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https://hdl.handle.net/2440/113744
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Type: | Journal article |
Title: | N-doped graphene from metal-organic frameworks for catalytic oxidation of p-hydroxylbenzoic acid: N-functionality and mechanism |
Author: | Liang, P. Zhang, C. Duan, X. Sun, H. Liu, S. Tade, M.O. Wang, S. |
Citation: | ACS Sustainable Chemistry and Engineering, 2017; 5(3):2693-2701 |
Publisher: | American Chemical Society |
Issue Date: | 2017 |
ISSN: | 2168-0485 2168-0485 |
Statement of Responsibility: | Ping Liang, Chi Zhang, Xiaoguang Duan, Hongqi Sun, Shaomin Liu, Moses O. Tade, and Shaobin Wang |
Abstract: | N-doped graphene has been considered as a promising catalyst with surface metal-free active sites for environmental remediation. Several MIL-100 (Fe)-templated N-doped graphene samples were synthesized using dicyandiamide, melamine, and urea as the nitrogen precursors. Excellent catalytic oxidation of p-hydroxylbenzoic acid (PHBA) was observed on the as-synthesized samples via peroxymonosulfate (PMS) activation. The mechanism was investigated by both electron paramagnetic resonance (EPR, 5,5- dimethyl-1-pyrroline N-oxide and 2,2,6,6-tetramethyl-4-piperidinol as the trapping agents) and quenching tests (ethanol and sodium azide as the radical scavengers). Benzoic acid and furfuryl alcohol were also employed as probing reagents for hydroxyl/sulfate radicals and singlet oxygen, respectively. The results confirmed that singlet oxygen was generated and dominated the PHBA degradation on N-doped graphene, rather than hydroxyl/sulfate radicals. With the novel N-doped graphene, this study illustrates the formation mechanism of nitrogen functionalities for reactive radicals via PMS activation for removal of organic contaminants in water. |
Keywords: | MIL-100 (Fe); N-doped graphene; environmental catalysis; singlet oxygen; peroxymonosulfate activation |
Description: | Published: February 13, 2017 |
Rights: | © 2017 American Chemical Society |
DOI: | 10.1021/acssuschemeng.6b03035 |
Grant ID: | http://purl.org/au-research/grants/arc/DP130101319 http://purl.org/au-research/grants/arc/DP150103026 http://purl.org/au-research/grants/arc/LE120100026 |
Published version: | http://dx.doi.org/10.1021/acssuschemeng.6b03035 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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