Fig. 6From: Hydrothermal derived nitrogen doped SrTiO3 for efficient visible light driven photocatalytic reduction of chromium(VI)Influence of initial pH on the Cr(VI) removal effect (a) and relationship between ln(C0/C) and the reaction time (b). Cr(VI) concentration as a function of visible light irradiation time in the presence of nitrogen doped SrTiO3 with various initial HMT content (c) and relationship between ln(C0/C) and the reaction time (d)Back to article page