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Fabrication and Significant Photoelectrochemical Activity of Titania Nanotubes Modified with Thin Indium Tin Oxide Film

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Acta Metallurgica Sinica(English Letters) 2017年第12期30卷 1210-1220页

作者： katarzyna siuzdak Mariusz Szkoda Jakub Karczewski Jacek Ryl Kazimierz Darowicki katarzyna Grochowska Centre for Plasma and Laser Engineering The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences Fiszera 14 80-231 Gdansk Poland Department of Chemistry and Technology of Functional Materials Chemical Faculty Gdańsk University of Technology Narutowicza 11/12 80-233 Gdansk Poland Faculty of Applied Physics and Mathematics Gdansk University of Technology Narutowicza 11/12 80-233 Gdafisk Poland Department of Electrochemistry Corrosion and Materials Engineering Gdansk University of Technology Narutowicza 11/12 80-233 Gdafisk Poland

Ordered titanium dioxide nanotubes （TiOaNTs） modified with indium tin oxide （ITO） films were obtained via magnetron sputtering, in which ITO plate was used as a target, onto the as-anodized titania support followed by the calcination process. The morphology of fabricated material with deposited oxide was investigated using scanning electron microscopy. Raman and UV-Vis spectroscopies were utilized to characterize crystalline phase and optical properties of prepared samples, whereas X-ray photoelectron spectroscopy allowed determining the binding energy of present elements. In the case of titanium, three various oxidation states were identified and also the presence of indium and tin was confirmed. The electrochemical test carried out when the sample was exposed to light allows for selection of the most photoactive material. The highest photocurrent was registered when only 5-nm ITO layer was sputtered, and it equals 256 and 133 μA cm^-2 for the electrode material immersed in 0.5 M KOH and K2SO4 electrolytes, respectively, that is accordingly 3.5 and 4.4 times higher than the one observed for pristine titania. Furthermore, ITO-modified titania exhibits excellent photostability upon prolonged illumination that is of key importance for possible application in light-driven processes.

关键词： Titania nanotubes Indium tin oxide Photoactivity Anodization Magnetron sputtering Electrochemical activity

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