| Texto completo | |
| Autor(es): |
Fidelis, Michel Z.
;
Lazzaroto, Paulo H.
;
Motheo, Artur J.
;
Brackmann, Rodrigo
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICA B-CONDENSED MATTER; v. 716, p. 10-pg., 2025-11-01. |
| Resumo | |
Magnetic CuFe2O4/TiO2 heterojunctions with varying mass ratios were synthesized via the polymeric precursor method and applied to the photocatalytic degradation of Reactive Yellow BF-4G under UV irradiation. Structural characterization confirmed the coexistence of CuFe2O4, alpha-Fe2O3, CuO, and TiO2 polymorphs (anatase and rutile). The introduction of CuFe2O4 promoted anatase stabilization and significantly reduced the crystallite size of TiO2, as evidenced by XRD, Rietveld refinement, and SEM analyses. Among the tested materials, the F2T1 sample (66.7 % CuFe2O4 and 33.3 % TiO2) exhibited the highest photocatalytic activity, achieving complete dye removal within 45 min. Kinetic analysis showed pseudo-first-order behavior, and scavenger experiments identified hydroxyl radicals (center dot OH) as the main reactive species. The F2T1 catalyst also demonstrated excellent stability over five reuse cycles, with magnetic recovery ensuring practical applicability. These results highlight the effectiveness of CuFe2O4/TiO2 composites as multifunctional photocatalysts for wastewater treatment, combining enhanced activity, structural synergy, and recyclability. (AU) | |
| Processo FAPESP: | 24/12716-5 - Combinação de técnicas e processos para a remoção/degradação de contaminantes de preocupação emergente de meios aquosos na presença de interferentes |
| Beneficiário: | Michel Zampieri Fidelis |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 22/12895-1 - Processos avançados para a degradação de poluentes emergentes: materiais catalíticos, sensores eletroanalíticos e divulgação científica |
| Beneficiário: | Marcos Roberto de Vasconcelos Lanza |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |