A facile synthesis of TiO_2/SiO_2/CdS-nanocomposites 'optical and electrical' investigations

摘要

The controlled synthesis of TiO_2/SiO_2/CdS-nanocomposites fabrication by hydrothermal assisted route has been successfully performed. Without any doubt this novel strategy is one of the central issues in current Nano-technology and Materials Science. Those hybrid nanocomposites were characterized by spectroscopes and electron microscopic in several investigations, e.g. X-ray diffraction (XRD), Raman spectroscopy, UV-visible spectroscopy, Scanning electron microscope (SEM) and dielectric dispersion. The average grain size was found to be 28 nm by using X-ray diffraction analysis and nanocomposites were confirmed by the Scanning Electron Microscopy (SEM). The well crystalline distinguishable peak shifts of individual composite materials (e.g. Anatase titanium, SiO_2, CdS) were carried out by the Raman spectrum. Indeed, optical properties were obtained by UV-visible absorption spectrum and the calculated optical band gap of the nanocom-posite was found to be 3.31 eV. Moreover, typical investigations of dielectric behavior, e.g. dielectric constant, dielectric loss, and AC conductivity properties were also carried out at different frequencies and ambient conditions of temperatures. A successful attempt revealed through this performance puts the hybrid nanostructure at the top level in the state of the art in application oriented research in high crystalline composite materials.