A facile synthesis of CaF2:Eu2+ nanoparticles using citrate-stabilized Au catalysts
Source abstract
Abstract
Abstract Europium doped calcium fluoride (CaF 2 :Eu 2+ ) nanoparticles have been synthesized by hydrothermal method in which NaBH 4 is added as reductant and citrate-stabilized gold (Cit-Au) nanoparticles are used as catalyst. The microstructure of CaF 2 :Eu 2+ is investigated by X-ray power diffraction (XRD), energy dispersion spectrum (EDS), and selected area electron diffraction (SAED). Field emission scanning electron microscope (FESEM) and transmission electron microscopy (TEM) have shown that the CaF 2 :Eu 2+ nanoparticles are about 60 nm. Lattice fringes observed in high-resolution TEM further displayed high crystallinity of the CaF 2 :Eu 2+ nanoparticles and Cit-Au NPs. An intensive and broad emission peaked at 425 nm due to 4f 7 – 4f 6 5d 1 transition of Eu 2+ ions is observed. The 4f 7 ( 8 S 7/2 ) → 4f 6 5d 1 (t 2g )optical transitions exhibit a characteristic “staircase’’ spectrum from 330 nm to 380 nm. The effect of gold concentrations on emission of CaF 2 :Eu 2+ has also been investigated.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Inorganic Fluorides and Related Compounds · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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