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Method of producing original position complex sol of tin and titanium

A technology of in-situ compounding and tin oxide sol, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of weak photocatalytic ability and achieve Avoid high temperature heat treatment and enhance the effect of visible light catalytic effect

Inactive Publication Date: 2007-09-12
ZHEJIANG UNIV
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Problems solved by technology

The prepared sol contains anatase crystals grown in situ, so the sol directly has photocatalytic activity, avoiding the high temperature heat treatment in the traditional process, but its ability to catalyze visible light is weak

Method used

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  • Method of producing original position complex sol of tin and titanium

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Embodiment Construction

[0016] The present invention will be described in detail below through specific examples.

[0017] A preparation method of tin-titanium in-situ composite sol, comprising the following steps:

[0018] (1) Add excess alkali to the tin tetrachloride solution to react to obtain tin hydroxide, filter and wash the obtained tin hydroxide powder, add water peptization with 1 to 500 times the mass of the tin hydroxide powder And standing and aging for 1 hour to 15 days to obtain tin oxide sol;

[0019] (2) Add mineral acid to the tin oxide sol obtained in step (1), so that the pH value of the tin oxide sol is 0.1~5;

[0020] (3) Add at least one of titanium tetrachloride, titanium sulfate or butyl titanate into an alcohol dilution solvent of 1 to 10 times the mass under stirring conditions, stir evenly to obtain a solution, and add the solution dropwise to 1 to 10 times the mass of alcohol dilute solvent. 500 times the mass of the solution obtained in step (2) which was continuously ...

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Abstract

The present invention relates to preparation process of photocatalytic sol, and is especially preparation process of composite in-situ Sn-Ti sol. The preparation process includes the following steps: 1. adding excessive alkali into tin tetrachloride solution to react to obtain tin hydroxide, and adding the product into water and letting stand to obtain tin oxide sol; 2. adding inorganic acid into the obtain tin oxide sol to regulate the pH value to 0.1-5; and 3. adding at least one of titanium tetrachloride, titanium sulfate or butyl titanate into dilute alcohol solution via stirring to obtain solution, dropping the solution into the sol obtained in the step 2 at 5-95 deg.c in water bath via stirring, and letting stand to age to obtain the composite in-situ Sn-Ti sol. The composite in-situ Sn-Ti sol has strengthened visible catalysis effect.

Description

technical field [0001] The invention relates to a preparation method of photocatalytic sol, more specifically, relates to a preparation method of visible light catalyzed tin-titanium in-situ composite sol. Background technique [0002] Titanium oxide has good application prospects in the fields of energy and environmental protection; pure titanium oxide must be excited by ultraviolet light, and the utilization rate of daily visible light is low. Many researchers have increased the utilization of visible light by titanium oxide through ion doping, semiconductor compounding, etc.; but its heat treatment process greatly limits the application method and scope of titanium oxide, making it difficult to heat-resistant (such as plastic) or difficult to heat. (such as walls) field applications. [0003] The applicant is Zhejiang University, and the invention patent with application number CN200510061118.6 describes a method for preparing titanium oxide sol with photocatalytic prope...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J21/06
Inventor 杨辉高基伟申乾宏蔡振钱
Owner ZHEJIANG UNIV