Open AccessPhotocatalytic Properties of Columnar NanostructuredTiO 2
Author(s) -
Zhengcao Li,
Liping Xing,
Zhengjun Zhang
Publication year - 2012
Publication title -
advances in materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 42
eISSN - 1687-8442
pISSN - 1687-8434
DOI - 10.1155/2012/413638
Subject(s) - materials science , anatase , annealing (glass) , photocatalysis , sputtering , rutile , argon , analytical chemistry (journal) , chemical engineering , thin film , nanotechnology , composite material , organic chemistry , chemistry , engineering , catalysis
Columnar nanostructured TiO2 films were prepared by sputtering Ti target in pure argon with glancing angle deposition (GLAD) and subsequent annealing at 400°C for different hours in air. Compared with sputtering TiO2 target directly, sputtering Ti target can be carried out under much lower base pressure, which contributes to obtaining discrete columnar nanostructures. In the present study, TiO2 films obtained by annealing Ti films for different hours all kept discrete columnar structures as the Ti films deposited in GLAD regime. The longer the annealing time was, the better the phase transition accomplished from Ti to TiO2 (a mixture of rutile and anatase), and the better it crystallized. In addition, those TiO2 films performed photocatalytic decolorization effectively and showed a law changing over annealing time under UV light irradiation towards methyl orange, which demonstrated the potential applications for treatment of effluent
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