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Photocatalytic properties and polarized Raman of different ZnO crystal planes
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0002-9812-7370
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0003-0296-5247
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0003-2759-7356
2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Zinc oxide (ZnO) is a well-studied wide band gap semiconductor photocatalyst. The activities of ZnO nanomaterials with different ratios of exposed crystal planes are however less understood. In this work, three different ZnO single crystals exposing different crystal planes were studied: (0001), (1-100), and (11-20). The ZnO samples were characterized with polarized Raman spectroscopy and XRD, and their photocatalytic activities were quantified by means of methylene blue degradation using in situ spectrophotometry. The ZnO (1-100) surface showed three times higher photocatalytic activity than the other two surfaces. The results are discussed in terms of crystal facet dependent reactivity due to differences in surface structure and surface potential. Since it is possible to synthesize ZnO particles and structures with different ratios of exposed crystal planes, this finding may be of importance to guide synthesis of more efficient, tailor-made ZnO photocatalysts for water cleaning.

Place, publisher, year, edition, pages
2019.
Keywords [en]
Zinc oxide, Photocatalysis, Polarized Raman Spectroscopy
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-397294OAI: oai:DiVA.org:uu-397294DiVA, id: diva2:1371231
Conference
E-MRS Spring Meeting 2019, Symposium H, Materials for applications in photocatalysis and photoconversion
Funder
Swedish Research Council Formas, 2016-00908Available from: 2019-11-19 Created: 2019-11-19 Last updated: 2019-11-19

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Thyr, JakobÖsterlund, LarsEdvinsson, Tomas

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