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To achieve enhanced photocatalytic activity for the degradation of lindane,we prepared metal-semiconductor composite nanoparticles (NPs).Zn@ZnO core-shell (CS) nanocomposites,calcined ZnO,and Ag-doped ZnO (ZnO/Ag) nanostructures were prepared using pulsed laser ablation in liquid,calcination,and photodeposition methods,respectively,without using surfactants or catalysts.The as-prepared catalysts were characterized by using X-ray diffraction (XRD),field-emission scanning electron microscopy,high-resolution transmission electron microscopy,ultraviolet-visible (UV-vis) spectroscopy,and photoluminescence spectroscopy.In addition,elemental analysis was performed by energy dispersive X-ray spectroscopy.The obtained XRD and morphology results indicated good dispersion of Zn and Ag NPs on the surface of the ZnO nanostructures.Investigation of the photocatalytic degradation of lindane under UV-vis irradiation showed that Zn@ZnO CS nanocomposites exhibit higher photocatalytic activity than the other prepared samples.The maximum degradation rate of lindane was 99.5％ in 40 rin using Zn@ZnO CS nanocomposites.The radical trapping experiments verified that the hydroxyl radical (·OH) was the main reactive species for the degradation oflindane.