A visible light driven 1D/2D-NiMoO 4 /BiOI nanocomposite photocatalyst was constructed by single step solvothermal method. Here, various composition of NiMoO 4 /BiOI nanocomposites were prepared by loading different amounts of NiMoO 4 (1, 2, 3 wt %) to the BiOI. Among the as-prepared photocatalysts, 1 wt % of NiMoO 4 on BiOI (NMBI-1) showed superior photocatalytic activity (92.7 %) under visible light irradiation. On analysis, the optimized NMBI-1 exhibited a lower bandgap energy value of 1.64 eV and also found to show around 2 and 3.7-times higher degradation ability for the removal of MB than the pure NiMoO 4 and BiOI respectively. In addition, the optimized NMBI-1 nanocomposite photocatalyst exhibited excellent photostability and recyclability properties. The charge carriers on the interface of the NiMoO 4 and BiOI enabled the easy transfer via the newly formed heterojunction, thereby increasing the photocatalytic performance. Additionally, the radical scavengers such as h + and . OH were found to be the major species in the removal of MB under visible light illumination. Therefore, the 1D/2D-NiMoO 4 /BiOI nanocomposite photocatalyst materials could possibly be considered for the wastewater remediation processes.