Nitrogen-doped carbon encapsulating molybdenum carbide and nickel nanostructures loaded with PVDF membrane for hexavalent chromium reduction

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dc.contributor.authorYao, Y.
dc.contributor.authorHu, Y.
dc.contributor.authorYu, M.
dc.contributor.authorLian, C.
dc.contributor.authorGao, M.
dc.contributor.authorZhang, J.
dc.contributor.authorLi, G.
dc.contributor.authorWang, S.
dc.date.issued2018
dc.description.abstractMolybdenum carbide and Ni⁰ nanoparticles (NPs) embedding into N-doped carbon materials (MoₓNiy@N-C) were prepared by one-step thermolysis of Ni, Mo, N, C precursors, and then loaded on poly (vinylidene fluoride) (PVDF) film to obtain the catalytic membranes (MoₓNiy@N-C/PVDF). The membranes effectively catalyzed the reduction of toxic CrVI to benign CrIII by employing formic acid (FA) as the reducing agent. The effects of parameters, such as initial concentrations of CrVI (5–25 mg/L) and FA (0.117–0.702 M), solution pHs (2.12–5.43) and temperatures (15–55 °C), as well as HCOONa concentrations (0–0.20 M) on CrVI reduction were analyzed in view of scalable industrial applications. Owing to the synergistic effects amongst Ni0, MoxC, doped nitrogen, and oxygen groups as catalytic active sites, and carbon shell protection of metal NPs from leaching out, MoxNiy@N-C/PVDF catalysts exhibited excellent catalytic activity and recyclable capability for CrVI reduction. The membrane’s unique porous structure and large chemically active surface area not only minimize the NPs agglomeration, but also allow the facile transport of catalytic reactants to the active surface without suffering from high mass-transfer resistance. This study demonstrates MoxNiy@N-C/PVDF catalytic membranes with the morphological and structural features provide a green, economic, and fast method for the treatment of CrVI containing waters.
dc.description.statementofresponsibilityYunjin Yao, Yi Hu, Maojing Yu, Chao Lian, Mengxue Gao, Jie Zhang, Guanwei Li, Shaobin Wang
dc.identifier.citationChemical Engineering Journal, 2018; 344:535-544
dc.identifier.doi10.1016/j.cej.2018.03.089
dc.identifier.issn1385-8947
dc.identifier.issn1873-3212
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.urihttp://hdl.handle.net/2440/117736
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/DP150103026
dc.rights© 2018 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.cej.2018.03.089
dc.subjectPVDF membrane; hexavalent chromium; molybdenum carbide; reduction reaction
dc.titleNitrogen-doped carbon encapsulating molybdenum carbide and nickel nanostructures loaded with PVDF membrane for hexavalent chromium reduction
dc.typeJournal article
pubs.publication-statusPublished

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