(Ga1-xZnx)(N1-xOx)-rGO (reduced graphene oxide) composites photocatalysis with different GO contents were prepared by hydrothermal method and subsequent nitridation. (Ga1-xZnx)(N1-xOx)-rGO composites were characterized via XRD, SEM, XPS, Raman spectra, and N-2 adsorption-desorption isothermals. The rGO sheets in the nanocomposite photocatalyst are decorated with (Ga1-xZnx)(N1-xOx) nanoparticles. Compared with bare (Ga1-xZnx)(N1-xOx), the (Ga1-xZnx)(N1-xOx)-rGO showed higher specific surface area and mobility of charge carriers and enhanced photocatalytic activity for visible-light driven water splitting. The photocatalyst with 30 wt.% original GO shows the best activity, that the rate of H2 production is almost 4.5 times higher than that of bare (Ga1-xZnx)(N1-xOx)-rGO particles. Herein, the results provide new insights into (Ga1-xZnx)(N1-xOx)-rGO composite as high performance photocatalyst and their potential application in visible-light driven water splitting H-2 production. (C) 2015 Elsevier B.V. All rights reserved.