Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 610, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2020.125481
Keywords
Bi2WO6; CuS; g-C3N4; Ternary heterojunction; Photodegradation; Ciprofloxacin
Categories
Funding
- Outstanding Young Talents Fund Project of Department of Science and Technology of Jilin Province [20190103109JH]
- National Key Research and Development Program [2017YFD0300405-4]
- National Special Key Research and Development Plan [2018YFD0501800, 2016YFD0501400]
- Science and Technology Development Project of Jilin Province [20190201296JC]
- National Special Project for the Construction of Modern Agricultural Industrial Technology System [CARS-37]
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The study synthesized efficient Bi2WO6/CuS/g-C3N4 ternary heterojunctions for visible-light photocatalytic performance and successfully applied it in degrading CIP. It demonstrated effective generation of active species and catalytic degradation in the process, with good chemical stability.
In this study, the novel Bi2WO6/CuS/g-C3N4 ternary heterojunctions with highly efficient visible-light photocatalytic performance were synthesized, which were then applying in the degradation of ciprofloxacin (CIP) in wastewater. The characterization data demonstrated that the heterojunction interfaces were formed between Bi2WO6, CuS and g-C3N4, which effectively narrowed the band gap. Moreover, coupling CuS with g-C3N4 inhibited the recombination of photogenerated e(-) and h(+) pairs and accelerated the interfacial charge transfer; as a result, Bi2WO6/CuS/g-C3N4 possessed enhanced visible-light photocatalytic performance. Importantly, it has been confirmed that the photogenerated e(-), h(+) and O-2(-center dot) 'were main active species generated by Bi2WO6/CuS/g-C3N4 for photodegradation, which realized simultaneous redox reactions for the effective degradation of CIP (74.94 %, 75 min) and RhB (99.66 %, 90 min). Besides, the great chemical stability enabled Bi2WO6/CuS/g-C3N4 to maintain nearly the same photodegradation efficiency for CIP degradation after four repeated cycles. Taken together, this study provided not only a feasible method for synthesizing the novel Bi2WO6/CuS/g-C3N4 ternary heterojunctions with highly efficient visible-light photocatalytic performance, but also a way for purifying CIP in wastewater.
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