학술논문
Synthesis, Luminescence and Optical Properties of a CaMoO4Nano-Powder Prepared by Using the Precipitation Method
Document Type
Article
Author
Source
Journal of the Korean Physical Society; October 2019, Vol. 75 Issue: 7 p534-540, 7p
Subject
Language
ISSN
03744884; 19768524
Abstract
Nano powders of CaMoO4were synthesized by using the precipitation method, and the obtained powders were dried inside a vacuum oven at 120 °C. The phases of powders were analyzed by using X-ray diffraction (XRD), which revealed that CaMoO4was free from any extra phases. The surface morphologies of the powders were studied by using transmission electron microscopy (TEM), and the average particle sizes were quite small, being in the range of 7 nm. The optical properties were characterized by using ultraviolet-visible (UV-vis) absorption spectroscopy and the optical energy band gap was found to be 5.51 eV. The fluorescence decay time and the luminescence spectrum of the sample were measured under the excitation by Laser (266 nm), X-ray and proton sources. The obtained results were compared with the CaMoO4bulk crystal and sintered powder obtained from the solid state reaction.