Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 685, Issue -, Pages 647-655Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.05.260
Keywords
SnNb2O6 nanosheets; Metal nanoparticles; Plamonic photocatalyst; Mechanism
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Funding
- National Nature Science Foundation of China [21406091, 21576121]
- Natural Science Foundation of Jiangsu Province [BK20140530, BK20150482]
- China Postdoctoral Science Foundation [2015M570409]
- College Natural Science Research Program of Jiangsu Province [13KJB610003]
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In this work, novel metal nanoparitcles/SnNb2O6 nanosheets(metal = Ag, Au, and Pd) plasmonic nanocomposite photocatalysts with strong interfacial interaction were successfully constructed. The metal/SnNb2O6 nanocomposites exhibit significantly enhanced visible light photocatalytic performance toward the degradation of methylene blue (MB) as compared to bare SnNb2O6. The highest photocatalytic activity was achieved over the Au/SnNb2O6 nanocomposite with Au content of 2 wt%, which was about 2.3 times higher than bare SnNb2O6. This enhancement in photocatalytic activity could be ascribed to the low recombination rate of the electron-hole pairs because of the Schottky junction formed between Au and SnNb2O6. The photocatalytic activity trend follows the order Au/SnNb2O6 > Ag/SnNb2O6 > Pd/SnNb2O6. In addition, it was demonstrated that the superoxide radicals are the main photoactive species toward photocatalytic degradation of MB over the metal/SnNb2O6 nanocomposites. (C) 2016 Elsevier B.V. All rights reserved.
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