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Volume 1, Issue 1
  • ISSN: 2666-7312
  • E-ISSN: 2666-7339

Abstract

Recently, the CaMoO nanocrystal has been viewed as one of the most promising substrates for rare-earth-doped nanophosphors due to its high density, stable chemical properties, and good Deep-Ultraviolet (DUV) responding characteristics.

In this work, a green synthesis approach is proposed to obtain rare-earth-doped CaMoO nanodispersion with full-visible-spectra emission by using an ethanol-water mixed solvent in a Rotating Packed Bed (RPB) reactor.

The obtained nanophosphors exhibited bright luminescent emission with tunable color in the range of full-visible-spectra doping of Eu3+, Tb3+, and Dy3+, when they were excited by deep-ultraviolet (DUV) light. The RPB promoted the uniform distribution of rare-earth ions and the crystallinity of CaMoO particles, and the use of ethanol-water as solvents with no toxicity and less environmental pollution was beneficial for large-scale production.

The quantum yields for nanophosphors of CaMoO: Na+, Eu3+, CaMoO: Na+, Tb3+, and CaMoO: Na+, Dy3+ were measured to be 46.96%, 28.05%, and 10.27%, respectively, which were among the highest values ever reported for rare-earth-doped CaMoO-based nanophosphors with similar morphology. The temperature-dependent luminescence of CaMoO: Eu3+, Na+ nanophosphors was investigated in the range of 298 K - 498 K.

The clear correlation between luminescence intensity and temperature indicates the potential novel application areas for CaMoO: Na+, Eu3+ nanophosphor as a non-invasive thermometer. Upon regulating different nanophosphor material ratios, the obtained product shows a flexible fluorescence towards full-visible-spectra emission.

© 2022 Bentham Science Publishers
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/content/journals/cam/10.2174/2666731201666220128110046
2022-04-01
2024-11-26

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/content/journals/cam/10.2174/2666731201666220128110046
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Green Synthesis of Deep Ultraviolet Response Nanophosphors with Tunable Full-visible-spectra Emission for Luminescent Temperature Sensing
Curr. Appl. Mat. 1, e280122200640 (2022); https://doi.org/10.2174/2666731201666220128110046
/content/journals/cam/10.2174/2666731201666220128110046
/content/journals/cam/10.2174/2666731201666220128110046
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  • Article Type:     Research Article
Keyword(s): full-visible-spectra emission; green solvent; nanodispersion; process intensification; Rotating packed bed; temperature sensing

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