Recycled Rare Earth Ions From E-Waste In Borogermanate Glasses For Magneto-Optical Applications

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Berno, Ana Elisa ; Caixeta, Fabio J. ; Ruzene, Joao Pedro C. ; Feltran, Aline M. ; Albino, Leonardo V. ; Abucafy, Marina P. ; Silva, Otavio de B. ; Rodrigues, Joao Pedro P. ; Ferreira-Neto, Elias P. ; Rosa, Amauri P. A. ; Bevilaqua, Denise ; Nalin, Marcelo ; Ribeiro, Sidney J. L. ; Franco, Douglas F.

• Tipo de documento: Artigo Científico
• Fonte: CHEMISTRY-AN ASIAN JOURNAL; v. N/A, p. 12-pg., 2025-03-18.

Resumo

Magneto-optical borogermanate glasses were developed by incorporating electro-electronic waste recovered from fluorescent lamps. Glasses with a composition of (41GeO(2)-25B(2)O(3)-4Al(2)O(3)-10Na(2)O-20BaO)-x%wst, (x=0, 10, 20, 30, and 50 wt% of waste) were prepared. The final chemical composition was determined, and the glasses were characterized through thermal, structural, morphological, optical, and magneto-optical analyses. The addition of lamp waste to the glass matrix did not induce crystallization and stable glass materials were obtained, as confirmed by thermal analysis. Raman spectroscopy has shown that the addition of different amounts of waste into the vitreous matrix induces structural rearrangements as evidenced by the vibration bands of non-bridging B-O- bonds. Regarding optical properties, the transmittance of the glasses slightly decreased with waste incorporation. Photoluminescence showed electronic transitions attributed to the Tb3+ and Eu3+ ions and non-radiative energy transfer from the host to both Ln3+ ions and between them was observed. Finally, a Verdet constant value of -40.9 rad. T-1 m-1 at 632.8 nm was obtained, highlighting the potential of these sustainable glasses as Faraday rotators. (AU)

• Processo FAPESP: 23/04832-2 - Desenvolvimento de rotadores faraday baseados em vidros óxidos e vitrocerâmicas contendo nanocristais de perovskita para aplicações tecnológicas
• Beneficiário: Douglas Faza Franco
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 24/13104-3 - Desenvolvimento de nanopartículas do tipo core-shell-shell à base de UCNP, ZnO e ZIF-8 acoplados a uma membrana de celulose bacteriana para o combate da resistência microbiana através da fotoativação
• Beneficiário: Marina Paiva Abuçafy
• Modalidade de apoio: Bolsas no Brasil - Programa Fixação de Jovens Doutores