Abstract

Flower-like, nanostructured. N-doped TiO2 (N-TiO2) films were fabricated using a low-temperature hydrothermal method. The morphology, crystalline phase, and composition of these flower-like nanostructured films were characterized systematically by scanning electron microscopy. X-ray diffraction, X-ray photoelectron spectroscopy, and UV-vis spectroscopy. The photoelectrochemical properties of N-TiO2 films in 0.5 M NaCl solution were evaluated under illumination and in the dark through electrochemical measurements. Flower-like nanostructured TiO2 films exhibited a drastically enhanced photocurrent in the UV light region and a notable absorption in the visible light region (600-700 nm). The negative shifts of the electrode potentials of 316L stainless steel coupled with N-doped TiO2 photoanodes are 470 and 180 mV under UV and visible light irradiation, respectively The flower-like, nanostructured, N-doped TiO2 films were able to function effectively as photogenerated cathodic protection for metals under UV and visible light illumination Such photogenerated cathodic protection could last a period of 5.5 h even in darkness. (C) 2010 Elsevier B V. All rights reserved.

Keywords

Hydrothermal; Flower-like; N-doped; TiO2 film; Photocathodic protection

Published in

Surface and Coatings Technology
2010, Volume: 205, number: 2, pages: 557-564

UKÄ Subject classification

Materials Chemistry
Physical Chemistry


Publication identifier

DOI: https://doi.org/10.1016/j.surfcoat.2010.07.030

Permanent link to this page (URI)

https://res.slu.se/id/publ/85299