[en] A well-dispersed Fe⁰/Fe₃O₄/g-C₃N₄ ternary hybrid composition was successfully synthesized through a calcination route followed by a hydrothermal treatment. It was significant to find that Fe⁰/Fe₃O₄/g-C₃N₄ possesses the optimal photocatalytic efficiency and excellent reusability toward Cr(VI) and RhB. The enhanced photocatalytic efficiency was attributable to the comprehensive factors including intimate contact of Fe⁰/Fe₃O₄ with g-C₃N₄, efficacious recombination inhibition of photoexcited carries, and synergistic interaction between each composition. Moreover, the photoredox catalytic mechanism of Fe⁰/Fe₃O₄/g-C₃N₄ was clearly proved by transient photocurrent responses, PL spectra properties, and exploring the formed active radicals that contribute to the improved photoredox activity. It is expected that our work could offer a notional guidance to design a promising photocatalytic compound for simultaneously degrading heavy metal ions and organic pollutant.