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Superhydrophilic nano titanium dioxide photocatalysis composite membrane as well as preparation method and application thereof

A nano-titanium dioxide and super-hydrophilic technology, which is applied in the field of air purification treatment, can solve the problems of low photocatalytic efficiency of photocatalytic films, and achieve the effects of enhancing air purification ability, saving energy and improving efficiency

Inactive Publication Date: 2010-06-30
SOUTHEAST UNIV
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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 kind of ultra-hydrophilic nano-titanium dioxide photocatalytic composite film, which solves the problem of conventional nano-TiO 2 Problems such as low photocatalytic efficiency of photocatalytic thin films

Method used

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  • Superhydrophilic nano titanium dioxide photocatalysis composite membrane as well as preparation method and application thereof
  • Superhydrophilic nano titanium dioxide photocatalysis composite membrane as well as preparation method and application thereof
  • Superhydrophilic nano titanium dioxide photocatalysis composite membrane as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 13

[0034] Embodiment 13 layer composite SiO 2 -TiO 2 Film preparation and photocatalytic activity study

[0035] 1. TiO 2 Sol preparation

[0036] 25ml of Ti(OBu) 4 Add it dropwise to 8mli-PrOH while stirring, make it fully mixed to obtain solution A; a certain amount of ethylamine (N / Ti molar ratio is 10%) and SiO 2 Add the particles into 200ml of water, and control the pH range of 1.75 to 2.25 to obtain solution B; slowly add solution A to B dropwise under high-speed mechanical stirring. Under the condition of constant temperature 75°C water bath, stir and reflux for 24h.

[0037] 2. SiO2 2 Particle addition

[0038] In the above TiO 2 In the preparation of the sol, SiO with a particle size of about 500nm was added to the solution B 2 Particles with a Si / Ti molar ratio of 10%.

[0039] 3. Hydrophilicity test

[0040] Test conditions: room temperature 25°C, humidity 55%. The contact angle was detected by the CAM-200 dynamic contact angle detection system produced by ...

Embodiment 2

[0048] Example 2 Composite Bi 2 o 3 -TiO 2 Film preparation and photocatalytic activity study

[0049] 1. TiO 2 Sol preparation

[0050] 25ml of Ti(OBu) 4 Add it dropwise into 8mli-PrOH while stirring, make it fully mixed to obtain solution A; a certain amount of Bi 2 o 3 Add it into 200ml of water, and control its pH range from 1.8 to 3.0 to obtain solution B; under high-speed mechanical stirring, slowly add solution A to B dropwise. Under the condition of constant temperature 75°C water bath, stir and reflux for 24h.

[0051] 2. Bi 2 o 3 Particle addition

[0052] In the above TiO 2 In the preparation of the sol, Bi with a particle size of about 500nm was added to the solution B 2 o 3 Particles with a Bi / Ti molar ratio of 1.25%.

[0053] 3. Hydrophilicity test

[0054] Test conditions: room temperature 25°C, humidity 55%. The contact angle was detected by the CAM-200 dynamic contact angle detection system produced by Finland SKV company.

[0055] Test method...

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Abstract

The invention discloses a superhydrophilic nano titanium dioxide photocatalysis composite membrane as well as a preparation method and application thereof. The superhydrophilic nano titanium dioxide photocatalysis composite membrane comprises nanosize titanium dioxide sol and a submicron particle; and the particle is selected from one or more of the following compounds: silicon dioxide, bismuth oxide, active carbon, zinc oxide and iron oxide. The composite membrane can also maintain superhydrophilic performance for a long time without illumination and improves the efficiency of air purification processing by changing a common hydrophilic titanium dioxide membrane into the superhydrophilic membrane. The photocatalysis membrane can be widely applied to the technical field of air purification processing.

Description

technical field [0001] The invention belongs to the technical field of air purification treatment, and in particular relates to a superhydrophilic nano-titanium dioxide photocatalytic composite film for indoor air purification, a preparation method and application thereof. Background technique [0002] In recent years, the problem of air pollution has been paid more and more attention. Degradation of toxic pollutants through advanced oxidation processes (Advanced Oxidation Processes, AOPs) is a way of air purification. Among them, nano-TiO 2 Photocatalytic materials for air purification have become one of the most promising methods for environmental governance. Especially after proper modification, TiO 2 The photocatalytic degradation reaction can be excited by visible light source. Nano-TiO 2 One of the key problems to be solved in the practical application of photocatalysis is to improve the photocatalytic efficiency. There are many factors affecting the photocatalyt...

Claims

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Application Information

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IPC IPC(8): B01J21/08B01J21/06B01J23/18B01J23/745B01D53/86B01D53/72A62D3/10A62D101/28
Inventor 付德刚徐晶晶戎非
Owner SOUTHEAST UNIV
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