Sulfur and nitrogen co-doped graphene for metal-free catalytic oxidation reactions
MetadataShow full item record
Funding and Sponsorship
This is the peer reviewed version of the following article: Duan, X. and O'Donnell, K. and Sun, H. and Wang, Y. and Wang, S. 2015. Sulfur and nitrogen co-doped graphene for metal-free catalytic oxidation reactions. Small. 11 (25): pp. 3036-3044, which has been published in final form at 10.1002/smll.201403715. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving at http://olabout.wiley.com/WileyCDA/Section/id-828039.html
Sulfur and nitrogen co-doped reduced graphene oxide (rGO) is synthesized bya facile method and demonstrated remarkably enhanced activities in metal-free activation of peroxymonosulfate (PMS) for catalytic oxidation of phenol. Based on first-order kinetic model, S–N co-doped rGO (SNG) presents an apparent reaction rate constant of 0.043 ± 0.002 min -1 , which is 86.6, 22.8, 19.7, and 4.5-fold as high as that over graphene oxide (GO), rGO, S-doped rGO (S-rGO), and N-doped rGO(N-rGO), respectively. A variety of characterization techniques and density functional theory calculations are employed to investigate the synergistic effect of sulfur and nitrogen co-doping. Co-doping of rGO at an optimal sulfur loading can effectively break the inertness of carbon systems, activate the sp 2 -hybridized carbon lattice and facilitate the electron transfer from covalent graphene sheets for PMS activation. Moreover, both electron paramagnetic resonance (EPR) spectroscopy and classical quenching tests are employed to investigate the generation and evolution of reactive radicals on the SNG sample for phenol catalytic oxidation. This study presents anovel metal-free catalyst for green remediation of organic pollutants in water.
Showing items related by title, author, creator and subject.
Duan, Xiaoguang; Sun, Hongqi; Wang, Shaobin (2018)Conspectus Catalytic processes have remarkably boosted the rapid industrializations in chemical production, energy conversion, and environmental remediation. As one of the emerging applications of carbocatalysis, metal-free ...
Nitrogen- and Sulfur-Codoped Hierarchically Porous Carbon for Adsorptive and Oxidative Removal of Pharmaceutical ContaminantsTian, W.; Zhang, H.; Duan, X.; Sun, H.; Tade, Moses; Ang, H.; Wang, Shaobin (2016)Heteroatom (nitrogen and sulfur)-codoped porous carbons (N-S-PCs) with high surface areas and hierarchically porous structures were successfully synthesized via direct pyrolysis of a mixture of glucose, sodium bicarbonate, ...
Synthesis of nitrogen and sulfur co-doped reduced graphene oxide as efficient metal-free cocatalyst for the photo-activity enhancement of CdSHan, W.; Chen, L.; Song, W.; Wang, Shaobin; Fan, X.; Li, Y.; Zhang, F.; Zhang, G.; Peng, W. (2018)© 2018 Elsevier B.V. Nitrogen and sulfur co-doped reduced graphene oxide (NS-rGO) was synthesized using a facile low temperature calcination method, which was then used as support and cocatalyst for the anchor of CdS. The ...