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Synthesis of Vertically-Aligned Zinc Oxide Nanowires and Their Application as a Photocatalyst

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dc.contributor.authorZhou, Qiong
dc.contributor.authorWen, John Z.
dc.contributor.authorZhao, Pei
dc.contributor.authorAnderson, William A.
dc.date.accessioned2022-06-09T20:00:16Z
dc.date.available2022-06-09T20:00:16Z
dc.date.issued2017-01-11
dc.description.abstractVertically aligned zinc oxide (ZnO) nanowires were hydrothermally synthesized on a glass substrate with the assistance of a pre-coated ZnO seeding layer. The crystalline structure, morphology and transmission spectrum of the as-synthesized sample were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and ultraviolet-visible (UV-Vis) spectrophotometry, respectively, indicating a wurzite ZnO material of approximately 100 nm wire diameter and absorbance at 425 nm and lower wavelengths. The photocatalytic activity of the sample was tested via the degradation of methyl orange in aqueous solution under UV-A irradiation. The synthesized nanowires showed a high photocatalytic activity, which increased up to 90% degradation in 2 h as pH was increased to 12. It was shown that the photocatalytic activity of the nanowires was proportional to the length to diameter ratio of the nanowires, which was in turn controlled by the growth time and grain size of the seed layer. Estimates suggest that diffusion into the regions between nanowires may be significantly hindered. Finally, the reusability of the prepared ZnO nanowire samples was also investigated, with results showing that the nanowires still showed 97% of its original photoactivity after ten cycles of use.en
dc.description.sponsorshipLaboratory for Emerging Energy Research group||Air Pollution Control Lab|| Natural Sciences and Engineering Research Council of Canadaen
dc.identifier.urihttps://doi.org/10.3390/nano7010009
dc.identifier.urihttp://hdl.handle.net/10012/18372
dc.language.isoenen
dc.publisherMultidisciplinary Digital Publishing Instituteen
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectzinc oxideen
dc.subjectnanowiresen
dc.subjectphotocatalysisen
dc.subjectmethyl orangeen
dc.subjecthydrothermal synthesisen
dc.titleSynthesis of Vertically-Aligned Zinc Oxide Nanowires and Their Application as a Photocatalysten
dc.typeArticleen
dcterms.bibliographicCitationZhou, Q., Wen, J. Z., Zhao, P., & Anderson, W. A. (2017). Synthesis of Vertically-Aligned Zinc Oxide Nanowires and Their Application as a Photocatalyst. Nanomaterials, 7(1), 9. https://doi.org/10.3390/nano7010009en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Chemical Engineeringen
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.typeOfResourceTexten

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