Preparation technique of TiO2 nanoparticles was carried out by Sonochemical method which uses ultrasound for chemical reaction. The ultrasound intensity plays two different roles. The dispersion and production of nanoparticles with broken chemical bonds. Titanium tetraisopropoxide, ethanol and sodium hydroxide are used as precursor materials. Sonochemical process at different amplitudes were carried out at room temperature. Further formed TiO2 Nanoparticles were characterized through X-Ray diffraction (XRD), Particle Size Analyzer (PSA), Transmission Electron Microscopy (TEM).

Novel Ag2S/PbSO4 nanocomposites have been successfully synthesized by solvothermal process which propylene glycol used as a solvent. In this demonstration, sodium dodecyl sulfate (SDS) performs as a sulfur source to produce Ag2S/PbSO4, and also act as a surfactant and the samples were further studied by X-ray powder diffraction (XRD), surface morphological studies from scanning electron microscopy (SEM) and transmission electron microscopy (TEM), elemental estimation from Energy dispersive X-ray Spectroscopy (EDAX), also studied photoluminescence (PL). From photoluminescence studies, the absorption of nanocomposite with a band gap of 3.1 eV which depends on quantum confinement behavior. Besides, SEM investigation displayed the morphology and particle size of the final product, which were affected by the reaction time and surfactant.