Journal
CHEMOSPHERE
Volume 154, Issue -, Pages 118-123Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2016.03.107
Keywords
Emerging contaminants; Cu2O/rGO; Photocatalysis; Visible light; Sulfamethoxazole
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Funding
- Ministry of Science and Technology of Taiwan [MOST 104-2628-E-006-018-MY3]
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The cuprous oxide-reduced graphene oxide (Cu2O/rGO-x) composites were prepared via a simple wet chemical method by using CuSO4 center dot 5H(2)O and graphene oxide as precursors and ascorbic acid as a reducing agent, respectively. These Cu2O/rGO-x were employed as photocatalysts for degrading emerging contaminants and organic dye pollutants (i.e., sulfamethoxazole (SMX) and methylene blue (MB)) under visible light. A variety of different spectroscopic and analytical techniques, such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman scattering spectroscopy and UV-Visible spectroscopy were used to characterize the physical properties of photo catalysts. In the photodegrading experiments, it can be found that the Cu2O/rGO-80 photocatalyst has the superior visible-light response of ca. 50% removal efficiency of SMX within 120 min and 100% removal efficiency of MB within 40 min. These observations may be attributed the well-dispersed and visible light-responsive Cu2O nanoparticles are supported on the surface of rGO sheets that can enhance absorption of visible light during photocatalysis. (C) 2016 Elsevier Ltd. All rights reserved.
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