Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 402, Issue -, Pages 230-236Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2013.03.070
Keywords
Cobalt hydroxide; Graphene; Phenol; Catalytic oxidation; Water treatment
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Funding
- Fundamental Research Funds for the Central Universities [2012HGQC0010]
- Anhui Provincial Natural Science Foundation [1308085MB21]
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A cobalt hydroxide (Co(OH)(2)) nanoflake-reduced graphene oxide (rGO) hybrid was synthesized by a onepot hydrothermal method using glucose as a reducing agent for graphene oxide (GO) reduction. The structural and surface properties of the material were investigated by scanning and transmission electron microscopies, energy-dispersive X-ray spectrometry, powder X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Catalytic activities of GO, rGO, Co(OH)(2) and Co(OH)(2)-rGO in aqueous phenol degradation using peroxymonosulfate as an oxidant were compared. A synergetic effect on the catalytic activity was found on the Co(OH)(2)-rGO hybrid. Although rGO has weak catalytic activity, Co(OH)2-rGO hybrid showed a higher catalytic activity than Co(OH)2. The phenol degradation on Co(OH)(2)-rGO was extremely fast and took around 10 min for 100% phenol removal. The degradation was found to follow the first order kinetics and a mechanism for phenol degradation was presented. (C) 2013 Elsevier Inc. All rights reserved.
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