Preparation and Characterization of ZnO Nanoparticles: Application to Sensor Devices

Abstract

ZnO nanoparticles were prepared by precipitation method from zinc chloride. The powder was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, selected-area electron diffraction, UV-vis optical absorption and photoluminescence spectroscopy analyses. XRD patters showed that ZnO nanoparticles have hexagonal unit cell structure. SEM &TEM pictures reveal the morphology and particle size of prepared ZnO nanoparticles. The UV-vis absorption spectrum shows an absorption band at 355 nm due to ZnO nanoparticles. The photoluminescence spectrum exhibits two emission peaks one at 392 nm corresponds to band gap excitonic emission and another located at 520 nm due to the presence of singly ionized oxygen vacancies. The synthesis method has potential for application in manufacturing units due to ease processing and more economical reagents.

Keywords

• ZnO
• Nanoparticles
• XRD
• SEM
• FTIR.