Fabrication of a Sb2MoO6/g-C3N4 Photocatalyst for Enhanced RhB Degradation and H2 Generation

In this work, Sb2MoO6 was applied to the field of photocatalysis and employed to modify g-C3N4 for the first time so as to construct the Sb2MoO6/g-C3N4 heterojunction. Results reveal that 7.5% Sb2MoO6/g-C3N4 showed the best activity during photocatalytic RhB degradation and H2 evolution in water. Rates of RhB degradation and H2 evolution were 6.6 and 5.4 times higher than those of g-C3N4, respectively. According to UV–visible absorption spectra, transient photocurrent curves, photoluminescence spectra, and electrochemical impedance spectra, outstanding performance of 7.5% Sb2MoO6/g-C3N4 was benefited from increases in response of visible light and efficient separation of photogenerated carriers. Furthermore, a possible charge carriers' transmission route was proposed based on the band gap position and characterization consequence.