0023] The obtained photocatalyst film was used to degrade phenol solution. The reaction conditions are: under normal temperature and pressure, 50mL of 10mg / L phenol solution, using the prepared film as a photocatalyst, blowing air into t...

Embodiment approach 2

[0025]Weigh 0.01moL of potassium chloride, 0.01moL of potassium bromide and 0.01moL of potassium dihydrogen phosphate, and dissolve them in 100mL of distilled water to prepare an electrolyte solution. After the metal bismuth plate and titanium plate are polished, they are cleaned and dried with ethanol and deionized water successively; the bismuth plate is used as the anode and the titanium plate is used as the cathode, which are placed in the electrolyte solution and electrolyzed for 3.5 hours under the condition of 8V voltage and magnetic stirring . After the reaction, the anode Bi plate was washed three times with absolute ethanol and deionized water, and then dried naturally at room temperature to obtain BiOCl 0.5 Br 0.5 / BiPO 4 Composite photocatalyst film.

[0026] The obtained photocatalyst film was used to degrade phenol solution. The reaction conditions are: under normal temperature and pressure, 50mL of 10mg / L phenol solution, using the prepared film as a photoca...

Embodiment approach 3

[0028] Weigh 0.01moL of potassium chloride, 0.01moL of potassium bromide and 0.01moL of potassium dihydrogen phosphate, and dissolve them in 100mL of distilled water to 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 electrolyzed for 3 hours under 12V voltage and magnetic stirring conditions. After the reaction, the anode Bi plate was washed three times with absolute ethanol and deionized water, and then dried naturally at room temperature to obtain BiOCl 0.5 Br 0.5 / BiPO 4 Composite photocatalyst film.

[0029] The obtained photocatalyst film was used to degrade phenol solution. The reaction conditions are: under normal temperature and pressure, 50mL of 10mg / L phenol solution, using the prepared film as a photocatalyst, ...

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Abstract

The invention relates to a preparation method for a composite photocatalyst film for degrading phenol in water. According to the preparation method, with a metal Bi plate as an anode and a Ti plate asa cathode and aqueous solution prepared from KCl, KBr and KH2PO4 according to the concentration ratio of 1:1:1 as electrolyte solution, electrolysis is carried out by 4V to 20V for 0.5 to 4 hours, sothat a BiOCl0.5Br0.5 / BiPO4 photocatalyst film is obtained on the surface of the anodal Bi plate, and after being washed with distilled water and naturally air-dried, the composite photocatalyst filmcan be used. The photocatalyst film is directly grown in situ on the Bi plate, the adhesion between the film and a substrate is high, the problem of shedding does not exist, moreover, the electrochemical preparation process is simple, and the obtained photocatalyst film has excellent photocatalytic activity, and is applicable to the photocatalytic degradation of organic pollutants in water.

Description

technical field [0001] The invention relates to a preparation method of a composite photocatalyst thin film, specifically a kind of metal elemental Bi plate as an anode, a Ti sheet as a cathode, by preparing KCl, KBr and KH with a concentration ratio of 1:1:1 2 PO 4 The electrolyte solution of BiOCl was prepared by a one-step electrochemical method 0.5 Br 0.5 / BiPO 4 Technical scheme of composite photocatalyst film. Background technique [0002] In today's increasingly serious global environmental pollution, how to efficiently use solar energy to completely decompose mineralized pollutants and achieve the purpose of environmental governance has attracted more and more attention from researchers. Among the alternative photocatalysts, Bi-based photocatalysts are favored by people because of their simple preparation method, cheap and readily available raw materials, and excellent photocatalytic performance. Bismuth oxyhalide is a kind of Bi-based photocatalyst, which is pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/186B01J37/34C02F1/30C02F1/74C25D11/00C02F101/34
CPCB01J27/186B01J35/004B01J35/065B01J37/348C02F1/30C02F1/725C02F1/74C02F2101/345C02F2305/10C25D11/00
Inventor 樊彩梅吕瑞胡颖媛贾泽慧刘建新张小超李瑞王雅文王韵芳
Owner TAIYUAN UNIV OF TECH
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