The pH-dependent reactions in the sonochemical synthesis of luminescent fluorides: The quest for the formation of KY3F10 crystal phases

Kinetics or thermodynamics? Extolling their role to modulate the crystal phases and luminescence of KY3F10:Eu3+ powders

“…More intriguing is the fact that this morphology is the same that has been possible to obtain under the aforementioned process of synthesis mediated by sonochemistry. 22…”

“…More intriguing is the fact that this morphology is the same that has been possible to obtain under the aforementioned process of synthesis mediated by sonochemistry. 22 Hence, the evolution of the polymorphs is governed by kinetic and/or thermodynamic control, also reflected in the evolution of the morphology of particles. As a schematic representation, Fig.…”

“…20,21 In a recent article, we employed a sonochemical synthesis to obtain both the α and δ compounds by accurately adjusting the pH of the reaction medium. 22 The complex formation mechanism of the δ-phase was discussed in detail employing equilibrium reactions. Inspired by this peculiar and delicate system, we published another study in which a novel and easy coprecipitation method was developed to obtain nanospheres of the δ-phase at room temperature.…”

Fluorination of Eu-doped layered yttrium hydroxides: the role of anionic composition

“…can be applied in photoluminescence, photocatalysis, optoelectronics, gas sensors, supercapacitors, electrocatalysts for water splitting, oxidation catalysis, and ion batteries [1]. Rare-earth hydroxyfluorides are promising for the preparation of luminescent materials with high refractive index and low phonon energy [2][3][4]. The structure of metal hydroxyfluorides can be regarded as the structure of fluorine-substituted hydroxides or hydroxyl-substituted metal fluorides.…”

A Site-Selective Fluorescence Spectroscopy Study of the Crystal Phases of Ky3f10: Leveraging the Optical Response of Eu3+ Ions

“…This approach yielded truncated triangular nanoplates that were also doped with Eu 3+ as a first attempt to analyze their luminescent response. Additionally, another complementary study conducted by our laboratory has been published in which the complex formation mechanism of the δ-phase is discussed in detail [16]. The nanoplate-type morphology can be well appropriated for some particular applications, although when it comes to surface engineering and further modifications (such as designing Ln 3+ -doped core-shell structures), it is of interest to have materials preferably with a spherical morphology.…”