Novel Fe-2(MoO4)(3)/g-C3N4 composites were synthesized by a facile mixing-calcination method. The photocatalytic activity of the Fe-2(MoO4)(3)/g-C3N4 hybrid was evaluated via RhB degradation and H-2-production under visible light irradiation. Results indicated that the Fe-2(MoO4)(3)/g-C3N4 binary composite exhibited excellent photocatalytic activity. The optimal hybrid could produce hydrogen 6.6 times faster than pure g-C3N4 from water-methanol solution under visible light irradiation. For the photocatalytic degradation of RhB, it showed a degradation rate of 0.070 min-1, which was 7.8 times higher than that of pure g-C3N4. Moreover, the composite showed high stability and extensive adaptability in degradation of other organic pollutants. The N-2 physical absorption measurement and UV-visible diffuse reflection spectroscopy suggested that the coupling of Fe-2(MoO4)(3) increased the BET specific surface area and visible light absorption, both of which favored the photocatalytic reaction. However, the main reason of the enhanced activities were attributed to the interfacial transfer of photogenerated electrons and holes between Fe-2(MoO4)(3) and g-C3N4, leading to the effective charge separation in the composite, which were evidenced by photoluminescence spectroscopy and photocurrent analysis. This work may provide some useful information for the future design and practical application of multifunctional hybrids photocatalysts in water purification. (C) 2016 Elsevier Ltd. All rights reserved.