Photocatalytic Activity, Microstructures and Luminescent Study of Ti-ZS:M Nano-composites Materials

Our main interest in this work is in the synthesis and improvement of the physical properties of TiO2-based nanocomposites modified by coupling to Zn2SiO4:Mn (ZS:M) nanoparticles. The micro-structural characterizations carried out by using X-ray diffraction(XRD)and transmission electron microscopy(TEM)techniques of various TiO2-ZS:M (Ti-ZS:M) samples at different temperatures revealed the formation of the anatase phase. The optical properties of TiO(2)modified by ZS:M nanoparticles shows a shift in absorption band toward UV region reflecting a significant an increase in the energy band gap for anatase phase at 3.36 eV, which is larger than the 3.06 eV found for the Dugussa P25 TiO2. In this work, the influence of the annealing temperature on the microstructural, physico-chemical characteristics of the different samples is presented and their correlation with their photoluminescence in the visible spectral region has been investigated.