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]

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

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