Enhanced photocatalytic activity of TiO2 by surface fluorination in degradation of organic cationic compound

Experiments were carried out to investigate the influence of TiO2 surface fluorination on the photodegradation of a representative organic cationic compound, Methylene Blue （MB）. The eleetropositive MB shows poor adsorption on TiO2 surface; its degradation performs a HO. radical-mediated mechanism....

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Bibliographic Details
Published in:	Journal of environmental sciences (China) Vol. 19; no. 1; pp. 86 - 89
Main Authors:	Yang, Shi-ying, Chen, You-yuan, Zheng, Jian-guo, Cui, Ying-jie
Format:	Journal Article
Language:	English
Published:	Netherlands 2007
Subjects:	Adsorption Catalysis Cations Fluorine - chemistry Kinetics Organic Chemicals - chemistry Photochemistry Titanium - chemistry Ultraviolet Rays 二氧化钛光催化作用吸附作用有机化合物氟化作用空气污染
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Summary:	Experiments were carried out to investigate the influence of TiO2 surface fluorination on the photodegradation of a representative organic cationic compound, Methylene Blue （MB）. The eleetropositive MB shows poor adsorption on TiO2 surface; its degradation performs a HO. radical-mediated mechanism. In the F-modified system, the kinetic reaction rate enlarged more than 2.5 fold that was attributed mainly to the accumulating adsorption of MB and the increased photogenerated hole available on the F-modified TiO2 surface.
Bibliography:	adsorption photogenerated hole X51 photocatalysis mechanism Methylene Blue（MB） photocatalysis; mechanism; adsorption; surface fluorination; photogenerated hole; Methylene Blue（MB） surface fluorination 11-2629/X ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1001-0742 1878-7320
DOI:	10.1016/s1001-0742(07)60014-x