Charge transfer behaviors over MOF-5@g-C3N4 with NixMo1−xS2 modification

The composite photocatalyst NixMo1−xS2/MOF-5@g-C3N4 was successfully synthesized by means of hydrothermal with two step methods and the effective photocatalytic activity improvement was obtained. With the introduction of NixMo1−xS2, the H2 production reached the maximum about 319 μmol under continuous visible light irradiation for 5 h, which was 30 times higher than that of pure g-C3N4 photocatalyst. A series of characterization results shown that the MOF-5@g-C3N4 on the surface of NixMo1−xS2 provided the more active sites and improved the efficiency of photo-generated charge separation with SEM, XRD, TEM, EDX, XPS, UV-vis DRS, BET, FTIR, transient fluorescence and electro-chemistry etc. and the results of which were in good mutual corresponding with each other. Furthermore, the reaction mechanism over the compound catalyst Nix-Mo1−xS2/MOF-5@g-C3N4 was proposed.