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Materials Technology
Advanced Performance Materials
Volume 31, 2016 - Issue 7
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Research Paper

Improved photocatalytic activity of cerium doped TiO2 films prepared by microarc oxidation

J. J. ZhuangSchool of Materials Science and Engineering, Changzhou University, Changzhou213164, China;Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou213164, China
,
N. XiangSchool of Materials Science and Engineering, Changzhou University, Changzhou213164, China;Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou213164, China
,
X. Y. LuSchool of Materials Science and Engineering, Changzhou University, Changzhou213164, China;Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou213164, China
,
B. XiangCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou310032, China
,
Y. XiongCollege of Mechanical Engineering, Zhejiang University of Technology, Hangzhou310032, China
&
R. G. SongSchool of Materials Science and Engineering, Changzhou University, Changzhou213164, China;Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou213164, ChinaCorrespondence[email protected]
Pages 416-422 | Received 03 Jul 2015, Accepted 22 Aug 2015, Published online: 26 Feb 2016
 
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Abstract

Cerium doped TiO2 films were synthesised by microarc oxidation (MAO) process on pure titanium. The suitable condition for MAO treatment were first investigated under various concentration of electrolytes, then the doping process was carried out in the suitable concentration of electrolytes with MAO. The characterisations of MAO-TiO2 and cerium doped MAO-TiO2 films were studied by means of scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy. The photocatalytic activity of the films was evaluated by decolourisation of methylene blue in aqueous solution as a model pollutant under sunlight irradiation simulation with homemade ultraviolet–visible spectroscopy. The results showed that the photocatalytic activity of MAO-TiO2 films first increased and then decreased with the concentration of electrolytes. Moreover, after doping, the cerium doped MAO-TiO2 films were of evidently improved photocatalytic activity than that of the MAO-TiO2 films.

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