▎ 摘　　要

A graphene oxide nanocomposite with bis(1,10-phenanthroline)(N-(2-aminoethyl)-4-(4-methyl-2,2-bipyridine-4-yl)formamide) ruthenium (Ru(phen)(2)(bpy-NH2)(PF6)(2)), a ruthenium complex, was synthesized by amidation reaction between amino group of the ruthenium complex and carboxyl group of GO. The as-prepared Ru(II)-GO composite was characterized by infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet-visible (UV-Vis) absorption spectra, fluorescence spectra, surface photovoltage (SPV) spectrum and transient photovoltage (TPV) technology. This nanocomposite showed a typical p-type character and an enhanced photovoltaic effect at long timescale of about 3 x 10(-3) s compared to GO alone. A reversible rise/decay of the photocurrent in response to the on/off illumination step was also observed in a photoelectrochemical cell of the Ru(II)-GO composite. The photocurrent response of the Ru(II)-GO film was remarkably higher than that of GO film. Therefore, this Ru(II)-GO composite is believed to be a promising p-type photoelectric conversion material for further photovoltaic applications. (C) 2014 Elsevier B.V. All rights reserved.