Schedule 4 [P39] Preparation of Sr-Nb oxides exhibits highly photocatalytic performance to the overall H2O splitting 光触媒「学生ポスター発表賞審査対象」 〇Naoki Washizu1, Akira Yamakata2, Yoshihisa Sakata1 (1. Yamaguchi Univ., 2. Okayama Univ.)