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In this work, Sb 2 MoO 6 was applied to the field of photocatalysis and employed to modify g-C 3 N 4 for the first time so as to construct the Sb 2 MoO 6 /g-C 3 N 4 heterojunction. Results reveal that 7.5% Sb 2 MoO 6 /g-C 3 N 4 showed the best activity during photocatalytic RhB degradation and H 2 evolution in water. Rates of RhB degradation and H 2 evolution were 6.6 and 5.4 times higher than those of g-C 3 N 4 , respectively. According to UV−visible absorption spectra, transient photocurrent curves, photoluminescence spectra, and electrochemical impedance spectra, outstanding performance of 7.5% Sb 2 MoO 6 /g-C 3 N 4 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.

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