@article{oai:nagoya.repo.nii.ac.jp:00023122, author = {Kajita, Shin and Yoshida, Tomoko and Ohno, Noriyasu and Ishida, Tomoya and Kitaoka, Daiki}, issue = {10}, journal = {Japanese Journal of Applied Physics}, month = {Oct}, note = {In this study, plasma irradiations to titanium were conducted to enhance the photocatalytic activity of titanium oxide. When titanium is exposed to He plasmas, various morphology changes occur as forming nano-bubbles near the surface. Photocatalytic activity of the oxidized helium plasma irradiated titanium samples with nano-cones and microstructures were assessed by the hydrogen production from aqueous methanol solution. It is shown that the He plasma irradiation increases the photocatalytic activity more than double. Moreover, nitrogen mixture plasma irradiation to titanium (oxide) was conducted for doping nitrogen, which has been regarded as method to create visible light reactivity. It is shown from X-ray photoelectron spectroscopy (XPS) analysis that nitrogen doping has been successfully conducted under specific conditions.}, pages = {106202--106202}, title = {Enhancement of photocatalytic activity of TiO2 by plasma irradiation}, volume = {55}, year = {2016} }