Characterization and properties of Eu3+-doped CdWO4 prepared by a hydrothermal method
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Eu3+-doped CdWO4 was prepared for the first time by a hydrothermal method. The structure, morphology, and luminescence of the Eu3+-doped CdWO4 were characterized. TEM results revealed that the pure CdWO4 was a nanorod with a width of about 50 nm. The photoluminescent properties of Eu3+-doped CdWO4 complexes indicated energy transfer from WO4 2− groups to Eu3+ and suggested effective doping of Eu3+ into the lattice of CdWO4. The photocatalytic activity of CdWO4 and Eu3+-doped CdWO4 was investigated by the photodegradation of methyl orange (MO). Eu3+-doped CdWO4 had enhanced photocatalytic activity in the photodegradation of MO. The hydroxyl radical was detected by the terephthalic acid photoluminescence (TA-PL) method, and the regular change revealed that the hydroxyl radical may be the active species.
KeywordsPhotoactivity Doping Methyl orange Eu3+–CdWO4 Hydroxyl radical
This work was financially supported by the National Natural Science Foundation of China (20677010 and 20873023), An “863” Project from the MOST of China (2006AA03Z340), the National Basic Research Program of China (973 Program, 2007CB613306), and the Natural Science Foundation of Fujian, China (2007F5066, 0330-033064, 0330-033070, and JA07001).
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