Synthesis of "sea urchin"-like carbon nanotubes/porous carbon superstructures derived from waste biomass for treatment of various contaminants

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dc.contributor.authorYao, Y.
dc.contributor.authorLian, C.
dc.contributor.authorWu, G.
dc.contributor.authorHu, Y.
dc.contributor.authorWei, F.
dc.contributor.authorYu, M.
dc.contributor.authorWang, S.
dc.date.issued2017
dc.descriptionAvailable online 25 July 2017
dc.description.abstractNovel “sea urchin”-like Ni nanoparticles embedded in N-doped carbon nanotubes (CNTs) supported on porous carbon (Ni@N-C) 3D materials derived from waste biomass were prepared via pyrolysis and employed as an environmentally friendly, easy available and cost-effective catalyst for removal of toxic pollutants. The characterizations indicated that Ni<sup>0</sup> catalyzed the growth of intertwined CNTs on carbon layers, affording abundant porous structures and larger specific surface area. With the synergistic effect of embedded Ni<sup>0</sup> nanoparticles, nitrogen doping, hierarchical micro-mesopores, and interconnected CNTs, Ni@N-C displayed a superior catalytic capability for the oxidation of organic pollutants using peroxymonosulfate as an oxidant, and catalytic reduction of toxic Cr<sup>VI</sup> to nontoxic Cr<sup>III</sup> by formic acid as a reducing agent. It was found that pyrolysis temperatures affected the compositions, morphologies, and catalytic properties of Ni@N-C. Inactive oxidized N species have transformed to the highly active graphitic N, pyridinic-N, and Ni-O-N clusters, thereby improving the catalytic activity. Moreover, Ni@N-C maintained good physicochemical structure and stable activity even after several cycles of reactions. The simple synthetic strategies, 3D structure, and remarkable performance of Ni@N-C composites make them serve as alternative environmentally friendly catalysts for removal of pollutants.
dc.description.statementofresponsibilityYunjin Yao, Chao Lian, Guodong Wu, Yi Hu, Fengyu Wei, Maojing Yu, Shaobin Wang
dc.identifier.citationApplied Catalysis B: Environmental, 2017; 219:563-571
dc.identifier.doi10.1016/j.apcatb.2017.07.064
dc.identifier.issn0926-3373
dc.identifier.issn1873-3883
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.urihttp://hdl.handle.net/2440/115845
dc.language.isoen
dc.publisherElsevier BV
dc.relation.granthttp://purl.org/au-research/grants/arc/DP150103026
dc.rights© 2017 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.apcatb.2017.07.064
dc.subjectCarbon nanotubes; biomass; hexavalent chromium; organic pollutants; heterogeneous catalysis
dc.titleSynthesis of "sea urchin"-like carbon nanotubes/porous carbon superstructures derived from waste biomass for treatment of various contaminants
dc.typeJournal article
pubs.publication-statusPublished

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