Surface properties and photoactivity of TiO 2 treated with electron beam

• Published in: Radiation physics and chemistry (Oxford, England : 1993) Vol. 75; no. 5; pp. 583 - 589
• Main Authors: Jun, Jin, Dhayal, Marshal, Shin, Joong-Hyeok, Kim, Jo-Chun, Getoff, Nikola
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2006
• Subjects: Electron beam irradiation of TiO 2; Testing methods for TiO 2 activity; TiO 2 photoactivity improvement; TiO 2 photocatalyst; Testing methods for TiO 2 activity; Electron beam irradiation of TiO 2; TiO 2 photoactivity improvement; TiO 2 photocatalyst
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/j.radphyschem.2005.10.015

The improvement of the TiO 2-photoactivitiy by electron beam treatment (1 MeV) as a function of the absorbed radiation dose (MGy) is reported. The radiation-induced effects in the TiO 2 crystal structure, e.g. change of the Ti 3+/Ti 4+ ratio, increase of the photoactivity, etc. were investigated. Three methods were implemented in this respect: for the change of the TiO 2 crystal structure X-ray photoelectron spectroscopy and photoluminescence spectroscopy were applied. The photocatalytic activity of the EB-treated TiO 2 was tested by taking the degree of methylene blue photodegradation as a measure of the achieved effect. The obtained experimental data of all testing methods showed that in TiO 2 at an absorbed dose of 0.5 MGy optimum changes in crystal structure of the catalyst occur, resulting in the highest photocatalytic efficiencies.