Titanium dioxide photocatalysis composite film and preparation method thereof

A titanium dioxide and composite thin film technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as cumbersome steps, and achieve simple process conditions, tight integration, The effect of improving the degradation efficiency

Inactive Publication Date: 2010-08-25
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the rare earth ion Ce in this invention 3+ 、Gd 3+ The dosage is very small, and the compound Y 3 Al 5 o 12 :0.2Ce 3+ , 0.2Gd 3+ It needs to be prepared by chemical method, and the steps are cumbersome

Method used

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  • Titanium dioxide photocatalysis composite film and preparation method thereof
  • Titanium dioxide photocatalysis composite film and preparation method thereof
  • Titanium dioxide photocatalysis composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: Weigh 18g anhydrous sodium carbonate, 2g sodium silicate nonahydrate, add 1000ml deionized water to dissolve and place in the reaction tank as electrolyte; weigh 2g Eu 2 o 3 , add a small amount of deionized water to ultrasonically disperse and add it to the electrolyte, and stir it with an electric mixer to disperse evenly in the electrolyte; through the action of circulating condensed water, the temperature of the entire system in the reaction tank is controlled within 40°C; choose polishing treatment The final titanium alloy was used as the anode material, and the stainless steel plate was used as the cathode material. The pulse voltage was slowly increased to 350V between the two electrodes, and the reaction was stable for 15 minutes. After the reaction, the titanium alloy anode was cleaned with ultrasonic waves.

Embodiment 2

[0034] Embodiment 2: Weigh 25g anhydrous sodium carbonate, 2g sodium silicate nonahydrate, add 1000ml deionized water to dissolve and place in reaction tank as electrolyte; Weigh 5g Eu 2 o 3 , add a small amount of deionized water to ultrasonically disperse and add it to the electrolyte, and stir it with an electric mixer to disperse evenly in the electrolyte; through the action of circulating condensed water, the temperature of the entire system in the reaction tank is controlled within 40°C; choose polishing treatment The final titanium alloy was used as the anode material, and the stainless steel plate was used as the cathode material. The pulse voltage was slowly increased to 400V between the two electrodes, and the reaction was stable for 5 minutes. After the reaction, the titanium alloy anode was cleaned with ultrasonic waves.

Embodiment 3

[0035] Embodiment 3: Weigh 15g anhydrous sodium carbonate, 10g sodium silicate nonahydrate, add 1000ml deionized water to dissolve and place in the reaction tank as electrolyte; weigh 1g Eu 2 o 3 , add a small amount of deionized water to ultrasonically disperse and add it to the electrolyte, and stir it with an electric mixer to disperse evenly in the electrolyte; through the action of circulating condensed water, the temperature of the entire system in the reaction tank is controlled within 40°C; choose polishing treatment The final titanium alloy was used as the anode material, and the stainless steel plate was used as the cathode material. The pulse voltage was slowly increased to 250V between the two electrodes, and the reaction was stable for 30 minutes. After the reaction, the titanium alloy anode was cleaned with ultrasonic waves.

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Abstract

The invention provides a titanium dioxide (TiO2) photocatalysis composite film and a preparation method thereof. The titanium dioxide (TiO2) photocatalysis composite film is generated in situ on a titanium alloy (Ti-6Al-4V) substrate by adopting a micro-arc oxidation (MAO) method, the film contains grains of rare earth oxides of europiumsesquioxide (Eu2O3) in a one-dimensional structure, and the film has the crystalling phase of anatase. Eu2O3 grains have the effect of catalysts or catalyst accelerators in the TiO2 photocatalysis composite films, and the compounding time of TiO2 photo-induced electrons and hole pairs can be prolonged in the photocatalysis process, so the optical photon yield can be improved. The invention is applied to the photocatalysis purification field. Compared with uncompounded TiO2 films, the TiO2 photocatalysis composite film of the invention has the advantages that the absorption efficiency on ultraviolet light and visible light is obviously improved, the degradation efficiency of the organic pollution can be improved by about one time.

Description

technical field [0001] The invention belongs to the field of preparation of two-dimensional inorganic materials, in particular to a titanium dioxide (TiO 2 ) film and its preparation method. Background technique [0002] Since the 1970s, about TiO 2 The technology of photocatalytic treatment of refractory organic pollutants has made remarkable progress and shows good application prospects. Due to the shortcomings of the particle suspension system, such as difficult separation and recovery of photocatalysts, and limited light radiation depth, more research has been devoted to the preparation of supported catalysts at home and abroad. The main preparation methods are: sol-gel method, powder sintering method, deposition method, ion exchange method, coupling method, etc., but these methods use molecular synthesis to prepare TiO 2 And through sintering technology to realize the combination with the carrier, there are generally disadvantages such as low photocatalytic efficienc...

Claims

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Application Information

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IPC IPC(8): C25D11/26B01J23/22B01J23/10B01J21/06B01J37/34
Inventor 潘春旭王永钱江旭东
Owner WUHAN UNIV
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