title: Reduced graphene oxide for catalytic oxidation of aqueous organic pollutants.
abstract: We discovered that chemically reduced graphene oxide, with an I(D)/I(G) >1.4 (defective to graphite) can effectively activate peroxymonosulfate (PMS) to produce active sulfate radicals. The produced sulfate radicals (SO(4)(•-)) 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 (Co(3)O(4)) in degradation of phenol, 2,4-dichlorophenol (DCP) and a dye (methylene blue, MB) in water, therefore providing a novel strategy for environmental remediation.
authors.affiliation: Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, WA 6845, Australia. h.sun@curtin.edu.au
authors.forename: Hongqi
authors.initials: H
authors.lastname: Sun
authors.forename: Shizhen
authors.initials: S
authors.lastname: Liu
authors.forename: Guanliang
authors.initials: G
authors.lastname: Zhou
authors.forename: Ha Ming
authors.initials: HM
authors.lastname: Ang
authors.forename: Moses O
authors.initials: MO
authors.lastname: Tadé
authors.forename: Shaobin
authors.initials: S
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry; D052918:Environmental Restoration and Remediation; D005609:Free Radicals / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D019800:Phenol / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002733:Chlorophenols; D005609:Free Radicals; D037742:Nanotubes, Carbon; D010087:Oxides; D014874:Water Pollutants, Chemical; D019800:Phenol; D006108:Graphite; C004762:2,4-dichlorophenol; D008751:Methylene Blue