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Process for preparing visible light absorbable titanium dioxide and its composite materials

A technology of titanium dioxide and composite materials, which is applied in the direction of fibrous fillers, etc., can solve the problem that no titanium dioxide material has visible light activity, and achieve the effects of improving photoelectric conversion efficiency and photocatalytic performance, good ultraviolet light absorption performance, and broadening spectral absorption

Inactive Publication Date: 2005-11-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to prepare titanium dioxide materials with visible light activity, ion doping, ion implantation and dye sensitization are all effective methods, but the research on introducing visible light absorption by controlling the shape of titanium dioxide nanocrystals has not been reported so far. Shape control studies also did not make titania material visible light active

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 20g of isopropyl titanate in 30g of methanol, add 20g of acetic acid and 4.5g of distilled water, then react at room temperature for 2 hours, add 1g of tetrahydrofuran, heat treat at 700°C for 10 hours after coating, and obtain a titanium dioxide film with visible light absorption.

Embodiment 2

[0029] Dissolve 1 g of ethyl orthosilicate in 50 g of ethanol, then add 0.7 g of 5% hydrochloric acid solution and react at room temperature for 2 hours to obtain a silica sol. Add 1200g n-butyl titanate to 2000g ethanol, then add silica sol, react at room temperature for 2 hours, add 2g tetrahydrofuran to this solution, and obtain titanium dioxide inorganic composite sol with visible light absorption.

Embodiment 3

[0031] Put 1g of titanium tetrachloride solution in 3000g of ethanol, then add 1000g of aluminum isopropoxide, react at room temperature for 5 hours, add 10g of 5% polymethyl methacrylate in tetrahydrofuran solution, stir for 5 minutes, then vacuum treat at 100°C for 10 hours , to obtain a titanium dioxide composite material with visible light absorption.

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PUM

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Abstract

The invention provides a process for preparing titanium dioxide and its composite materials, which comprises preparing titanium oxide through sol-gel method or non-water sol-gel method, charging tetrahydrofuran into the titanium dioxide solution, compounding the obtained titanium dioxide and inorganics or / and polymer. The obtained titanium dioxide and composite material have strong capability of absorbing ultraviolet radiation and visible light.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide with visible light absorption and its composite material Background technique [0002] Titanium dioxide semiconductor material has attracted more and more research interest because of its high refractive index, strong ultraviolet light absorption, excellent photoelectric conversion performance and photocatalytic performance. The photoelectric conversion and photocatalytic ability of titanium dioxide mainly depends on its ability to absorb light energy. In order to increase the material's surface area and thus its ability to absorb light, titanium dioxide often needs to be made into particles as small as nanometers in size. The nanoparticles of titanium dioxide in various crystal forms (anatase, rutile, etc.) are transparent in the visible light region, and only have strong absorption in the ultraviolet region. However, in the solar spectrum, the content of ultraviolet rays is very low, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36
Inventor 王海涛孟晟钟伟杜强国
Owner FUDAN UNIV