Journal
APPLIED SURFACE SCIENCE
Volume 404, Issue -, Pages 282-290Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.01.294
Keywords
Bi2WO6; Pd; Nanocomposites; Photocatalytic activity
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Funding
- National Natural Science Foundation of China [11574189, 11105047, 11304124]
- Science and Technology Program of Shaanxi Province [2016KJXX-15]
- Fundamental Research Funds for the Central Universities [GK201602006, GK201501004, GK201603018]
- Scientific Research Staring Foundation of the Education Ministry for Returned Chinese Scholars
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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 photo catalytic 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 30 mg/L RhB and 10 mg/L phenol within only 50 and 60 min, respectively. In addition, the trapping experiment results indicated that the photo-generated holes (hi) and center dot O-2(-) 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. (C) 2017 Elsevier B.V. All rights reserved.
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