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Conference Paper: Zinc oxide tetrapods as efficient photocatalysts for organic pollutant degradation

TitleZinc oxide tetrapods as efficient photocatalysts for organic pollutant degradation
Authors
KeywordsPhotodegradation
Tetrapods
Zinc oxide
Issue Date2015
PublisherSPIE - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml?WT.svl=mddp2
Citation
Oxide-Based Materials and Devices VI; San Francisco, CA., 8-11 February 2015. In SPIE - International Society for Optical Engineering Proceedings, 2015, v. 9364, p. 93641W-1 - 93641W-6 How to Cite?
AbstractBisphenol A (BPA) and other organic pollutants from industrial wastewater have drawn increasing concern in the past decades regarding their environmental and biological risks, and hence developing strategies of effective degradation of BPA and other organic pollutants is imperative. Metal oxide nanostructures, in particular titanium oxide (TiO2) and zinc oxide (ZnO), have been demonstrated to exhibit efficient photodegradation of various common organic dyes. ZnO tetrapods are of special interest due to their low density of native defects which consequently lead to lower recombination losses and higher photocatalytic efficiency. Tetrapods can be obtained by relatively simple and low-cost vapor phase deposition in large quantity; the micron-scale size would also be advantageous for catalyst recovery. In this study, the photodegradation of BPA with ZnO tetrapods and TiO2 nanostructures under UV illumination were compared. The concentration of BPA dissolved in DI water was analyzed by high-performance liquid chromatography (HPLC) at specified time intervals. It was observed that the photocatalytic efficiency of ZnO tetrapods eventually surpassed Degussa P25 in free-standing form, and more than 80% of BPA was degraded after 60 min. Photodegradation of other organic dye pollutants by tetrapods and P25 were also examined. The superior photocatalytic efficiency of ZnO tetrapods for degradation of BPA and other organic dye pollutants and its correlation with the material properties were discussed. © 2015 SPIE.
Persistent Identifierhttp://hdl.handle.net/10722/220449
ISBN
ISSN

 

DC FieldValueLanguage
dc.contributor.authorLiu, F-
dc.contributor.authorLeung, YH-
dc.contributor.authorDjurisic, AB-
dc.contributor.authorLiao, C-
dc.contributor.authorShih, K-
dc.date.accessioned2015-10-16T06:42:53Z-
dc.date.available2015-10-16T06:42:53Z-
dc.date.issued2015-
dc.identifier.citationOxide-Based Materials and Devices VI; San Francisco, CA., 8-11 February 2015. In SPIE - International Society for Optical Engineering Proceedings, 2015, v. 9364, p. 93641W-1 - 93641W-6-
dc.identifier.isbn978-162841454-7-
dc.identifier.issn0277-786X-
dc.identifier.urihttp://hdl.handle.net/10722/220449-
dc.description.abstractBisphenol A (BPA) and other organic pollutants from industrial wastewater have drawn increasing concern in the past decades regarding their environmental and biological risks, and hence developing strategies of effective degradation of BPA and other organic pollutants is imperative. Metal oxide nanostructures, in particular titanium oxide (TiO2) and zinc oxide (ZnO), have been demonstrated to exhibit efficient photodegradation of various common organic dyes. ZnO tetrapods are of special interest due to their low density of native defects which consequently lead to lower recombination losses and higher photocatalytic efficiency. Tetrapods can be obtained by relatively simple and low-cost vapor phase deposition in large quantity; the micron-scale size would also be advantageous for catalyst recovery. In this study, the photodegradation of BPA with ZnO tetrapods and TiO2 nanostructures under UV illumination were compared. The concentration of BPA dissolved in DI water was analyzed by high-performance liquid chromatography (HPLC) at specified time intervals. It was observed that the photocatalytic efficiency of ZnO tetrapods eventually surpassed Degussa P25 in free-standing form, and more than 80% of BPA was degraded after 60 min. Photodegradation of other organic dye pollutants by tetrapods and P25 were also examined. The superior photocatalytic efficiency of ZnO tetrapods for degradation of BPA and other organic dye pollutants and its correlation with the material properties were discussed. © 2015 SPIE.-
dc.languageeng-
dc.publisherSPIE - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml?WT.svl=mddp2-
dc.relation.ispartofSPIE - International Society for Optical Engineering Proceedings-
dc.rightsSPIE - International Society for Optical Engineering Proceedings. Copyright © SPIE - International Society for Optical Engineering.-
dc.rightsCopyright notice format: Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhotodegradation-
dc.subjectTetrapods-
dc.subjectZinc oxide-
dc.titleZinc oxide tetrapods as efficient photocatalysts for organic pollutant degradation-
dc.typeConference_Paper-
dc.identifier.emailDjurisic, AB: dalek@hku.hk-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityLeung, YH=rp01770-
dc.identifier.authorityDjurisic, AB=rp00690-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1117/12.2078588-
dc.identifier.scopuseid_2-s2.0-84931840837-
dc.identifier.hkuros255121-
dc.identifier.volume9364-
dc.identifier.spage93641W-1-
dc.identifier.epage93641W-6-
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 151123-

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