期刊
APPLIED SURFACE SCIENCE
卷 333, 期 -, 页码 39-47出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.02.008
关键词
Manganese doped SrTiO3; Hydrothermal method; Photocatalytic degradation; Tetracycline
类别
资金
- National Natural Science Foundation of China [21276116, 21477050, 21301076, 21303074]
- Excellent Youth Foundation of Jiangsu Scientific Committee [BK20140011]
- Program for high-level innovative and entrepreneurial talents in Jiangsu Province, Program for New Century Excellent Talents in University [NCET-13-0835]
- Henry Fok Education Foundation [141068]
- Six Talents Peak Project in Jiangsu Province [XCL-025]
Visible-light-driven manganese doped SrTiO3 nanocubes with various manganese atomic percentages in the range of 3-7%, were prepared by a hydrothermal method. These obtained photocatalysts were systematically characterized by XRD, EDX, TEM, STEM, XPS, UV-vis, PL, EIS. The results demonstrated that the Mn4+ has substituted into the lattice of SrTiO3 nanocubes and the absorption onset shifted toward the visible region. It is beneficial to the photocatalytic degradation of tetracycline under the visible light irradiation. Interestingly, the optimal doping atomic percentages at 5% exhibited the highest degradation rates (66.7%) in 60 min. The high photocatalytic activity could be ascribed to the Mn doping adjustment the energy band of SrTiO3 and the highly effective separation of photo-generated electron-hole pairs. Furthermore, the possible photocatalytic mechanism has been discussed based on the active species trapping experiments and ESR analysis. (C) 2015 Elsevier B.V. All rights reserved.
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