Preparation of high efficiency nano Ti1-XO2-SnX/TiO2-X-NX compound film

A technology of ti1-xo2-snx and composite thin film, which is applied in the field of photocatalysis, can solve the problems of low absorption efficiency of visible light and utilization rate of photogenerated carriers, low utilization rate of solar energy and photocatalysis efficiency, and inconspicuous photocatalysis activity, and achieves Visible light catalytic activity is improved, the probability is increased, and the effect of visible light catalytic activity is high

Inactive Publication Date: 2008-09-10
NANKAI UNIV
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AI Technical Summary

Problems solved by technology

[0005] So far, single-ion doped nano-TiO 2 Although the visible light-based catalyst has certain visible light catalytic activity, the visible light absorption efficiency and photogenerated carrier utilization rate are low, and the photocatalytic activity is not obvious.
[0006] The purpose of the present invention is to adopt new scientific ideas, preparation methods and control technology to develop "high-efficiency Ti 1-x o 2 -Sn x / TiO 2-x -N x Nanocomposite thin-film visible light catalyst" aims to solve the key problems of low solar energy utilization rate and photocatalytic efficiency and catalyst immobilization (not easy to recycle), and establish new technologies for regulating the structure, performance and function of catalysts, in order to achieve high efficiency of visible light catalysts , high performance and practical application in the field of environmental purification lay the foundation
The invention has been proved by domestic and foreign patent science and technology novelty search, and no relevant literature reports have been found

Method used

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  • Preparation of high efficiency nano Ti1-XO2-SnX/TiO2-X-NX compound film
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  • Preparation of high efficiency nano Ti1-XO2-SnX/TiO2-X-NX compound film

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preparation example Construction

[0016] 1. TiO 2-X -N X Sol preparation

[0017] At room temperature, add a certain amount of nitrogen-containing compound in a certain amount of water, stir to dissolve it, then add a certain amount (a ml) of diluent, stir for 0-30min, add a certain amount of acid catalyst, and continue stirring for 0 After -30min, add a certain amount (b ml) of titanate, stir for 0-30min, then add a certain amount of acid catalyst, seal and stir for 0.5-4 hours, and then pull the membrane.

[0018] 2. Ti 1-X o 2 -Sn X Sol preparation

[0019] At room temperature, add a certain amount of diluent to a certain amount of water, stir for 0-30 minutes, add a certain amount (a ml) of acid catalyst, continue stirring for 0-30 minutes, add a certain amount of titanate, and stir for 0-30 minutes. After 30 minutes, add a certain amount (b ml) of acid catalyst, and finally add a certain amount of tin salt, seal and stir for 0.5-4 hours, and then prepare to pull the membrane.

[0020] 3. Pure TiO ...

Embodiment

[0047] 1. TiO 2-X -N X Sol preparation

[0048] At room temperature, add 4g of urea to 3.64ml of water, stir to dissolve it, then add 40ml of absolute ethanol, stir for 10min, add 8.32ml of concentrated hydrochloric acid, continue stirring for 15min, then add 30ml of tetrabutyl titanate, Stir for 30 minutes, then add 6ml of concentrated hydrochloric acid, seal and stir for 2 hours, then prepare to pull the membrane.

[0049] 2. Ti 1-X o 2 -Sn X Sol preparation

[0050] At room temperature, add 40ml of absolute ethanol to 3.64ml of water, stir for 10min, add 8.32ml of concentrated hydrochloric acid, continue stirring for 15min, add 30ml of tetrabutyl titanate, stir for 30min, then add 6ml of concentrated hydrochloric acid, Finally, 0.4 ml of anhydrous tin tetrachloride was added, sealed and stirred for 2 hours, and the membrane was pulled for later use.

[0051] 3. Pure TiO 2 Sol preparation

[0052] Similar to the above doped TiO 2 The preparation of the sol, but no ...

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Abstract

The invention discloses a method for preparing an effective Ti1-XO2-SnX/TiO2-X-NX nanometer compound film visible light catalyst and belongs to the technical field of photocatalysis. The invention takes titanic acid ester as a precursor, takes nitrogenous compounds and pink salt as dopant and adopts a sol-gel method for preparing the nanometer TiO2-based compound film with an adulterated heterogeneous interface p-n knot structure. The ultraviolet and visible light catalytic activities of the catalyst are all over the TiO2 film adulterated with N ion. The method has the following innovation points of: 1, the TiO2-based catalyst can generate high absorption of ultraviolet light and visible light by being adulterated with Sn and N ions; 2, the heterogeneous interface of the compound film of the catalyst forms a p-n knot energy band structure through the combination of Ti1-X O2-SnX and TiO2-X-NX, thus promoting the separation of a photo-generated carrier, improving the probability of the photo-generated carrier to participate in the photocatalysis reaction and effectively degrading pollutants.

Description

【Technical field】 [0001] The invention belongs to the field of photocatalytic technology research, is mainly used in the environmental purification of water and air, and is a new type of high-efficiency TiO used to remove organic and inorganic pollutants in the environment. 2 Composite Thin Film Visible Light Catalyst Method. 【Background technique】 [0002] TiO 2 It has the advantages of low price and good stability, and has the special function of sterilizing and degrading environmental pollution under ultraviolet light irradiation, and is a kind of environmental purification material with good performance. Nano TiO 2 The photocatalyst based on solar energy realizes environmental purification, which not only saves energy, but also sterilizes and degrades pollutants (organic and inorganic pollutants) in the atmosphere and water. It is an ideal science and technology for environmental governance. attention of the scientific community. [0003] However, currently TiO 2 Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J21/06B01J23/14B01D53/86C02F1/30
Inventor 曹亚安曹永强王恩君
Owner NANKAI UNIV
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