Banica Radu

Dima George-Daniel

Dramićanin Miroslav

Mosoarca Cristina

Racu Andrei

English

University of Szeged

29th International Symposium on Analytical and Environmental Problems  131  SYNTEHIS AND CHARACTERIZATION OF Pr3+ DOPED YTTRIUM SILICATE VIA SOL-GEL METHOD  George-Daniel Dima1,2, Radu Bănică1, Andrei Racu1, Miroslav D. Dramićanin1, Cristina Mosoarca1  1Renewable Energies – Photovoltaics Laboratory – National Institute of Research and Development for Electrochemistry and Condensed Matter, 300569 Timișoara, Dr. A. Păunescu Podeanu, Str., 144, România 2University Politehnica Timisoara, Faculty of Industrial Chemistry and Environmental Engineering, 6 Pârvan, 300223 Timisoara, Romania e-mail: george.dima@student.upt.ro, m.crristina@gmail.com  Abstract Y2SiO5:Pr3+ is a widely recognized optical material that is utilized for the conversion of visible blue light into ultraviolet-C radiation (UV-C), thus producing conceivable antibacterial effects [1]. The silicate in question exhibits two distinct allotropic forms. The first form is observed at lower calcination temperatures and exhibits a monoclinic crystal structure with space group P21/c (X1). The second form, on the other hand, is observed at higher temperatures and possesses the space group I*/a (X2) [2]. Nevertheless, the literature often fails to adequately address the significance of ensuring the homogeneity of the reaction precursor while synthesizing these silicates. The diffusion coefficient of ions in SiO2 and Y2O3 is influenced by temperature, as indicated by their high melting temperatures. This temperature dependence is observed even at a temperature of 1000°C [3].  The objective of this study is to synthesize Pr3+-doped yttrium silicate using two distinct methodologies. The initial approach involved the utilization of pre-synthesized oxide precursors, while the subsequent method capitalized on co-precipitated oxides. Subsequently, the samples underwent calcination processes at temperatures of 1350 °C and 1050 °C, respectively, as per the aforementioned methods. In the initial scenario, the discrepant velocities observed in the hydrolysis and condensation reactions of tetraethyl orthosilicate, as well as the precipitation of Y3+, no longer exert an impact on the uniformity of the precursor substances. The aforementioned approaches offer a precise means of controlling the composition and uniformity of the synthesized products, rendering them a favorable option for the advancement of superior materials. The produced materials were subjected to analysis using X-ray diffraction (XRD), photoluminescence spectroscopy, and first antimicrobial assays.  Acknowledgements This study was supported by Romania’s National Recovery and Resilience Plan, NRRP, project C9-I8-28/ FC 760107/2023.  References [1] F. Lai, X. Xu, J. Shen, et al., Silicon, 15 (2023) 1913–1923.  [2] N. Verma, J. Kaur, V. Dubey, N. Dubey, T. Ram, Inorg. Chem. Commun., 147 (2023), 110234.  [3] A. Dwivedi,  Anuradha, M. Srivastava, A. Srivastava, R. Kumar, S. Kumar Srivastava, Spectrochim. Acta A Mol. Biomol., 299 (2023) 122782.    

Synthesis and characterization of Pr3+ doped yttrium silicate via sol-gel method : [abstract]

http://acta.bibl.u-szeged.hu/82390/1/proceedings_of_isaep_2023_131.pdf

Synthesis and characterization of Pr3+ doped yttrium silicate via sol-gel method : [abstract]

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