Fig. 6 from Rapid preparation of terbium-doped titanium dioxide nanoparticles and their enhanced photocatalytic performance WangZhencui SongYuechao CaiXingfei ZhangJun TangTianle WenShaobai 2019 Effect of initial pH value on photocatalytic activity (10 mg•L-1 MB, 1.0 g•L-1 Tb-TiO2 dose, T = 298 K).