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In this paper, we successfully constructed a ternary metal/non-metal nanomaterial which can synergize Z-scheme heterojunction and plasmonic metal/semiconductor for enhancing visible light photoreduction of aqueous Cr(VI). The as-formed ternary metal/non-metal nanomaterial was composed of g-C 3 N 4 nanosheets mutual modified by Ag nanoparticles and Bi 4 O 7 . In the ternary nanomaterial, g-C 3 N 4 nanosheets and Bi 4 O 7 fabricated Z-scheme heterojunction, g-C 3 N 4 nanosheets and Ag nanoparticles formed plasmonic metal/semiconductor system, synchronously. The photodeposition experiments were designed to indirect demonstrate the Z-scheme heterojunction via photocatalytic oxidation and reduction deposition reactions, AgNO 3 was used as the electron acceptor and Pb(NO 3 ) 2 as the electron donor, photocatalytic reduction product and oxidation product were selectively deposited on g-C 3 N 4 nanosheets and Bi 4 O 7 , respectively, revealing the Z-scheme heterojunction was definite formed. In addition, X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), UV-vis absorption, and Fourier-transform infrared spectroscopy (FTIR) were studied to indicate that the plasmonic metal/semiconductor system was existent in the ternary nanomaterial. The visible light photoreduction of ternary Ag/Bi 4 O 7 /g-C 3 N 4 nanosheets was evaluated by photoreducing aqueous Cr(VI). The photoreduction results show that the ternary Ag/Bi 4 O 7 /g-C 3 N 4 nanosheets is much higher than the pristine bulk g-C 3 N 4 and g-C 3 N 4 nanosheets., (Copyright © 2018 Elsevier B.V. All rights reserved.)