Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 183, Issue -, Pages 113-123Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2015.10.022
Keywords
g-C3N4; SnNb2O6; 2D/2D heterostructures; Synergistic effect; Photocatalysis
Funding
- National Nature Science Foundation of China [21406091, 21576121]
- Natural Science Foundation of Jiangsu Province [BK20140530, BK20150482]
- Science and Technology Support Program of Nantong City [AA2014022]
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In this study, novel SnNb2O6/g-C3N 2D/2D nanosheet heterostructures with strong interfacial interaction were successfully constructed by a facile two-step wet chemistry method. The SnNb2O6/g-C3N4 2D/2D heterostructures exhibit distinctly enhanced visible light photocatalytic performance toward the degradation of methylene blue (MB) as compared to pristine g-C3N4 and SnNb2O6, which can be attributed to the synergistic effect of 2D/2D heterostructures with strong interfacial interaction and abundant 2D coupling interfaces, facilitating efficient charge separation. The optimum photocatalytic activity of 30% SnNb2O6/g-C3N4 heterostructure for the degradation of MB was about 3.9 and 3.2 times higher than those of g-C3N4 and SnNb2O6. It was demonstrated that the photogenerated holes and superoxide radicals are the two main photoactive species toward photocatalytic degradation of MB over the SNO/CN heterostructures. This work may provide some inspiration for the fabrication of 2D/2D nanosheet heterostructures with efficient photocatalytic performance. (C) 2015 Elsevier B.V. All rights reserved.
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