▎ 摘　　要

A novel graphene-based nanocomposite composed of tris(4,4'-dicarboxy-2,2'-bipyridine) ruthenium chloride (Ru(dcbpy)(3)) sensitized TiO2 and reduced graphene oxide (RGO) was prepared by a colloidal blending method and characterized by X-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy and UV-vis diffuse reflectance spectroscopy. The nanocomposite demonstrated nice photocatalytic activity and stability for water reduction to produce hydrogen. The amount of H-2 evolved from the optimized Ru(dcbpy)(3)/TiO2/RGO/Pt catalyst is 959 mu mol g(-1) at pH 3 under 5 h visible-light irradiation. (C) 2013 Elsevier B.V. All rights reserved.