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The BiOCl/Bi12O17Cl2@MoS2 (BOC-MS) composites were successfully synthesized by a facile method at room temperature.The physicochemical properties of the as-obtained samples were characterized by X-ray diffractometer (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),X-ray photoelectron spectroscopy (XPS),ultraviolet-visible diffuse reflection spectra (UV-Vis DRS),photoluminescence (PL),Brunauer-Emmett-Teller-Barrett-Joyner-Halenda (BET-BJH),and electron spin resonance (ESR) in detail.Moreover,the in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was applied to elucidate the adsorption and photocatalytic reaction mechanism.The optimized BOC-MS-1.0 composites exhibited excellent visible light photocatalytic capability (51.1％) and photochemical stability for removal of NO.Based on the DMPO-ESR spin trapping,the ·O2-radicals and ·OH radicals were identified as the main active species generated from BOC-MS-1.0 under visible light irradiation.The enhanced photocatalytic performance can be ascribed to the positive synergetic effect of the MoS2 and the effective carrier separation ability.