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Type: Journal article
Title: Low temperature combustion synthesis of nitrogen-doped graphene for metal-free catalytic oxidation
Author: Indrawirawan, S.
Sun, H.
Duan, X.
Wang, S.
Citation: Journal of Materials Chemistry A, 2015; 3(7):3432-3440
Publisher: Royal Society of Chemistry
Issue Date: 2015
ISSN: 2050-7488
Statement of
Stacey Indrawirawan, Hongqi Sun, Xiaoguang Duan and Shaobin Wang
Abstract: Nitrogen-doped reduced graphene oxide (N-rGO) was prepared by a simple process of simultaneous reduction and nitrogen doping on graphene oxide (GO) at low temperatures using ammonium nitrate as a N precursor. Characterization techniques indicated that N-rGO materials with a high N loading (5–8 at%) can be easily produced and that the crystal/micro-structures and chemical compositions of N-rGO materials are dependent on the calcination conditions. The metal-free catalysis of N-rGO was investigated by catalytic activation of peroxymonosulfate (PMS) for phenol oxidative degradation in water. It was found that N-rGO samples are promising green catalysts for phenol degradation. Kinetic studies showed that phenol degradation follows first order reaction kinetics on N-rGO-350 with an activation energy of 31.6 kJ mo⁻¹. The mechanism of PMS activation and phenol oxidation was elucidated by employing both electron paramagnetic resonance (EPR) studies and quenching tests with ethanol and tert-butanol.
Rights: This journal is © The Royal Society of Chemistry 2015
RMID: 0030095329
DOI: 10.1039/c4ta05940a
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Appears in Collections:Chemical Engineering publications

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