Synthesis and characterization of VO2+ doped ZnO–CdS composite nanopowder

• VO2+ doped ZnO–CdS composite synthesized by simple chemical precipitation method.
• Average particle size is found to be 17.7 nm.
• Spherical like structures were observed in SEM and TEM micrographs.
• Ionic bonding is observed between vanadyl ions and its ligands.
• Vanadyl ions entered into the host lattice as tetragonally distorted octahedral sites.

VO2+ doped ZnO–CdS composite nanopowder has been synthesized by chemical precipitation method. The prepared sample has been characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), FT-IR, photoluminescence (PL), optical absorption and EPR spectroscopy. From XRD pattern, average crystallite size is about 18 nm. SEM and TEM images showed sphere like structures. FT-IR spectrum indicates the presence of fundamental modes of ZnO, CdS and other functional groups. The PL spectrum of VO2+ doped ZnO–CdS composite nanopowder exhibits UV, blue and green emissions. Optical and EPR studies revealed the tetragonal compressed octahedral site symmetry for VO2+ ions. The bonding between VO2+ and its ligands is ionic.

TEM images of VO2+ doped ZnO–CdS composite nanopowder reveal that the sample contains spherical like structures. The average particle size of VO2+ doped ZnO–CdS composite nanopowder is around 20 nm. These results are in good agreement with X-ray diffraction data.Figure optionsDownload as PowerPoint slide