Journal
APPLIED SURFACE SCIENCE
Volume 324, Issue -, Pages 505-511Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2014.10.168
Keywords
BiVO4; Sm3+ doping; Structural transformation; Photocatalytic activity
Categories
Funding
- Project of the National Natural Science Foundation of China [51172135]
- Graduate Innovation Fund of Shaanxi University of Science Technology [SUST-A04]
- Academic Leaders Funding Scheme of Shaanxi University of Science Technology [2013XSD06]
- State-Level College Students' Innovation and Entrepreneurship Training Program for Local Colleges and Universities [201310708003]
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A series of Sm3+ doped BiVO4 photocatalysts with high photocatalytic efficiency were successfully synthesized by a microwave hydrothermal method. The effects of Sm3+ doping on the crystal structure, morphology, optical absorption and photocatalytic activity were investigated systematically. From the structural characterization of photocatalysts, the incorporation of Sm3+ into BiVO4 could induce the stabilization of tetragonal phase. Meanwhile, the morphology and grain size show an obvious change with doping Sm3+ ions. The Sm3+ doped BiVO4 with the optical absorption in UV-light range would accelerate more photogenerated electron-hole pairs, which is in favor of the improvement of photocatalytic activity. The best photocatalytic performance is obtained for the 6at% Sm3+ doped BiVO4, of which the degradation rate of Rhodamine B (RhB) can reach to 96% after 120 min simulated sun-light irradiation. Moreover, the photocurrent results indicate that the obviously enhanced photocatalytic activity of Sm3+ doped BiVO4 can be attributed to the efficient separation of photogenerated electron-hole pairs. (C) 2014 Elsevier B.V. All rights reserved.
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