Nitrate (chloride) melts as media for crystal growth of complex phosphates of alkali and trivalent metals

Livitska, Oksana; Strutynska, Nataliya Yu.; Zatovsky, Іgor V.; Slobodyanik, Nikolay S.; Odinets, Eugen

doi:10.1016/j.jcrysgro.2015.10.023

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…The first one includes flux growth from M I 3 PO 4 , M I 4 P 2 O 7 , or M I F molten salts providing single crystals and the second one is ceramic sintering, which is more convenient for powdered solid solution synthesis. One of the advantages of flux application is lowering crystallization temperatures and enhancing crystal quality, but it requires knowledge of appropriate molar ratios. Importantly, for double phosphate crystal growth, highly alkaline molten salts with alkaline metal to phosphate M I /P ratio are used.…”

Section: Resultsmentioning

confidence: 99%

“…The most common route of binary phosphate preparation is the solid‐state technique, although it is followed by the presence of LnPO 4 admixture . On the contrary, molten salt synthesis has shown limited application due to high volatility and thermohydrolysis of molten component alkali metal halides or high melting point in the case of K 4 P 2 O 7 . Another disadvantage of the molten phosphate approach is additional investigation of optimal ratios required for successful growth of the target compound.…”

Section: Introductionmentioning

confidence: 99%

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Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K₃La(PO₄)₂

Тerebilenko

Kyselov

Baumer

et al. 2018

Crystal Research and Technology

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Single crystals of potassium lanthanum orthophosphate are prepared from high‐temperature melts containing potassium molybdate as a flux and structurally investigated by single‐crystal X‐ray diffraction. The framework is shown to be constructed from isolated LaO7 monocapped prisms and PO4 tetrahedra through corner‐ and edge‐sharing giving rise to 2D sheets with composition [La(PO4)2]3−. Three types of potassium cations reside between these layers. For the solid solutions K3La1−xEux(PO4)2 (x = 0.1–0.9) prepared by the solid‐state route, the excitation and emission luminescence spectra are studied at room temperature. The emission spectra exhibit strong reddish performance, which is due to the 5D0→7FJ transitions of Eu3+ ions. The correlation between the structure and the photoluminescent properties of the phosphors is studied. The energy transfer and concentration quenching of the phosphors are discussed. Solid solutions K3La1−xEux(PO4)2 have a potential application for white‐light‐emitting diodes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K₃La(PO₄)₂

Тerebilenko

Kyselov

Baumer

et al. 2018

Crystal Research and Technology

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“…Most phosphate‐based phosphors reported were synthesized by solid‐state reaction, which requires an elevated temperature and the interaction between initial components takes place very slowly . Thus, searching for new strategy for the synthesis of phosphate‐based phosphors with desired morphology remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

Molten‐Salt‐Assisted Synthesis of Na₃Bi(PO₄)₂:Eu³⁺ Nanoparticles with Strong Red Emission

Boyi

Yao

Liu

2019

Physica Status Solidi (a)

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Single phase Eu 3þ -doped Na 3 Bi(PO 4 ) 2 (NBPO) nanoparticles with different Eu 3þ concentrations are successfully synthesized by a molten-salten method using Na 3 PO 4 Á 12H 2 O both as reaction medium and as reactant. The influence of synthesis conditions such as the Na 3 PO 4 Á 12H 2 O content, heating temperature, and time on the crystal structure of the final products is investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It reveals that pure phase Na 3 Bi(PO 4 ) 2 nanoparticles with size about 100 nm are successfully achieved when the mixture (molar ratio of 1:4 between Bi(NO 3 ) 3 Á 5H 2 O and Na 3 PO 4 Á 12H 2 O) is heated at 180 C for 12 h. After Eu 3þ -doping, NBPO:Eu 3þ nanoparticles exhibit bright red emission peaking at 620 nm under the excitation of the near ultraviolet (NUV) light. The luminescence is attributed to the electric dipole transition 5 D 0 ! 7 F 2 of Eu 3þ ions. The luminescent intensity of the NBPO:Eu 3þ phosphors is strongly dependent on the Eu 3þ content and concentration quenching occurred when the Eu 3þ concentration is larger than 8 mol%, which is attributed to dipole-dipole interaction. This work provides a green way for the synthesis of phosphate-based nanomaterials and suggests that Eu 3þdoped Na 3 Bi(PO 4 ) 2 has a great potential application in the lighting and display fields.

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Low-temperature molten salt process for the synthesis of NaBi7P2O16 nano-plates with excellent photocatalytic activity

et al. 2018

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Nitrate (chloride) melts as media for crystal growth of complex phosphates of alkali and trivalent metals

Cited by 4 publications

References 19 publications

Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K₃La(PO₄)₂

Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K₃La(PO₄)₂

Molten‐Salt‐Assisted Synthesis of Na₃Bi(PO₄)₂:Eu³⁺ Nanoparticles with Strong Red Emission

Low-temperature molten salt process for the synthesis of NaBi7P2O16 nano-plates with excellent photocatalytic activity

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Nitrate (chloride) melts as media for crystal growth of complex phosphates of alkali and trivalent metals

Cited by 4 publications

References 19 publications

Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K3La(PO4)2

Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K3La(PO4)2

Molten‐Salt‐Assisted Synthesis of Na3Bi(PO4)2:Eu3+ Nanoparticles with Strong Red Emission

Low-temperature molten salt process for the synthesis of NaBi7P2O16 nano-plates with excellent photocatalytic activity

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Product

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Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K₃La(PO₄)₂

Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K₃La(PO₄)₂

Molten‐Salt‐Assisted Synthesis of Na₃Bi(PO₄)₂:Eu³⁺ Nanoparticles with Strong Red Emission