A highly active photocatalyst based on g-C 3N 4 coated SrTiO 3 has been synthesized simply by decomposing urea in the presence of SrTiO 3 at 400 °C. The catalyst demonstrates a high H 2 production rate ∼440 μmol h −1/g catalyst in aqueous solution under visible light irradiation, which is much higher than conventional anion doped SrTiO 3 or physical mixtures of g-C 3N 4 and SrTiO 3. The improved photocatalytic activity can be ascribed to the close interfacial connections between g-C 3N 4 and SrTiO 3 where photo-generated electron and holes are effectively separated. The newly synthesized catalyst also exhibited a stable performance in the repeated experiments.