Synthesis And Characterization of Al Doped And (Co, Al) codoped ZnO Nanoparticles via Chemical coprecipitation Method

Pure, Al doped and (Co, Al) codoped ZnO nanopowders have been synthesized through chemical co precipitation method at Room temperature, using poly ethylene glycol (PEG) as stabilizing agent. The synthesized samples are characterized by Xray Diffraction (XRD), Scanning electron microscopy (SEM) EnergyDispersive Xray spectroscopy (EDS), Transmission electron microscopy (TEM), High resolution TEM, SAED and Vibrating sample magnetometer (VSM). XRD results reveals that all the samples possess hexagonal wurtzite crystal structure with no secondary phases. SEM analysis demonstrated the morphology of the Pure, Al doped and (Co, Al) codoped ZnO nanoparticles while EDS spectrum shows the incorporation of dopant elements. TEM illustrations reveal the exact size of the crystallites, which is approximately confirmed by the XRD data. HRTEM images of the Pure and Al doped ZnO nanoparticles shows clear lattice fringes about 5 nm and codoped images reveal lattice fringes are about 2 nm. In determining the magnetic properties, VSM technique has been used and VSM analysis of (Co, Al) codoped samples reveal Super paramagnetic or weak ferro magnetic nature at Room temperature.