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FeOOH/Fe3O4/WO3/TiO2 photo-Fenton catalytic membrane as well as preparation method and application thereof

A technology of catalytic membrane and carrier membrane, which is applied in the field of membrane catalysis, can solve the problems of low catalytic efficiency of plasma electrolytic oxidation catalytic membrane and difficult recovery of Fenton-like catalysts, and achieve excellent catalytic efficiency, uniform distribution of active components, and optimal application foreground effect

Active Publication Date: 2021-08-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a simple and reliable FeOOH / Fe 3 o 4 / WO 3 / TiO 2 Photo-Fenton catalytic film and its preparation method and application

Method used

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  • FeOOH/Fe3O4/WO3/TiO2 photo-Fenton catalytic membrane as well as preparation method and application thereof
  • FeOOH/Fe3O4/WO3/TiO2 photo-Fenton catalytic membrane as well as preparation method and application thereof
  • FeOOH/Fe3O4/WO3/TiO2 photo-Fenton catalytic membrane as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A FeOOH / Fe 3 o 4 / WO 3 / TiO 2 The preparation method of photo-Fenton catalytic membrane specifically comprises the following process steps:

[0059] (1) Titanium substrate pretreatment: Use a file, 500-mesh sandpaper, and 1000-mesh sandpaper to polish the pure titanium substrate of brand TA1 in sequence to remove stains and oxide layers on the surface of the substrate to make it smooth, and then use deionized water, anhydrous Ultrasonic cleaning with ethanol for 5 minutes, rinse with absolute ethanol, and dry in warm air;

[0060] (2) Alkaline electrolyte solution: Dissolve 2g of phosphotungstic acid, 6g of potassium ferrocyanide, and 14g of sodium phosphate in deionized water, mix well, and set the volume to 1L to obtain phosphotungstic acid, potassium ferrocyanide, The concentration of sodium phosphate is 2g / L, 6g / L, 14g / L alkaline electrolyte;

[0061] (3) Preparation of carrier film by plasma electrolytic oxidation: connect the dried substrate in step (1) to th...

Embodiment 2

[0071] A FeOOH / Fe 3 o 4 / WO 3 / TiO 2 The preparation method of photo-Fenton catalytic membrane specifically comprises the following process steps:

[0072] (1) Titanium substrate pretreatment: Use a file, 500-mesh sandpaper, and 1000-mesh sandpaper to polish the pure titanium substrate of brand TA1 in sequence to remove stains and oxide layers on the surface of the substrate to make it smooth, and then use deionized water, anhydrous Ultrasonic cleaning with ethanol for 5 minutes, rinse with absolute ethanol, and dry in warm air;

[0073] (2) Alkaline electrolyte solution: Dissolve 0.5g phosphotungstic acid, 6g potassium ferrocyanide, and 14g sodium phosphate in deionized water, mix well, and set the volume to 1L to obtain phosphotungstic acid and potassium ferrocyanide , The concentration of sodium phosphate is respectively 0.5g / L, 6g / L, 14g / L alkaline electrolyte;

[0074] (3) Preparation of carrier film by plasma electrolytic oxidation: connect the dried substrate in st...

Embodiment 3

[0084] A FeOOH / Fe 3 o 4 / WO 3 / TiO 2 The preparation method of photo-Fenton catalytic membrane specifically comprises the following process steps:

[0085] (1) Titanium substrate pretreatment: Use a file, 500-mesh sandpaper, and 1000-mesh sandpaper to polish the pure titanium substrate of brand TA1 in sequence to remove stains and oxide layers on the surface of the substrate to make it smooth, and then use deionized water, anhydrous Ultrasonic cleaning with ethanol for 5 minutes, rinse with absolute ethanol, and dry in warm air;

[0086] (2) Alkaline electrolyte solution: Dissolve 2g of phosphotungstic acid, 6g of potassium ferrocyanide, and 14g of sodium phosphate in deionized water, mix well, and set the volume to 1L to obtain phosphotungstic acid, potassium ferrocyanide, The concentration of sodium phosphate is 2g / L, 6g / L, 14g / L alkaline electrolyte;

[0087] (3) Preparation of carrier film by plasma electrolytic oxidation: connect the dried substrate in step (1) to th...

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Abstract

The invention discloses a FeOOH / Fe3O4 / WO3 / TiO2 photo-Fenton catalytic membrane as well as a preparation method and application of the FeOOH / Fe3O4 / WO3 / TiO2 photo-Fenton catalytic membrane. The method comprises the following steps: (1) polishing, cleaning and drying a titanium substrate; (2) preparing an alkaline electrolyte containing phosphotungstic acid, potassium ferrocyanide and sodium phosphate; (3) preparing a carrier film on the surface of the titanium substrate by using a plasma electrolytic oxidation technology; (4) preparing a ferric nitrate solution as an impregnation liquid; and (5) putting the carrier membrane prepared in the step (3) into impregnation liquid for impregnation, taking out, drying and calcining to obtain the photo-Fenton catalytic membrane. The prepared photo-Fenton catalytic membrane is used for photo-assisted heterogeneous Fenton reaction, catalytic degradation of phenol is achieved, and the photo-Fenton catalytic membrane has high visible light utilization efficiency and catalytic efficiency. The photo-Fenton catalytic membrane provided by the invention has the advantages of high active component content, green and environment-friendly raw materials and process, simple preparation operation, good catalytic performance and the like, and has a better application prospect.

Description

technical field [0001] The invention belongs to the field of membrane catalysis, in particular to a FeOOH / Fe 3 o 4 / WO 3 / TiO 2 Photo-Fenton catalytic film and its preparation method and application. Background technique [0002] Plasma Electrolytic Oxidation (PEO) is a surface treatment technology developed on the basis of anodic oxidation for valve metals (Valve Metals, such as Al, Ti, Mg, etc.) in a discharged state. Theoretically, as long as the solution is accessible, the technology can be used to form an oxide ceramic film with strong binding force, controllable thickness range, corrosion resistance and wear resistance on the valve metal surface in situ. The film layer has the characteristics of well-developed surface, biocompatibility, high temperature resistance, and easy control of morphology and components. As a method for preparing functional coatings, plasma electrolytic oxidation technology has good application potential in the field of photocatalysis. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J35/10C02F1/72C02F101/34
CPCB01J23/888C02F1/722C02F2305/10C02F2101/345B01J35/39B01J35/61Y02W10/37
Inventor 陈砺肖阳严宗诚
Owner SOUTH CHINA UNIV OF TECH
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