期刊
SOLID STATE SCIENCES
卷 46, 期 -, 页码 27-32出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2015.05.007
关键词
TiO2; Cobalt doping; Photocatalytic activity; First principle calculation
资金
- National Natural Science Foundation of China [51402016]
- Fundamental Research Funds for the Central Universities [FRF-TP-14-007A1]
- [BZZ14J001]
To extend the optical response to visible light region, cobalt doped TiO2 (Co-doped TiO2) with dopant concentration of 0.1 %-3.0 at % was synthesized by one step hydrothermal method without any post-heat treatment for crystallization. X-ray diffraction results confirm that all the doped and undoped TiO2 were composed of pure anatase phase with good crystallinity. The calculated grain size was ranged from 8.4 to 10.5 nm by Scherrer's method. The photocatalytic activities of the synthesized samples were evaluated by degradation of phenol under visible light irradiation. The Co-doped TiO2 sample with dopant concentration of 0.3 at% shows the highest degradation ratio. First principle calculations were performed and the results revealed that cobalt doping could realize its visible light response and enhance the photocatalytic performance of TiO2 by introducing impurity states in its band gap. (C) 2015 Elsevier Masson SAS. All rights reserved.
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