Optical,Structural, and Magnetic Properties of ZnO:Co Nanoparticles Prepared by a Thermal Treatment of Ball Milled Precursors |
| |
| Authors: | I A Sarsari H Salamati P Kameli F S Razavi |
| |
| Affiliation: | (1) Department of Industrial and Systems Engineering, College of Electrical Engineering and Computer Science, Chung Yuan Christian University, Chungli, Taoyuan 320, Taiwan, ROC;(2) Chemical Systems Research Division, Chung Shan Institute of Science and Technology, Longtan, Taoyuan 325, Taiwan, ROC;(3) Department of Applied Chemistry and Materials Science, Chung Cheng Institute of Technology, NDU, Dasi, Taoyuan 335, Taiwan, ROC;(4) Department of Chemical Engineering and Materials Science, Ming Hsin University of Science and Technology, Hsinfeng, Hsinchu 304, Taiwan, ROC; |
| |
| Abstract: | In this study, ZnO nanoparticles with different cobalt concentration were prepared by a simple and rapid method. This method
is based on a short time solid state milling and calcinations of zinc acetate, cobalt acetate, and citric acid powders. The
samples were characterized using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Fourier Transform
Infrared (FTIR), photoluminescence, and UV-vis. spectroscopy. It was shown that a very low substitution of Co (less than 1%
of molecular weight) has little effect on the lattice parameters of ZnO and significantly decreases the band gap (E
g
) value of the synthesized ZnO:Co nanoparticles. Calculation based on the XRD data shows that the average crystallite sizes
of ZnO particles are nearly 18 nm. Photoluminescence spectroscopy shows that many defects such as interstitial zinc, zinc
vacancy, and exciton recombination are responsible for the observed optical properties. Magnetization measurements which were
performed by using a superconducting quantum interference device (SQUID) magnetometer determine the paramagnetic behavior
for all samples due to the absence of oxygen vacancy. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
