1. Photocatalytic activity of ZnWO4 phosphors doped with Li impurities.
- Author
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Xiong, Guang-Ting, Zhang, Wei, Hu, Zheng-Fa, Hu, Pei-Ju, Pan, Yong-Man, Feng, Zu-Yong, Ma, Lun, Wang, Yin-Hai, and Luo, Li
- Subjects
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PHOTOCATALYSIS , *PHOSPHORS , *LITHIUM , *METAL inclusions , *INORGANIC synthesis , *LUMINESCENCE - Abstract
Abstract Zn 1-x WO 4 :xLi+ (x = 0, 0.02, 0.05, 0.1) phosphors were synthesized by high-temperature solid-state method. The structural and luminescence properties of the samples were investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), Microconfocal Raman spectrometer(MR), Diffuse reflectance spectra (DRS) and Photoluminescence spectra. The Li-doped ZnWO 4 phosphors show photoluminescence with a broad band. Compared with the pure ZnWO 4 , the band gap of lithium doped samples shows a red shift measured by Diffuse reflectance spectra (DRS), which could be attributed to the doping effects. Moreover, photocatalytic activity test shows that the Li-doped ZnWO 4 phosphors exhibit higher catalytic activities than the pure ZnWO 4 for the degradation of Rhodamine B by the UV irradiation. The result shows that the Li-doped phosphors can enhance light harvest capability to generate more electron-hole pairs, and act as a trap center by decreasing the recombination of photogenerated electrons and holes. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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