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Method for manufacturing vanadium doped visible light-responsible titanium dioxide nanocrystalline composite colloidal sols

A nanocrystalline composite, titanium dioxide technology, applied in titanium dioxide, chemical instruments and methods, catalyst activation/preparation and other directions, can solve the problems of heat-labile load application, limited coating substrates, low solar energy utilization, etc., and achieve obvious effects. , the preparation process is simple, the effect of a wide range of uses

Inactive Publication Date: 2008-12-10
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

However, the utilization efficiency of titanium dioxide to sunlight is still low due to its own energy band limitation
In addition, thin-film photocatalytic materials, which are an important form of application, are also difficult to support and apply on large-area substrates that are not heat-resistant or difficult to heat due to the limitation of titanium dioxide crystallization process.
The low utilization rate of solar energy and the limitation of coating substrates have become the key problems that need to be solved urgently in the application of titanium dioxide photocatalytic materials

Method used

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Embodiment Construction

[0013] The present invention is further described by examples below.

[0014] The operation steps in the embodiment of the present invention for preparing vanadium-doped visible light-responsive titanium dioxide nanocrystalline composite sol are as follows:

[0015] (1) Add at least one of titanium tetrachloride, titanium sulfate or butyl titanate into the alcohol dilution solvent of 1 to 10 times (m / m) under stirring conditions, and stir evenly;

[0016] (2) At a water bath temperature of 5-95°C, add 1-500 times (m / m) ammonium metavanadate aqueous solution dropwise to the mixed solution obtained in step (1), and stir for 0.5-5 hours;

[0017] (3) The sol is allowed to stand and age for 1 hour to 15 days to obtain a stable composite sol.

[0018] Described alcohol dilution solvent is dehydrated alcohol, ethylene glycol or isopropanol wherein one or more combination; The concentration of described ammonium metavanadate aqueous solution is: control the mol ratio that makes V an...

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Abstract

The invention relates to a preparation method for a sol. The invention aims at providing a preparation method for a vanadium doped visible light response titanium dioxide nano crystal composite sol. The method comprises the following steps of: (1) adding at least one of titanium tetrachloride, titanium sulfate or butyl titanate into an alcohol diluting solvent of between 1 and 10 folds (m / m) under the condition of stirring and stirring the mixed solution evenly; (2) at a water bath temperature of between 5 and 95 DEG C, gradually adding an ammonium metavanadate aqueous solution of between 1 and 500 folds (m / m) into the mixed solution obtained in the step (1), with stirring for 0.5-5 hours; (3) standing and aging the sol for 1 hour to 15 days to obtain a stable composite sol. The doping type titanium dioxide contained in the vanadium doped visible light response titanium dioxide nano crystal composite sol has a super oxidizing capacity under the illumination of sunlight and a sun lamp to destroy the proteins of bacteria and decompose organisms and harmful gases, thereby preventing fouling, sterilizing, self-cleaning and purifying air.

Description

technical field [0001] The invention relates to a method for preparing a sol, more specifically, the invention relates to a method for preparing a vanadium-doped visible light-responsive titanium dioxide nanocrystal composite sol. Background technique [0002] Titanium dioxide is an important photoelectric functional material. Its photocatalysis has been widely used in deodorization and antibacterial, air purification, water treatment, self-cleaning and other fields. It has great significance in solar energy utilization and environmental purification, and has broad development prospects. However, the utilization efficiency of titanium dioxide to sunlight is still low due to its own energy band limitation. In addition, the thin-film photocatalytic material, which is an important application form, is also difficult to load and apply on large-area substrates that are not heat-resistant or difficult to heat due to the limitation of the titanium dioxide crystallization process. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/624C01G23/053B01J21/06B01J23/22B01J37/03C30B29/16
Inventor 申乾宏杨辉高基伟
Owner ZHEJIANG UNIV
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