https://doi.org/10.1140/epjp/s13360-023-04849-7
Regular Article
Influence of P2O5 addition on glass structure and luminescent properties of Eu3+ ions in SiO2–CaO particles of bioactive glass
1
Department of Mechanics, Materials and Biomedical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370, Wroclaw, Poland
2
Institute of Low Temperature and Structure Research, PAS, ul. Okolna 2, 50-422, Wroclaw, Poland
a
Beata.Borak@pwr.edu.pl
d
A.Lukowiak@intibs.pl
Received:
7
November
2023
Accepted:
26
December
2023
Published online:
17
January
2024
Phosphorous compounds are essential for living organisms, specifically as building blocks for hard tissues such as bones. Therefore, it is an important (although not necessary) component of bioactive glass used in regenerative medicine. Hereby, the influence of 
on the properties of silica–calcia glass was studied. Europium(III) ions, as a luminescent probe, have been incorporated into bioactive glass hosts of both binary (SiO2–CaO) and ternary (SiO2–CaO–P2O5) systems obtained via sol–gel technique. The fabricated glasses consisted of spherical particles with an average diameter close to 100 nm. The energy dispersive X-ray analysis confirmed the presence of silicon, calcium, phosphorous, and europium ions, although with different ratios than assumed during the synthesis process. The lower amount of calcium oxide was detected mainly in the silica–calcia composition (16 wt.% instead of 35 wt.%). The presence of phosphate groups in the glass allowed for the maintenance of a higher CaO concentration (23 wt.%), but partial crystallization of the material occurred, which was not observed in the binary system. Investigation of the photoluminescent properties showed that Eu3+ emission had higher intensity and longer decay times when samples were annealed at higher temperatures (the tested temperature range was 600–800 °C), indicating reduced hydroxyl quenching. The addition of phosphate groups resulted in shorter luminescence lifetimes in comparison to the SiO2–CaO samples due to the modified environment of europium ions caused by partial crystallization.
A correction to this article is available online at https://doi.org/10.1140/epjp/s13360-024-05192-1.
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