Nano ZnWO4 particles have been successfully synthesized through sol-gel process. The size and morphology of ZnWO4 nano particle can be controlled by adjusting the reaction time and temperature. The prepared nano ZnWO4 shows band gap energy of 2.9 eV calculated from UV-DRS, Scanning Electron microscope (SEM), EDS, Transmission Electron microscope (TEM) and FT-IR spectra techniques. The resultant sample is a phase pure ZnWO4. Further the Catalysis studies have been studied by the oxidation of functionalized benzyl alcohols to its corresponding aldehydes in good yields, and it was observed that the prepared ZnWO4 nano particles have better catalytic efficiency.