Enhanced photoluminescence and photocatalytic properties in Dy-doped sodium zinc molybdate synthesized via a green microwave-assisted method†
Abstract
This study focuses on the structural, photoluminescence and photocatalytic properties of a Dy3+-doped sodium zinc molybdate phosphor. The samples were synthesized using a green microwave-assisted method owing to its efficiency in time and energy consumption. The powder X-ray diffraction (P-XRD) analysis confirmed the monoclinic structure of as-synthesized Dy3+-doped sodium zinc molybdate with space group C2/m. The most prominent excitation band appeared at 348 nm under 590 nm, and the emission spectra for all samples exhibited a sharp peak at around 590 nm, which is attributed to the 4F9/2 → 6H13/2 electric dipole transition of Dy3+ ions. The emission intensity increases with higher Dy3+ doping levels, reaching maximum intensity at a concentration of 6 mol% of Dy3+ in sodium zinc molybdate. Additionally, the Commission Internationale de l'Éclairage (CIE) chromaticity coordinates of the Dy3+ sodium zinc molybdate phosphor places it within the orangish region. Dy3+ is also found to play a great role in enhancing the photocatalytic activity of sodium zinc molybdate under UV light. These findings indicate that the as-synthesized phosphor holds promise for white LED and water purification applications.
- This article is part of the themed collection: Advances in nanophotonics, plasmonic, and nano-optics
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