Schedule 1 [P64] Effect of metal ion doping in BaTi4O9 to the photocatalytic property toward the overall H2O splitting 光触媒「学生ポスター発表賞審査対象」 〇Toshiyuki Harada1, Akira Yamakata2, Yoshihisa Sakata1 (1. Yamaguchi Univ., 2. Toyota technological Institute)