Schedule 2 [P46] Effect of metal ion doping of BaTi4O9 photocatalyst 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. Okayama Univ.)