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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 14/2020

31-05-2020

Enhanced photoactivity of cerium tungstate-modified graphitic carbon nitride heterojunction photocatalyst for the photodegradation of moxifloxacin

Authors: S. Lakshmi Prabavathi, K. Saravanakumar, T. T. I. Nkambule, V. Muthuraj, G. Mamba

Published in: Journal of Materials Science: Materials in Electronics | Issue 14/2020

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Abstract

Design and optimization of visible-light-driven photocatalysts for degradation of organic pollutants is an important step towards environmental decontamination. In this study, wolframite cerium tungstate (Ce2(WO4)3, (CW)) hybridized with g-C3N4 (CN) nanosheets was synthesized via a simple hydrothermal route followed by an ultrasound-assisted synthesis method. The prepared Ce2(WO4)3@ g-C3N4 (CW@CN) heterojunction was investigated for photocatalytic degradation of the antibiotic moxifloxacin (MXF) under visible light irradiation. Structural, morphological, and optical properties as well as chemical composition of the as-synthesized heterojunction were investigated by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS) and photoluminescence (PL). MXF photocatalytic degradation by the binary nanostructure (Ce2(WO4)3@ g-C3N4) (94.1%) was the highest compared to g-C3N4 (53.6%) and Ce2(WO4)3 (46.4%). Such enhanced activity could be ascribed to efficient suppression of the charge carriers’ recombination, leading to adequate formation of the reactive species responsible for MXF degradation. Furthermore, the Ce2(WO4)3@ g-C3N4 heterojunction showed remarkable stability over five consecutive cycles, with only 11.5% reduction after the 5th cycle. This work established the potential applicability of Ce2(WO4)3@ g-C3N4 nanostructures towards photocatalytic removal of MXF.
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Metadata
Title
Enhanced photoactivity of cerium tungstate-modified graphitic carbon nitride heterojunction photocatalyst for the photodegradation of moxifloxacin
Authors
S. Lakshmi Prabavathi
K. Saravanakumar
T. T. I. Nkambule
V. Muthuraj
G. Mamba
Publication date
31-05-2020
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 14/2020
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-020-03692-1

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