Synthesis, Luminescence and Optical Properties of a CaMoO4 Nano-Powder Prepared by Using the Precipitation Method
| Autor: | Daehoon Ha, Hongjoo Kim, Pabitra Aryal, Indra Raj Pandey, Hyang Kyu Park, Sujita Karki |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Absorption spectroscopy Precipitation (chemistry) Band gap Analytical chemistry General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Transmission electron microscopy 0103 physical sciences X-ray crystallography Nano Particle 0210 nano-technology Luminescence |
| Zdroj: | Journal of the Korean Physical Society. 75:534-540 |
| ISSN: | 1976-8524 0374-4884 |
| Popis: | Nano powders of CaMoO4 were 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 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. |
| Databáze: | OpenAIRE |
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