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Fluorine doped-anatase type TiO2 collosol photo catalyst preparation method

An anatase type, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve low investment, good stability, and stable properties

Inactive Publication Date: 2010-11-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the titania sol currently used still has the following disadvantages: 1. The titania nanoparticles in the sol are mostly amorphous structure, and the catalytic activity of this structure is low; 2. .Although the catalyst has good activity under ultraviolet light irradiation, it has low visible light activity
However, the crystallinity of TiO2 particles in the sol catalyst prepared by these methods is low, and the visible light activity is far from the expected level.

Method used

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  • Fluorine doped-anatase type TiO2 collosol photo catalyst preparation method
  • Fluorine doped-anatase type TiO2 collosol photo catalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Gained sol is added in the solution that contains organic matter as shown in Table 1, makes titanium dioxide content be 0.1%; With 160W high-pressure mercury lamp (dominant wavelength 365nm) as light source irradiation after 6 hours, initial concentration is the degradation of 5mg / L Rhodamine B The rate is 79%; after irradiating for 12 hours, the degradation rate of rhodamine B reaches over 99%. It can be seen that the fluorine-doped anatase TiO prepared in this example 2 Sol has higher catalytic activity.

[0038] Example 2

Embodiment 2

[0040] The catalytic activity evaluation conditions were the same as in Example 1, the solution was irradiated with a light source for 6 hours, and the degradation rate of Rhodamine B by the sol was 63% (see Table 1).

[0041] Example 3

Embodiment 3

[0043] The catalytic activity evaluation conditions are the same as those in Example 1. The solution was irradiated with a light source for 6 hours, and the degradation rate of Rhodamine B by the sol was 81% (see Table 1).

[0044] Embodiment 4~6

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Abstract

A multiple elements doped anatase-type TiO2 sol photocatalyst features that its solvent is water or the mixture of water and unitary or binary alcohol, and its sol contains non-metal doped anatase-type TiO2 nanoparticles, and has a formula: TiO2-x-yAxBy, where x=0.0-0.1, y=0.0-0.1 and A or B is one or more of non-metal halogens or N-family elements. Its preparing process includes such steps as hydrolyzing organic or inorganic Ti source, doping, dispergating, and hydrothermal crystallizing.

Description

technical field [0001] The invention relates to nanomaterial preparation technology, in particular to a fluorine-doped anatase TiO 2 Sol photocatalyst, specifically relates to a kind of anatase type TiO with non-metallic doping 2 The invention discloses a preparation method of a sol photocatalyst. The catalyst can undergo a photocatalytic reaction under the irradiation of ultraviolet light and visible light, and can be applied to the field of environmental protection. Background technique [0002] As an important inorganic functional material, titanium dioxide is used in many fields such as modern industry and agriculture, national defense and science and technology. Since the discovery in 1972 that titanium dioxide photocatalytically decomposed water to produce hydrogen, its photocatalytic performance has attracted people's attention. Titanium dioxide has three crystal forms: anatase, rutile and brookite, among which anatase-type titanium dioxide has higher photocatalyti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06
Inventor 宋慧宇廖世军黄冬根
Owner SOUTH CHINA UNIV OF TECH
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