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 electropositive 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.
Yang
Shi-ying
SY
Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China. shiningpup@hotmail.com
Chen
You-yuan
YY
Zheng
Jian-guo
JG
Cui
Ying-jie
YJ
D000327:Adsorption; D002384:Catalysis; D002412:Cations; D005461:Fluorine / Q000737:chemistry*; D007700:Kinetics; D009930:Organic Chemicals / Q000737:chemistry*; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
D002412:Cations; D009930:Organic Chemicals; C009495:titanium dioxide; D005461:Fluorine; D014025:Titanium