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Self-organized TiO2 nanotubes grown on Ti substrates with different crystallographic preferential orientations: Local structure of TiO2 nanotubes vs. photo-electrochemical response
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SYSNO ASEP 0486882 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Self-organized TiO2 nanotubes grown on Ti substrates with different crystallographic preferential orientations: Local structure of TiO2 nanotubes vs. photo-electrochemical response Tvůrce(i) Krbal, M. (CZ)
Sopha, H. (CZ)
Pohl, D. (CZ)
Beneš, L. (CZ)
Damm, C. (DE)
Rellinghaus, B. (DE)
Kupčík, Jaroslav (UACH-T) SAI, RID, ORCID
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Šubrt, Jan (UACH-T) SAI, RID
Macák, J. M. (CZ)Zdroj.dok. Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 264, FEB (2018), s. 393-399Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Anatase ; Anodization ; Photo-current ; Stoichiometry ; TiO nanotubes 2 Vědní obor RIV CA - Anorganická chemie Obor OECD Inorganic and nuclear chemistry Institucionální podpora UACH-T - RVO:61388980 UT WOS 000424644800044 EID SCOPUS 85041426765 DOI https://doi.org/10.1016/j.electacta.2018.01.113 Anotace Here we report on structural properties and the photo-electrochemical response of annealed TiO 2 nanotube layers, grown on four different Ti substrates by an identical anodization process. TiO 2 nanotube layers were grown on Ti substrates by anodization in glycerol containing NH 4 F and water. The layers were then annealed at 400 °C for 1 h in air. Photocurrent densities of annealed nanotubes were recorded upon irradiation with ultraviolet (UV) light at a constant potential of 0.4 V, in a 0.1 M Na 2 SO 4 aqueous solution. Approximately, a 280% difference in the photocurrent densities was recorded from TiO 2 nanotubes fabricated from different Ti substrates. To elucidate the origin of this difference, the nanotube layers were scrutinized by Mott-Schottky measurements, X-ray diffraction (XRD) and Electron Energy Loss Spectroscopy (EELS). Inspection of the XRD patterns revealed preferential crystallographic orientations in various Ti substrates from which TiO 2 nanotube layers were produced. Subsequent EELS analyses of the annealed nanotube layers disclosed significant differences in the Ti:O stoichiometry, in accordance with XRD evaluation of preferential orientation differences among used Ti substrates. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2019
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