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|Title:||Low temperature combustion synthesis of nitrogen-doped graphene for metal-free catalytic oxidation|
|Citation:||Journal of Materials Chemistry A, 2015; 3(7):3432-3440|
|Publisher:||Royal Society of Chemistry|
|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|
|Appears in Collections:||Chemical Engineering publications|
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