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Effects of Ag+ ion doping on UV radiation absorption and luminescence profiles of fluorapatite nanomaterials obtained by neutralization method

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2019
Effects_of_Ag+_pub_2019.pdf (1.082Mb)
Authors
Milojkov, Dušan
Stanić, Vojislav
Dimović, Slavko
Mutavdžić, Dragosav
Živković-Radovanović, Vukosava
Janjić, Goran
Radotić, Ksenija
Article (Published version)
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Abstract
In the present study we have analyzed effects of Ag+ ions doping on energetic profiles of nanophosphors materials based on fluorapatite crystal system. The UV radiation absorption and luminescence properties of monophase fluorapatite (FAP) and Ag+ doped fluorapatite (AgFAP) nanomaterials obtained by neutralization method were investigated using the photoluminescence spectrophotometry. The excitation-emission profiles of nanomaterials were analyzed statistically by MCR-ALS method and number of fluorophores was extracted. FAP lattice absorbed light at 350 nm in the UVA part of spectrum, and with increasing concentration of Ag+ ions new absorption maximum appeared at 270 nm in the UVC part. Fluorescence of FAP nanoparticles was in violet region of visible part of the spectrum, with a red shift to the green region when Ag+ was doped in lattice. MCR-ALS analyses of fluorescence spectra confirm formation of two maxima, at 484 and 505 nm, as a consequence of Ag+ ions doping in FAP lattice at ...Ca1 (4f) sites. The results of quantum chemical calculations showed that an Ag+ ion is stronger bonded to the binding site 1 (-1352:6 kcal/mol) than to the binding site 2 (-1249:0 kcal/mol). Considering that AgFAP1 nanopowder absorbs photons over all part of UV radiation spectrum, this material might be used as potential radiation protective nanomaterial.

Keywords:
DFT / Fluorescence / Silver doped fluorapatite / UV radiation
Source:
Acta Physica Polonica A, 2019, 136, 1, 86-91
Publisher:
  • Polish Academy of Sciences
Projects:
  • Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden (RS-43009)
  • Study of structure-function relationships in the plant cell wall and modifications of the wall structure by enzyme engineering (RS-173017)

DOI: 10.12693/APhysPolA.136.86

ISSN: 0587-4246

WoS: 000495444100013

Scopus: 2-s2.0-85074542549
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3254
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