期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 521, 期 -, 页码 42-49出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.03.033
关键词
Bi2MoO6; NiTiO3; Fiber; Visible light; Antibiotic removal
资金
- National Natural Science Foundation of China [51708504, 31501573]
- Public Projects of Zhejiang Province [2017C32079, LGN18E080003]
- Science and Technology project of Zhoushan [2017C41006, 2016C41012, 2015C21014, 2015C21013]
- Research Startup Foundation of Zhejiang Ocean University [12215090117]
A huge challenge in the field of pollutant removal is the scarcity of visible-light-driven (VLD) photocatalysts that are efficient, stable, easily recyclable and capable of mineralizing organic pollutants. In this regard, a novel hierarchical architecture of Bi2MoO6 nanosheets onto NiTiO3 nanofibers for tetracycline hydrochloride (TC) removal was rationally designed and fabricated via a facile approach. In this hetero-junction system, highly homogeneous-distributed Bi2MoO6 nanosheets were anchored on electrospun NiTiO3 nanofibers, endowing the heterojunction with compact interfacial contact. By virtue of the favorable interfacial contact and matched band alignment, promoted suppression of photo-generated electron-hole recombination is achieved in Bi2MoO6/NiTiO3 system, as confirmed by photoluminescence measurement. As a result, the heterojunction with Bi2MoO6/NiTiO3 molar ratio of 1:1 exhibits an outstanding VLD photocatalytic activity and good stability for tetracycline hydrochloride (TC) degradation. The photodegradation rate constant (k) is 26.0, 5.4 or 3.7 folds higher than that of pristine NiTiO3, Bi2MoO6, or the mechanical mixture (20.2 wt% NiTiO3 + 79.8 wt% Bi2MoO6). The holes and superoxide radicals are detected as the dominant active species responsible for TC removal. Moreover, this work reports an efficient VLD photocatalyst for TC removal and will open up new insights into the design of novel fiber-shaped VLD heterojunction photocatalyts for environment remediation. (C) 2018 Elsevier Inc. All rights reserved.
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