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Method for preparing stannum-titanium coextruded film

A composite film, tin-titanium technology, applied in the field of preparation of tin-titanium composite film, can solve the problems of titanium oxide film formation, limit the application field of titanium oxide, etc., achieve the effect of optimizing self-cleaning and hydrophilic properties, and enhancing the catalytic effect of visible light

Inactive Publication Date: 2009-08-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many researchers have increased the utilization of visible light by ion doping and semiconductor recombination, but heat treatment is required. Therefore, the existing preparation methods are difficult to make titanium oxide in heat-resistant (such as plastic) or difficult to heat ( Film formation on substrates such as walls greatly limits the application fields of titanium oxide

Method used

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  • Method for preparing stannum-titanium coextruded film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Add excessive ammoniacal liquor in tin tetrachloride solution, react and obtain tin hydroxide, after filtering, washing, add water and form peptization, the mass ratio of water and tin tetrachloride is 1, leave standstill aging 1 hour, To obtain the tin oxide sol, adjust the pH value of the tin oxide sol to 0.1 with hydrochloric acid;

[0019] (2) Under stirring conditions, add butyl titanate to absolute ethanol for dilution, the mass ratio of absolute ethanol to butyl titanate is 1, stir evenly to obtain butyl titanate ethanol solution;

[0020] (3) Add the butyl titanate ethanol solution dropwise to the tin oxide sol, the mass ratio of the tin oxide sol to the butyl titanate ethanol solution is 50, fully react at a water bath temperature of 5°C, and then let stand for 5 hours , to obtain tin-titanium in-situ composite sol;

[0021] (4) Take the tin-titanium in-situ composite sol, roll-coat it on a rubber coil to form a film, and dry it at 120° C. to obtain a tin-...

Embodiment 2

[0023] (1) Add excessive sodium hydroxide in tin tetrachloride solution, react and obtain tin hydroxide, after filtering, washing, add water to form peptization, the mass ratio of water and tin tetrachloride is 500, leave standstill aging 50 Hour, obtain tin oxide sol, adjust the pH value of tin oxide sol with sulfuric acid to be 5;

[0024] (2) under stirring condition, titanium tetrachloride is added in ethylene glycol and diluted, and the mass ratio of ethylene glycol and titanium tetrachloride is 10, stirs and obtains titanium tetrachloride ethylene glycol solution;

[0025] (3) Titanium tetrachloride ethylene glycol solution is added dropwise in tin oxide sol, the mass ratio of tin oxide sol and titanium tetrachloride ethylene glycol solution is 500, after fully reacting at 95 ℃ of water bath temperature, then Stand still for 1 hour to obtain tin-titanium in-situ composite sol;

[0026] (4) Take the tin-titanium in-situ composite sol, spray it on the exterior wall of the...

Embodiment 3

[0028] (1) Add excessive ammoniacal liquor in tin tetrachloride solution, react and obtain tin hydroxide, after filtering, washing, add water and form peptization, the mass ratio of water and tin tetrachloride is 80, leave standstill aging 5 hours, Obtain tin oxide sol, adjust the pH value of tin oxide sol with nitric acid to be 2.5;

[0029] (2) Under stirring conditions, dilute butyl titanate by adding isopropanol, the mass ratio of isopropanol to butyl titanate is 3, stir evenly to obtain butyl titanate isopropanol solution;

[0030] (3) Add butyl titanate isopropanol solution dropwise to tin oxide sol, the mass ratio of tin oxide sol to butyl titanate isopropanol solution is 100, fully react at 35°C water bath temperature, then Stand still for 20 hours to obtain tin-titanium composite sol in situ;

[0031] (4) Take the tin-titanium in-situ composite sol, cast it on glass to form a film, and dry it at 50° C. to obtain a tin-titanium composite film.

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Abstract

The method for preparing a tin-titanium composite thin film disclosed by the invention adopts an in-situ composite sol method, and the steps include: preparing a tin oxide sol with a tin tetrachloride solution; adding titanium salt into an alcohol solvent for dilution to prepare a titanium salt alcohol solution; The titanium salt alcohol solution is added dropwise to the tin oxide sol, reacted in a water bath to obtain the tin-titanium in-situ composite sol; then the tin-titanium in-situ composite sol is coated on the substrate to form a film, and dried. By adopting the preparation method of the present invention, a photocatalytic film can be formed on the surface of various substrates (especially heat-labile plastics, awning films, or building walls that are difficult to heat) at normal temperature or at a low temperature below 120°C. With enhanced visible light catalysis, optimized self-cleaning and hydrophilic properties.

Description

technical field [0001] The invention relates to a preparation method of a tin-titanium composite thin film, in particular to a preparation method of a tin-titanium composite thin film capable of forming a film at low temperature and having high catalytic efficiency of visible light. 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 ion doping and semiconductor recombination, but heat treatment is required. Therefore, the existing preparation methods are difficult to make titanium oxide in heat-resistant (such as plastic) or difficult to heat ( Film formation on substrates such as walls greatly limits the application fields of titanium oxide. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/14B01J21/06C09D1/00
Inventor 高基伟申乾宏蔡振钱
Owner ZHEJIANG UNIV