Acta Metallurgica Sinica (English Letters) ›› 2017, Vol. 30 ›› Issue (12): 1210-1220.DOI: 10.1007/s40195-017-0653-9

Special Issue: 2017纳米材料专辑

• Orginal Article • Previous Articles     Next Articles

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

Katarzyna Siuzdak1, Mariusz Szkoda2, Jakub Karczewski3, Jacek Ryl4, Kazimierz Darowicki4, Katarzyna Grochowska1()   

  1. 1 Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdan′sk, Poland;
    2 Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdan′sk University of Technology, Narutowicza 11/12, 80-233 Gdan′sk, Poland;
    3 Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdan′sk, Poland;
    4 Department of Electrochemistry, Corrosion and Materials Engineering, Gdan′sk University of Technology, Narutowicza 11/12, 80-233 Gdan′sk, Poland;
  • Received:2017-07-18 Revised:2017-08-25 Online:2017-12-20 Published:2018-02-05

Abstract:

Ordered titanium dioxide nanotubes (TiO2NTs) 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.

Key words: Titania nanotubes, Indium tin oxide, Photoactivity, Anodization, Magnetron sputtering, Electrochemical activity