Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5352040 | Applied Surface Science | 2017 | 39 Pages |
Abstract
A new kind of hierarchical Pd-Bi2WO6 architecture decorated with different molar ratios of Pd to Bi, has been fabricated by a hydrothermal process, followed by a chemical deposition method. The photocatalytic activities of the pure Bi2WO6 and Pd-Bi2WO6 nanocatalyst were examined in the degradation of Rhodamine B (RhB) dyes and phenol under visible light. The photocatalytic results showed that the Pd-Bi2WO6 nanocomposites possessed observably enhanced photocatalytic activities. Particularly, the 2.0% Pd loaded Bi2WO6 had the highest photocatalytic activity, exhibiting a nearly complete degradation of 30Â mg/L RhB and 10Â mg/L phenol within only 50 and 60Â min, respectively. In addition, the trapping experiment results indicated that the photo-generated holes (h+) and O2â played a crucial role in the degradation of RhB. According to the experimental results, the photocatalytic degradation mechanism of Pd-Bi2WO6 was also proposed. The enhanced photocatalytic activities were ascribed to the combined effects of the highly efficient separation of electrons and holes, improved visible light utilization and increased BET specific surface areas of the Pd-Bi2WO6 nanocomposites.
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Authors
Jinniu Zhang, Tianhua Chen, Hongbing Lu, Zhibo Yang, Feng Yin, Jianzhi Gao, Qianru Liu, Yafang Tu,