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Reduced Graphene Oxide for Catalytic Oxidation of Aqueous Organic Pollutants

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Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, WA 6845, Australia
*E-mail: [email protected] (S.W.); [email protected] (H.S.).
Cite this: ACS Appl. Mater. Interfaces 2012, 4, 10, 5466–5471
Publication Date (Web):September 11, 2012
https://doi.org/10.1021/am301372d
Copyright © 2012 American Chemical Society
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Abstract

We discovered that chemically reduced graphene oxide, with an ID/IG >1.4 (defective to graphite) can effectively activate peroxymonosulfate (PMS) to produce active sulfate radicals. The produced sulfate radicals (SO4•—) are powerful oxidizing species with a high oxidative potential (2.5–3.1 vs 2.7 V of hydroxyl radicals), and can effectively decompose various aqueous contaminants. Graphene demonstrated a higher activity than several carbon allotropes, such as activated carbon (AC), graphite powder (GP), graphene oxide (GO), and multiwall carbon nanotube (MWCNT). Kinetic study of graphene catalyzed activation of PMS was carried out. It was shown that graphene catalysis is superior to that on transition metal oxide (Co3O4) in degradation of phenol, 2,4-dichlorophenol (DCP) and a dye (methylene blue, MB) in water, therefore providing a novel strategy for environmental remediation.

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Additional XRD patterns, FTIR spectra, UV–vis absorption spectra, stability tests, characterization of catalysts before and after use (XRD, SEM, and Raman), HPLC spectra, and GC-MS spectra. This material is available free of charge via the Internet at http://pubs.acs.org.

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