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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 5
BKCSDE 34(5)
May 20, 2013 

Enhanced Photocatalytic Activity of TiO2 Modified by e-Beam Irradiation
Moon Su Kim, Won Jun Jo, Dowon Lee, Sung-Hyeon Baeck*, Joong Hyeock Shin, Byung Cheol Lee
Photoelectrochemical cell, e-beam, TiO2, Hydrogen, Anodizing
The influence of electron beam irradiation on photocatalytic activity of TiO2 thin films was investigated. TiO2 thin films were prepared by anodization of Ti foil, and they were then subjected to an 1 MeV electron beam. Changes in physical properties and photocatalytic activity of TiO2 before and after e-beam irradiation were investigated. The crystallinity of the synthesized materials was investigated by X-ray diffraction, and the oxidation states of both titanium and oxygen were determined by X-ray photoelectron spectroscopy (XPS). The density of donor (Nd) and flat band potential (Efb) were investigated by Mott-Schottky analysis, and photocurrent was measured under a 1kW Xenon lamp illumination. After e-beam irradiation, significant change of Ti oxidation state was observed. Ti3+/Ti4+ ratio increased mainly due to the surface reduction by electron, and photocurrent was observed to increase with e-beam irradiation.
1397 - 1400
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