Preparation and characterization of Co doped ZnO nanoparticles

Authors

  • Mustafa H. Al-Hakeem , Nadia A. Abdulrahman, and Abdulkareem A. Alsammaraie

Abstract

We were prepared 5wt% Cobalt doped zinc oxide (Co-ZnO) nano crystals  via hydrothermal technique at different temperatures of 70, 100, 130, 160 and 190oC.  UV spectroscopy, XRD crystallography, EDS measurements, FE-SEM microscopy were used for characterizations and TEM microscopy. UV spectroscopy has shown absorbance peaks at: 370, 375, 377, 378 and 380 nm, and accordingly, values of energy gaps of: 3.35324, 3.30853, 3.29098, 3.28174, and 3.26447   eV; this is at the range of temperatures of: 70, 100, 130, 160 and 190oC, respectively. XRD crystallography has shown intense diffraction angles for the indices of: 100, 002, 101, 102, 112, 110, 103, 200, 112, 201, 311, 004 and 202 at a range of diffraction angles between10 to 80 degree. We experiential   two extra   indices at the diffraction angles of 44.56 o and 72.44o which have not been   mentioned formerly by others, and we suppose this might indicates the formation of hexagonal crystallites with two extra planes.  We measurements  EDS which  have indicated the only occurrence of Co, Zn and O. FE-SEM microscopy has shown an average diameter of 31.45nm for 70oC and 103.06 nm for 190oC, also, an average crystallite-length of58.93 nm for 70oC and 151.72 nm for 190oC.

Published

2020-02-29

Issue

Section

Articles