Activation of persulfates by catalytic nickel nanoparticles supported on N-doped carbon nanofibers for degradation of organic pollutants in water

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dc.contributor.authorYao, Y.
dc.contributor.authorZhang, J.
dc.contributor.authorGao, M.
dc.contributor.authorYu, M.
dc.contributor.authorHu, Y.
dc.contributor.authorCheng, Z.
dc.contributor.authorWang, S.
dc.date.issued2018
dc.descriptionAvailable online 24 May 2018
dc.description.abstractAn N-doped carbon nanofiber cloth (CC) with anchored nickel nanoparticles (Ni@N-CC) was synthesized from a facile pyrolysis process and employed as a catalyst to oxidize target contaminants using peroxydisulfate (PDS) as both radical precursors and electron acceptors. An effective strategy was developed to control the porous structures and catalytic performances by optimizing the precursor weights and pyrolysis temperatures for Ni@N-CC preparation. The optimal temperature was 700 °C, and the best dicyanodiamine mass was 1.0 g. Ni@N-CC was found to be superior for PDS activation to CC and nickel nanoparticles (NPs), ascribing to highly active sites, intimate connection between the nickel NPs and highly conductive N-doped CC, as well as the formed three-dimensional architecture. The oxidation rates were influenced by the oxidant loading (0.185-1.11 mM), initial organics concentration (10-50 mg/L), temperature (5-45 °C), pH (2.65-10.47), and inorganic anions. Furthermore, mechanistic investigations using various probe reagents and spin trapping technique identified the generation of several active species for oxidation. The reaction was found to proceed via the electron transfer mediation from organics to PDS on N-doped CC and one electron reduction of PDS on Ni<sup>0</sup> NPs. This study highlights the design of highly active and reusable heterogeneous carbon/metal hybrids for more efficient PDS activation in environmental remediation.
dc.description.statementofresponsibilityYunjin Yao, Jie Zhang, Mengxue Gao, Maojing Yu, Yi Hu, Zhuoran Cheng, Shaobin Wang
dc.identifier.citationJournal of Colloid and Interface Science, 2018; 529:100-110
dc.identifier.doi10.1016/j.jcis.2018.05.077
dc.identifier.issn0021-9797
dc.identifier.issn1095-7103
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.urihttp://hdl.handle.net/2440/115855
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/DP150103026
dc.rights© 2018 Elsevier Inc. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.jcis.2018.05.077
dc.subjectCarbon cloth; peroxydisulfate; nickel; organic pollutant; synergistic effect
dc.titleActivation of persulfates by catalytic nickel nanoparticles supported on N-doped carbon nanofibers for degradation of organic pollutants in water
dc.typeJournal article
pubs.publication-statusPublished

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