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Synthesis, Luminescence and Optical Properties of a CaMoO4 Nano-Powder Prepared by Using the Precipitation Method
- Authors
- Karki, Sujita; Aryal, Pabitra; Ha, Daehoon; Kim, Hong Joo; Park, Hyang Kyu; Pandey, Indra Raj
- Issue Date
- 10월-2019
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Nano-powder; Precipitation method; X-ray diffraction; Transmittance electron microscopy; Fluorescence decay time
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.75, no.7, pp.534 - 540
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 75
- Number
- 7
- Start Page
- 534
- End Page
- 540
- ISSN
- 0374-4884
- Abstract
- Nano powders of CaMoO4 were synthesized by using the precipitation method, and the obtained powders were dried inside a vacuum oven at 120 degrees C. The phases of powders were analyzed by using X-ray diffraction (XRD), which revealed that CaMoO4 was 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 CaMoO4 bulk crystal and sintered powder obtained from the solid state reaction.
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Collections - Graduate School > Department of Accelerator Science > 1. Journal Articles
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