[en] The flake-like nanoscale γ-bismuth molybdate (Bi₂MoO₆) powders as a novel photocatalyst was prepared using Bi(NO₃)₃.5H₂O and Na₂MoO₄.2H₂O as raw materials by a simple low-temperature molten salt method at 350 deg. C for 1, 4 and 8 h, respectively. The as-prepared samples were characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-vis absorption spectra (UV-vis). The photocatalytic activity of Bi₂MoO₆ crystals was evaluated using the photocatalytic oxidation of rhodamine B (RhB) at room temperature under ultraviolet irradiation. It was found that the band gap adsorption edge of Bi₂MoO₆ is estimated to be 477 nm corresponding to the band gap energy to be 2.60 eV. In addition, the Bi₂MoO₆ powders exhibit good photocatalytic properties to photodegrade RhB at room temperature. Finally, the mechanism of photocatalytic property of Bi₂MoO₆ had been also discussed