A new method for determination of self-cleaning activity of photocatalytic surfaces is proposed. It is based on the deposition of a transparent solid layer comprising terephthalic acid over the photocatalytic surface (three types of titania films on glass were used as test samples). When such a system was irradiated, among the other degradation products also a hydroxyterephthalic acid was formed due to a reaction between photoexcited TiO2 and terephthalic acid. Hydroxyterephthalic acid is a highly fluorescent molecule and it was detected by HPLC-FLD or spectrofluorimeter. This direct method of following quantitatively the formation of an oxidation product was found to be accurate, highly sensitive and reproducible, therefore, it represents a promising option to be considered in standardization efforts in the field of photocatalysis. (C) 2010 Elsevier B.V. All rights reserved.
机构:
Kanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, JapanKanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan
Fujishima, Akira
Zhang, Xintong
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NE Normal Univ, Ctr Adv Optoelect Funct Mat Res, Changchun 130024, Peoples R ChinaKanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan
Zhang, Xintong
Tryk, Donald A.
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机构:
Univ Yamanashi, Fuel Cell Nonomat Ctr, Yamanashi 4008510, JapanKanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan
机构:
Kanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, JapanKanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan
Fujishima, Akira
Zhang, Xintong
论文数: 0引用数: 0
h-index: 0
机构:
NE Normal Univ, Ctr Adv Optoelect Funct Mat Res, Changchun 130024, Peoples R ChinaKanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan
Zhang, Xintong
Tryk, Donald A.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Yamanashi, Fuel Cell Nonomat Ctr, Yamanashi 4008510, JapanKanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan