1. Enhanced visible light photocatalytic activity of ZnO doped with down-conversion NaSrBO3:Tb3+ phosphors.
- Author
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Xinjuan Liu, Xiaojun Wang, Huili Li, Jinliang Li, Likun Pan, Jing Zhang, Guoquan Min, Zhuo Sun, and Changqing Sun
- Subjects
PHOTOCATALYSIS ,VISIBLE spectra ,CATALYTIC activity ,ZINC oxide ,PHOSPHORS ,SODIUM compounds - Abstract
ZnO-NaSrBO
3 :Tb3+ (ZNT) composites were successfully synthesized via microwave-assisted reaction of the ZnO precursor with a NaSrBO3 :Tb3+ suspension using a microwave synthesis system. The morphology, structure and photocatalytic performance in the degradation of methylene blue (MB) were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy, fluorescence spectrophotometry and electrochemical impedance spectroscopy, respectively. The results show that the ZNT composites exhibit enhanced photocatalytic activity in the degradation of MB with a maximum degradation rate of 97% under visible light irradiation compared with pure ZnO (12%), which is ascribed to the increased light absorption and the reduction of photoelectron-hole pair recombination in ZnO with the introduction of NaSrBO3 :Tb3+ , as well as the light down-converting effect of NaSrBO3 :Tb3+ , which facilitates the self-sensitized degradation of MB. [ABSTRACT FROM AUTHOR]- Published
- 2015
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