Photoluminescence emission from nanostructured porous preparations of CdS-ZnTiO₃ assembled nanoparticles

This study reports the structural and optical properties of CdS/ZnTiO₃ nanocomposites prepared using a chemical bath and different titanate concentrations. Commercial ZnTiO₃ nanoparticles were introduced into a chemical bath that had been used to produce CdS semiconductor nanoparticles (NPs). Here, the growing CdS crystallites precipitated onto the suspended zinc titanate NPs. X-ray diffraction patterns revealed that samples of CdS/ZnTiO₃ nanopowders were made of cubic ZnTiO₃ and hexagonal CdS wurtzite. The morphology of the particles was studied using transmission electron microscopy and scanning electron microscopy images. These images demonstrated the different characteristics of the CdS/ZnTiO₃ nanocomposites and their dependence on titanate concentration when placed into the CdS-growing solution. Photoluminescence spectra showed three main emission bands for the electron transitions in the CdS/ZnTiO₃ composite. This composite produced three photoluminescence bands, the intensities of which depended on composite shape, which in turn depended on the relative concentrations of CdS and ZnTiO₃ .