Highly efficient photoelectrochemical and photocatalytic anodic TiO2 nanotube layers with additional TiO2 coating

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dc.contributor.author Sopha, H
dc.contributor.author Krbal, Milos
dc.contributor.author Ng, S
dc.contributor.author Přikryl, Jan
dc.contributor.author Zazpe, Raul
dc.contributor.author Yam, F.K.
dc.contributor.author Macák, Jan
dc.date.accessioned 2017-07-10T08:13:51Z
dc.date.available 2017-07-10T08:13:51Z
dc.date.issued 2017
dc.identifier.issn 2352-9407
dc.identifier.uri http://hdl.handle.net/10195/68974
dc.description.abstract In this work, strong beneficial effects of thin and uniform TiO2 coatings within TiO2 nanotube layers for photocurrent generation and photocatalytical degradation of methylene blue are demonstrated for the first time. TiO2 nanotube layers were coated by TiO2 of various thicknesses (from 2.8 nm to 22 nm) using atomic layer deposition (ALD) and compared with TiO2 nanotube layers decorated by TiO2 nanoparticles (using established TiCl4 treatment) and with blank (uncoated) layers. By means of photocurrent measurements and cyclic voltammetry, it is demonstrated that the most efficient charge carrier separation can be achieved for TiO2 nanotube layers with an optimal ALD TiO2 coating thickness ≈11 nm. Significant differences in flatband potentials and carrier density among all nanotube layers were revealed by Mott-Schottky measurements. Photocatalytic decomposition rates for methylene blue solutions were significantly enhanced for ALD TiO2 coated TiO2 nanotube layers compared to their uncoated or TiO2 nanoparticles - decorated counterparts. A perfect agreement in trends was obtained for photocurrent and photocatalytic results. cze
dc.format p.104-110 eng
dc.language.iso en cze
dc.publisher Elsevier cze
dc.relation.ispartof Applied Materials Today. 2017. Vol. 9
dc.rights Attribution-NonCommercial-NoDerivs 4.0 *
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ *
dc.subject Atomic layer deposition cze
dc.subject Coating cze
dc.subject Photocatalysis cze
dc.subject Photoelectrochemistry cze
dc.subject TiO2 nanotube layers cze
dc.title Highly efficient photoelectrochemical and photocatalytic anodic TiO2 nanotube layers with additional TiO2 coating cze
dc.type Article cze
dc.peerreviewed yes eng
dc.publicationstatus published eng
dc.identifier.doi 10.1016/j.apmt.2017.06.002
dc.relation.publisherversion http://www.sciencedirect.com/science/article/pii/S2352940717301178
dc.project.ID EC/H2020/638857/EU/Towards New Generation of Solid-State Photovoltaic Cell: Harvesting Nanotubular Titania and Hybrid Chromophores/CHROMTISOL
dc.identifier.scopus 2-s2.0-85020926311

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Attribution-NonCommercial-NoDerivs 4.0 Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 4.0

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