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a photosensitized wo 3 /tio 2 Catalytic membrane and its preparation method

A technology of photosensitization and catalytic membrane, which is applied in the field of materials, can solve the problem of low visible light activity, and achieve the effects of simple preparation, difficult recovery and separation, and low cost

Active Publication Date: 2020-06-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a simple and reliable photosensitized WO 3 / TiO 2 Catalytic membrane and its preparation method

Method used

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  • a photosensitized wo <sub>3</sub> /tio <sub>2</sub> Catalytic membrane and its preparation method
  • a photosensitized wo <sub>3</sub> /tio <sub>2</sub> Catalytic membrane and its preparation method
  • a photosensitized wo <sub>3</sub> /tio <sub>2</sub> Catalytic membrane and its preparation method

Examples

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Effect test

Embodiment 1

[0041] A photosensitized WO 3 / TiO 2 The preparation method of catalytic membrane specifically comprises the following process steps:

[0042] (1) Titanium substrate pretreatment: Use 220 #, 400 #, 1000 #, 2000 # sandpaper to polish the surface of the titanium substrate (commercially pure titanium, >99%) step by step to remove the oxide layer, oil and impurities on the surface to ensure The precision of the surface treatment;

[0043] (2) Surface cleaning of the substrate: ultrasonically clean the surface of the titanium substrate treated in step (1) with absolute ethanol and deionized water in sequence for 10 minutes to remove oil and impurities;

[0044] (3) Electrolyte preparation: Dissolve sodium phosphate and phosphotungstic acid in deionized water, shake well to obtain electrolyte, in which the concentrations of sodium phosphate and phosphotungstic acid in the electrolyte are 12 g / L and 2 g / L respectively ;

[0045](4) Using the electrolyte system in step (3), the ti...

Embodiment 2

[0049] A photosensitized WO 3 / TiO 2 The preparation method of catalytic membrane specifically comprises the following process steps:

[0050] (1) Titanium substrate pretreatment: Use 220 #, 400 #, 1000 #, 2000 # sandpaper to polish the surface of the titanium substrate (commercially pure titanium, >99%) step by step to remove the oxide layer, oil and impurities on the surface to ensure The precision of the surface treatment;

[0051] (2) Surface cleaning of the substrate: ultrasonically clean the surface of the titanium substrate treated in step (1) with absolute ethanol and deionized water in sequence for 10 minutes to remove oil and impurities;

[0052] (3) Electrolyte preparation: Dissolve sodium phosphate and phosphotungstic acid in deionized water, shake well to obtain electrolyte, in which the concentrations of sodium phosphate and phosphotungstic acid in the electrolyte are 16 g / L and 4 g / L respectively ;

[0053] (4) Using the electrolyte system in step (3), the t...

Embodiment 3

[0057] A photosensitized WO 3 / TiO 2 The preparation method of catalytic membrane specifically comprises the following process steps:

[0058] (1) Titanium substrate pretreatment: Use 220 #, 400 #, 1000 #, 2000 # sandpaper to polish the surface of the titanium substrate (commercially pure titanium, >99%) step by step to remove the oxide layer, oil and impurities on the surface to ensure The precision of the surface treatment;

[0059] (2) Surface cleaning of the substrate: ultrasonically clean the surface of the titanium substrate treated in step (1) with absolute ethanol and deionized water in sequence for 10 minutes to remove oil and impurities;

[0060] (3) Electrolyte preparation: Dissolve sodium phosphate and phosphotungstic acid in deionized water, shake well to obtain electrolyte, in which the concentrations of sodium phosphate and phosphotungstic acid in the electrolyte are 18 g / L and 1 g / L respectively ;

[0061] (4) Using the electrolyte system in step (3), the t...

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Abstract

The invention discloses a photosensitized WO 3 / TiO 2 catalytic film and a preparation method thereof. The method includes the following steps: (1) Pretreatment of the surface of the titanium substrate; (2) Preparation of an alkaline sodium phosphate / phosphotungstic acid composite electrolyte; (3) Using the titanium substrate in step (1) as an anode, placed in In the double-layer glass reactor containing the electrolyte of step (2), plasma electrolytic oxidation treatment is carried out to prepare WO 3 / TiO 2 Membrane; (4) Formulate photosensitizing solution; (5) Put WO 3 / TiO 2 The film in the photosensitizing solution; (6) Evaporate the solvent in the photosensitizing solution to get the photosensitizing WO 3 / TiO 2 Catalytic membrane. The catalytic membrane obtained by the invention has the advantages of simple preparation process, low cost, porous membrane layer, visible light response and the like.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a photosensitized WO 3 / TiO 2 Catalytic membrane and method for its preparation. Background technique [0002] Plasma electrolytic oxidation (PEO) technology is a surface treatment technology for light metals (Al, Mg, Ti, Zr, etc.). The technology is simple to operate, green and environmentally friendly, and the prepared film has good mechanical and mechanical properties, which has attracted extensive research. Applying it to the surface treatment of titanium alloy can improve the performance of the surface of titanium alloy, and prepare films with different compositions, structures and functions. PEO technology has achieved a lot of research in the field of catalyst preparation, especially in the field of photocatalysis. However, the film layer prepared by this method generally only has a catalytic effect under ultraviolet light, and there are few reports on the photosensitization m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J37/34B01J35/02C25D11/26B01J35/00
Inventor 陈砺秦红雷严宗诚
Owner SOUTH CHINA UNIV OF TECH