The ZnO and SnO2 nanoparticles were synthesized using the co-precipitation method. The samples were calcined at 550°C. The samples were characterized by various advanced techniques such as Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), UV- Visible Spectroscopy and Particle Size Analyzer. The XRD studies revealed that the average crystallite size of ZnO and SnO2 nanoparticles were found in the range of 27.8 nm and 24.6 nm. The various functional groups for synthesized nanoparticles were detected by FT-IR spectroscopy analysis. The optical properties of the samples are investigated by measuring the UV-Visible Spectroscopy. The Particle size analyzer studies confirmed that the ZnO and SnO2 as a nanoparticles. The particle size of the ZnO was 42 nm and the particle size of the SnO2 was 44 nm. The ZnO nanoparticle is used to make nanorod sensor and SnO2 nanoparticle is used for catalyst for photodegradation of dyes and illumination with UV light.