Visible light photocatalytic reduction of Cr(VI) by surface modified CNT/titanium dioxide composites nanofibers

dc.citation.epage53en_US
dc.citation.spage45en_US
dc.citation.volumeNumber424en_US
dc.contributor.authorMohamed, A.en_US
dc.contributor.authorOsman, T. A.en_US
dc.contributor.authorToprak, M. S.en_US
dc.contributor.authorMuhammed, M.en_US
dc.contributor.authorYilmaz, E.en_US
dc.contributor.authorUheida, A.en_US
dc.date.accessioned2018-04-12T10:54:04Z
dc.date.available2018-04-12T10:54:04Z
dc.date.issued2016en_US
dc.departmentNational Magnetic Resonance Research Center (UMRAM)en_US
dc.description.abstractIn this work we report a highly efficient photocatalytic reduction of Cr(VI) based on PAN-CNT/TiO2-NH2 composite nanofibers fabricated by using electrospinning technique followed by chemical crosslinking of surface modified TiO2 NPs functionalized with amino group. The structure and morphology of the fabricated composite nanofibers were characterized by FTIR, SEM, TEM, TGA, and XPS. The results indicate that the composite nanofibers possess excellent photoreduction performance for Cr(VI) under visible light (125 W) after 30 min, which is much faster than previous reports. The effects of various experimental parameters such as catalyst dose, irradiation time, initial concentration of Cr(VI), and pH on the photoreduction efficiency of Cr(VI) were investigated. The highest photoreduction efficiency of Cr (VI) was obtained at low acidity and low amount of TiO2/CNT photocatalyst. The kinetic experimental data was attained and fitted well with a pseudo-first-order model. The UV–vis spectrophotometer and XPS analyses proved that chromate Cr(VI) was reduced to Cr(III). In addition, it can be concluded that the addition of the phenol enhances the photocatalytic reduction of Cr(VI). Furthermore, the photoreduction mechanism has also been discussed. Finally, the fabricated composite nanofibers were found to be stable after at least five regeneration cycles. © 2016en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T10:54:04Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2016en
dc.identifier.doi10.1016/j.molcata.2016.08.010en_US
dc.identifier.issn1381-1169
dc.identifier.urihttp://hdl.handle.net/11693/36807
dc.language.isoEnglishen_US
dc.publisherElsevier B.V.en_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.molcata.2016.08.010en_US
dc.source.titleJournal of Molecular Catalysis A: Chemicalen_US
dc.subjectChromium (VI)en_US
dc.subjectComposite nanofibersen_US
dc.subjectPhotocatalytic reductionen_US
dc.subjectVisible lighten_US
dc.titleVisible light photocatalytic reduction of Cr(VI) by surface modified CNT/titanium dioxide composites nanofibersen_US
dc.typeArticleen_US

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