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Synthesis, Luminescence and Optical Properties of a CaMoO4 Nano-Powder Prepared by Using the Precipitation Method

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Abstract

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.

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Acknowledgments

This investigation has been supported by IBS-R016-D1 and the National Research Foundation of Korea (NRF) funded by the Korean Government Ministry of Education Science and Technology (MEST) (No. 2015R1 A2A1A13001843). We also thank to the user supporting team of the Proton Engineering Frontier Project.

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Authors and Affiliations

  1. Department of Physics, Kyungpook National University, Daegu, 41566, Korea

    Sujita Karki, Pabitra Aryal, Daehoon Ha & Hong Joo Kim

  2. Department of Accelerator Science, Graduate School, Korea University, Sejong, 30019, Korea

    Hyang Kyu Park

  3. Center for Underground Physics, Institute for Basic Science (IBS), Daejeon, 34126, Korea

    Indra Raj Pandey

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  1. Sujita Karki
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  2. Pabitra Aryal
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  3. Daehoon Ha
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  4. Hong Joo Kim
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  5. Hyang Kyu Park
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  6. Indra Raj Pandey
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Correspondence to Hong Joo Kim.

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Karki, S., Aryal, P., Ha, D. et al. Synthesis, Luminescence and Optical Properties of a CaMoO4 Nano-Powder Prepared by Using the Precipitation Method. J. Korean Phys. Soc. 75, 534–540 (2019). https://doi.org/10.3938/jkps.75.534

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  • DOI: https://doi.org/10.3938/jkps.75.534

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