Synthesis and characterization of Mn2+ doped CdOZn3(PO4)2 nanocomposites

Abstract

Undoped and Mn2+ doped CdOZn3(PO4)2 nanocomposites are fruitfully synthesized by chemical precipitation process at room temperature. The morphology, structure and spectroscopic properties of the prepared samples are characterized by X-ray diffraction (XRD), optical absorption, Scanning electron microscope (SEM) with EDS, Fourier transform infrared (FT-IR) spectroscopy, Photolumiscence (PL) and Electron Paramagnetic Resonance (EPR). XRD data confirms the cubic phase of CdO and monoclinic phase of Zn3(PO4)2. Strain and dislocation density are also calculated from XRD studies. Optical absorption spectrum of Mn2+ doped CdOZn3(PO4)2 nanocomposite shows different spin-forbidden DMSO-d6 bands which are the characteristics of octahedral site symmetry related to Mn2+. The crystal field parameter Dq and inter electronic repulsion parameters (B and C) are deliberate using optical absorption data. Surface morphology of sample is firm by Using Scanning electron microscopy (SEM) and the distribution of Zn, Cd, phosphate and oxygen species in the prepared sample is identified by EDS. PL studies recognize the white light emission. The ‘g’ value of the nanocomposite material synthesized is lesser than (negative shift) the free electron value (2.0023), which gives ionic nature to the bonding and confirms the presence of Mn2+ in distorted octahedral site symmetry.