Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 201, Issue -, Pages 617-628Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2016.09.001
Keywords
K+Ca2Nb3O10-; g-C3N4; Ultrathin nanosheets; Heterojunction; Synergistic effect
Funding
- National Nature Science Foundation of China [21406091, 21576121, 21606111]
- Natural Science Foundation of Jiangsu Province [BK20140530, BK20150482]
- China Postdoctoral Science Foundation [2015M570409]
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Novel visible-light-driven 2D-2D heterojunction photocatalysts was constructed, based on 2D g-C3N4 and exfoliated ultrathin K+Ca2Nb3O10- nanosheets, which is derived from Dion-Jacobson phase layer perovskites. The photocatalytic performance of the 2D-2D g-C3N4/K+Ca2Nb3O10- nanosheet heterojunctions was evaluated by the degradation of tetracycline hydrochloride under visible light irradiation. Compared with bare K+Ca2Nb3O10- and g-C3N4, the g-C3N4/K+Ca2Nb3O10- nanosheet heterojunctions exhibited considerably enhanced photocatalytic activity towards the degradation of tetracycline hydrochloride, which is about 6.6 and 1.8 times higher than that of pure K+Ca2Nb3O10- and g-C3N4, respectively. This enhanced activity can be mainly attributed to the synergistic effect of g-C3N4/K+Ca2Nb3O10-nanosheet heterojunctions with strong interfacial interaction and abundant 2D coupling interfaces, which could efficiently promote the photo-induced charge separation. The results of work demonstrated that construction of 2D-2D heterojunctions is an effective strategy to obtain the enhanced photocatalytic activity towards the degradation of tetracycline hydrochloride. (C) 2016 Published by Elsevier B.V.
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