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Chemcial Industry and Engineering 2022, Vol. 39 Issue (6) :1-13    DOI: 10.13353/j.issn.1004.9533.20220331
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Activation of peroxymonosulfate for bisphenol A degradation by nitrogen-doped hollow porous carbon materials
WANG Qing, ZHANG Fengbao, FAN Xiaobin, LI Yang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

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Abstract A rational design of economical, high-efficient and stable catalysts plays an important role in the degradation of water contaminants during advanced oxidations (AOPs). The N-doped hollow porous carbon materials (NHPC) are synthesized using an in-situ polymerization strategy, and then employed as peroxymonosulfate (PMS) activator for bisphenol A (BPA) degradation. Combined with kinetic analysis and various characterization methods, the effects of structural defects, sp2-hybridized carbon, oxygen functional groups and three typical N-bonding configurations (pyridinic N, pyrrolic N and graphitic N) on the catalytic oxidation ability are investigated. A positive linear correlation between reaction rate constants and the content of graphitic N in NHPC reveals that the graphitic N are the main active sites for PMS activation. Meanwhile, the activity of catalyst can be recovered through heat treatment by regenerating graphite N, and the recovered catalyst exhibits more excellent activation performance than fresh catalyst. Furthermore, the free radical quenching experiments and electrochemical experiments demonstrate that the NHPC-800/PMS system decompose the BPA via O2·--mediated radical processes. This study deepens the understanding of the N-doped carbon catalysts for PMS activation mechanism, providing guidance for the practical application of them in environmental remediation.
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WANG Qing
ZHANG Fengbao
FAN Xiaobin
LI Yang
KeywordsN-doped hollow porous carbon materials   peroxymonosulfate   graphitic N   superoxide radical (O2·   -)     
Received 2022-04-30;
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WANG Qing, ZHANG Fengbao, FAN Xiaobin, LI Yang.Activation of peroxymonosulfate for bisphenol A degradation by nitrogen-doped hollow porous carbon materials[J]  Chemcial Industry and Engineering, 2022,V39(6): 1-13
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