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Lemański K, Bezkrovna O, Rebrova N, Lisiecki R, Zdeb P, Dereń PJ. UVC Stokes and Anti-Stokes Emission of Ca 9Y(PO 4) 7 Polycrystals Doped with Pr 3+ Ions. Molecules 2024; 29:2084. [PMID: 38731575 PMCID: PMC11085382 DOI: 10.3390/molecules29092084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/02/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
The recent COVID-19 pandemic has made everyone aware of the threat of viruses and the growing number of antibiotic-resistant bacteria. It has become necessary to find new methods to combat these hazards. One tool that could be used is UVC radiation, i.e., 100-280 nm. Currently, the available sources of this light are mercury vapor lamps. However, the modern world requires more compact, mercury-free, and less energy-consuming light sources. This work presents the results of our research on a new material in which efficient UVC radiation was obtained. Here, we present the results of research on Ca9Y(PO4)7 polycrystals doped with Pr3+ ions prepared using the solid-state method. The absorption, excitation, emission, and emission decay profiles of praseodymium(III) ions were measured and analyzed. The upconversion emission in the UVC region excited by blue light was observed. Parameters such as energy bandgap, refractive index, and thermal stability of luminescence were determined. The studied phosphate-based phosphor possesses promising characteristics that show its potential in luminescent applications in future use in medicine or for surface disinfection.
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Affiliation(s)
- Karol Lemański
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wrocław, Poland (N.R.); (R.L.); (P.Z.)
| | - Olha Bezkrovna
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wrocław, Poland (N.R.); (R.L.); (P.Z.)
- Institute for Single Crystals, NAS of Ukraine, Nauky Ave. 60, 61001 Kharkiv, Ukraine
| | - Nadiia Rebrova
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wrocław, Poland (N.R.); (R.L.); (P.Z.)
| | - Radosław Lisiecki
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wrocław, Poland (N.R.); (R.L.); (P.Z.)
| | - Patrycja Zdeb
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wrocław, Poland (N.R.); (R.L.); (P.Z.)
| | - Przemysław Jacek Dereń
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422 Wrocław, Poland (N.R.); (R.L.); (P.Z.)
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Ruan W, Xie M, Yang Q, Hu L, Su K. Preparation and properties of Eu 2+/Eu 3+ co-activated Ca 9Lu(PO 4) 7 phosphors for multichannel photoluminescence. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01359b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multichannel photoluminescence control from cyan-to-white-to-red across the white region was achieved by single-phase Ca9Lu(PO4)7:Eu2+,Eu3+ phosphors and Eu2+ → Eu3+ energy transfer.
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Affiliation(s)
- Wenke Ruan
- School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China
| | - Mubiao Xie
- School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China
| | - Qiaoli Yang
- School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China
| | - Limin Hu
- School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China
| | - Kangsheng Su
- School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China
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Neutron and XRD Single-Crystal Diffraction Study and Vibrational Properties of Whitlockite, the Natural Counterpart of Synthetic Tricalcium Phosphate. CRYSTALS 2021. [DOI: 10.3390/cryst11030225] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A crystal chemical investigation of a natural specimen of whitlockite, ideally Ca9Mg(PO4)6[PO3(OH)], from Palermo Mine (USA), was achieved by means of a combination of electron microprobe analysis (EMPA) in WDS mode, single-crystal neutron diffraction probe (NDP) and single-crystal X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The crystal-chemical characterization resulted in the empirical formula (Ca8.682Na0.274Sr0.045)Σ9.000(Ca0.034□0.996)Σ1.000(Mg0.533Fe2+0.342Mn2+0.062Al0.046)Σ0.983(P1.006O4)6[PO3(OH0.968F0.032)Σ1.000]. Crystal-structure refinement, in the space group R3c, converged to R1 = 7.12% using 3273 unique reflections from NDP data and to R1 = 2.43% using 2687 unique reflections from XRD data. Unit cell parameters from NDP are a = 10.357(3) Å, c = 37.095(15) Å and V = 3446(2) Å3, and from XRD, the parameters are a = 10.3685(4) Å, c = 37.1444(13) Å and V = 3458.2(3) Å3. NDP results allowed a deeper definition of the hydrogen-bond system and its relation with the structural unit [PO3(OH)]. The FTIR spectrum is very similar to that of synthetic tricalcium phosphate Ca3(PO4)2 and displays minor band shifts due to slightly different P-O bond lengths and to the presence of additional elements in the structure. A comparison between whitlockite, isotypic phases from the largest merrillite group, and its synthetic counterpart Ca3(PO4)2 is provided, based on the XRD/NDP and FTIR results.
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New Ca2.90(Me2+)0.10(PO4)2 β-tricalcium Phosphates with Me2+ = Mn, Ni, Cu: Synthesis, Crystal-Chemistry, and Luminescence Properties. CRYSTALS 2019. [DOI: 10.3390/cryst9060288] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
C a 2.90 M e 0.10 2 + ( P O 4 ) 2 (with Me = Mn, Ni, Cu) β-tricalcium phosphate (TCP) powders were synthesized by solid-state reaction at T = 1200 °C and investigated by means of a combination of scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) spectroscopy, and luminescence spectroscopy. SEM morphological analysis showed the run products to consist of sub spherical microcrystalline aggregates, while EDS semi-quantitative analysis confirmed the nominal Ca/Me composition. The unit cell and the space group were determined by X-ray powder diffraction data showing that all the compounds crystallize in the rhombohedral R3c whitlockite-type structure, with the following unit cell constants: a = b = 10.41014(19) Å, c = 37.2984(13) Å, and cell volume V = 3500.53(15) Å3 (Mn); a = b = 10.39447(10) Å, c = 37.2901(8) Å; V = 3489.22(9) Å3 (Ni); a = b = 10.40764(8) Å, c = 37.3158(6) Å, V = 3500.48(7) Å3 (Cu). The investigation was completed with the structural refinement by the Rietveld method. The FTIR spectra are similar to those of the end-member Ca β-tricalcium phosphate (TCP), in agreement with the structure determination, and show minor band shifts of the (PO4) modes with the increasing size of the replacing Me2+ cation. Luminescence spectra and decay curves revealed significant luminescence properties for Mn and Cu phases.
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Kosyl KM, Paszkowicz W, Ermakova O, Wlodarczyk D, Andrzej Suchocki, Minikayev R, Domagala JZ, Shekhovtsov AN, Kosmyna M, Popescu C, Fauth F. Equation of State and Amorphization of Ca 9R(VO 4) 7 (R = La, Nd, Gd): A Combined High-Pressure X-ray Diffraction and Raman Spectroscopy Study. Inorg Chem 2018; 57:13115-13127. [PMID: 30351065 DOI: 10.1021/acs.inorgchem.8b01182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ca9R(VO4)7 (R = rare earth) multicomponent oxides of a whitlockite-related structure are under consideration for applications in optoelectronics. In this work, the Czochralski-grown Ca9R(VO4)7 crystals were investigated as a function of pressure by powder X-ray diffraction and single-crystal Raman spectroscopy. The diffraction experiments were performed at the ALBA synchrotron under pressures ranging up to 9.22(5), 10.7(1), and 8.55(5) GPa for R = La, Nd, and Gd, respectively, to determine the third order equation of state (EOS) parameters. Fitting of the Birch-Murnaghan EOS provided the isothermal bulk moduli K0 = 63(4), 63(2), and 61(5) GPa for these three orthovanadates. These values are apparently lower than that reported for structurally related tricalcium vanadate Ca3(VO4)2. The compressibility anisotropy was observed; the lattice is markedly stiffer in [001] than in [100] direction. For Ca9Nd(VO4)7, the variation of the diffractograms just above 10 GPa provides an indication on the beginning of amorphization process; during pressure release the whitlockite-like structure is recovered. Raman spectroscopy measurements for single crystals of the above-mentioned rare-earth vanadates and Ca9Y(VO4)7 were performed (the maximum pressures achieved were 16.3(1), 21.2(1), 15.3(1), and 18.6(1) GPa for R = Y, La, Nd, and Gd, respectively). These measurements reveal a partially reversible phase transition interpreted as amorphization, with an onset at the pressure of ∼9-10 GPa, characterized by broadening of the peaks and their shift to lower energies.
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Affiliation(s)
- Katarzyna M Kosyl
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland
| | - Wojciech Paszkowicz
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland
| | - Olga Ermakova
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland
| | - Damian Wlodarczyk
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland
| | - Andrzej Suchocki
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland.,Institute of Physics , Kazimierz Wielki University , Weyssenhoffa 11 , 85-072 Bydgoszcz , Poland
| | - Roman Minikayev
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland
| | - Jaroslaw Z Domagala
- Institute of Physics , Polish Academy of Sciences , Aleja Lotników 32/46 , 02-668 Warsaw , Poland
| | - Alexei N Shekhovtsov
- Institute for Single Crystals , NAS of Ukraine , Nauky Avenue 60 , 61001 Kharkov , Ukraine
| | - Miron Kosmyna
- Institute for Single Crystals , NAS of Ukraine , Nauky Avenue 60 , 61001 Kharkov , Ukraine
| | - Catalin Popescu
- CELLS-ALBA Synchrotron Light Facility , 08290 Cerdanyola , Barcelona , Spain
| | - François Fauth
- CELLS-ALBA Synchrotron Light Facility , 08290 Cerdanyola , Barcelona , Spain
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Capitelli F, Rossi M, ElKhouri A, Elaatmani M, Corriero N, Sodo A, Della Ventura G. Synthesis, structural model and vibrational spectroscopy of lutetium tricalcium phosphate Ca9Lu(PO4)7. J RARE EARTH 2018. [DOI: 10.1016/j.jre.2018.02.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Górecka N, Szczodrowski K, Lazarowska A, Barzowska J, Michalik D, Grinberg M. The influence of charge compensation defects on the spectroscopic properties of europium doped Ca 9Y(PO 4) 7. RSC Adv 2017. [DOI: 10.1039/c7ra06869g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, a series of Ca9Y(PO4)7 compounds doped with 5% of Eu ions and with different [Y]/[Ca] ratios was synthesized using the Pechini method.
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Affiliation(s)
- N. Górecka
- Institute of Experimental Physics
- Faculty of Mathematic, Physics and Informatics
- Gdańsk University
- Gdańsk
- Poland
| | - K. Szczodrowski
- Institute of Experimental Physics
- Faculty of Mathematic, Physics and Informatics
- Gdańsk University
- Gdańsk
- Poland
| | - A. Lazarowska
- Institute of Experimental Physics
- Faculty of Mathematic, Physics and Informatics
- Gdańsk University
- Gdańsk
- Poland
| | - J. Barzowska
- Institute of Experimental Physics
- Faculty of Mathematic, Physics and Informatics
- Gdańsk University
- Gdańsk
- Poland
| | - D. Michalik
- Silesian University of Technology
- Department of Materials Science
- 40-019 Katowice
- Poland
| | - M. Grinberg
- Institute of Experimental Physics
- Faculty of Mathematic, Physics and Informatics
- Gdańsk University
- Gdańsk
- Poland
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