Author(s)

Michio Kaneko^1*, Kiyonori Tokuno², Kazuo Yamagishi³, Takao Wada³, Tsuyoshi Hasegawa³

¹Steel Research Laboratories, Nippon Steel and Sumitomo Metal Corporation, 20-1 Shintomi Futtsu, Japan.
²Head Office, Nippon Steel and Sumitomo Metal Corporation, Tokyo, Japan.
³Toyo Rikagaku Kenkyusho Corporation, Niigata, Japan.

A commercially pure titanium sheet with titanium carbide (TiC) precipitated in its surface layer was anodized in NH₄NO₃ aqueous solution and heat treated in air. The photocatalytic activity of titanium dioxide powder collected from the surface of the anodized titanium sheet was evaluated under ultra-violet and visible light irradiation. It showed relatively high photocatalytic activity in 0.1 mol/l potassium iodide solution, which was almost equal to the activity level of TiO₂ powder (P-25) manufactured by Degussa Corporation. The better photocatalytic activity under ultra-violet irradiation is considered to be related to the formation of anatase type titanium dioxide. Photocatalytic activity under visible light irradiation was also observed, which was considered to be attributable to impurity doping, (carbon), in the titanium dioxide powder.

Photocatalysis, Titanium, Titanium Dioxide Powder, Anodic Oxidation, Ultra-Violet, Visible-Light Response

Kaneko, M. , Tokuno, K. , Yamagishi, K. , Wada, T. and Hasegawa, T. (2017) Photocatalytic Activity of Titanium Dioxide Powder Fabricated from an Anodized Titanium Sheet under Ultra-Violet and Visible Light Irradiation. Journal of Surface Engineered Materials and Advanced Technology, 7, 13-23. doi: 10.4236/jsemat.2017.71002.