[13p-P7-1~17] 6.4 Thin films and New materials

[13p-P7-17] The effect of lattice distortion of TiO₂ on its photocatalytic performance

〇Masami Nishikawa¹, Soichiro Yuto¹, Tomohiko Nakajima², Tetsuo Tsuchiya², Nobuo Saito¹ (1.Nagaoka Univ. of Tech., 2.AIST)

Keywords:photocatalyst, lattice distortion, TiO2

To develop the visible-light response of TiO₂, various heterogeneous elements have been doped in the lattice of TiO₂. Since the ionic radius of the heterogeneous element is different from the elements consisting of TiO₂, the doping of the heterogeneous elements is accompanied by the lattice distortion of TiO₂. However, the effect of the lattice distortion of TiO₂ on the photocatalytic activity has not been clear. In this work, we examined the effects of the lattice distorted TiO₂ films epitaxially grown on the lattice-expanded substrates on the photocatalytic activity.