Synthesis and Characterization of Silica Nanostructures in the Presence of Schiff-base Ligand via Simple Sonochemical Method

چکیده مقاله

Silica nanostructures were synthesized on the basis of modified stöber procedure via a sonochemical method and the reaction between TEOS (tetraethyl orthosilicate), ethylenediamine (en) and methanol in water, in the attendance of Schiff-base ligand (H2Salen) as capping agent. The effects of synthesis parameters such as: sonochemical irradiation time, sonochemical power and molar aspect ratio of Schiff-base ligand to TEOS were considered to achieve optimum situation. It was established that particle size, morphology and phase of the products could be affected by these parameters. The as synthesized silica nanostructures were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet–visible (UV–Vis) spectroscopy, and X-ray energy dispersive spectroscopy (EDS).