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Ucker, Catia Liane ; Cantoneiro, Renato de Gouveia ; Almeida, Suelen Rodrigues ; Fabra, Giovanni Mikael Noguera ; Brum, Darwin de Oliveira ; De Foggi, Camila Cristina ; Teodoro, Marcio Daldin ; Morisso, Fernando Dal Pont ; Mastelaro, Valmor Roberto ; Raubach, Cristiane Wienke ; Cava, Sergio da Silva ; Ferrer, Mateus Meneghetti

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 51, n. 24, p. 11-pg., 2025-09-16.

Resumo

Zn doped Niobium oxide (Nb2O5) prepared by microwave-assisted hydrothermal synthesis was applied to Rhodamine B degradation and, for the first time, to antimicrobial applications. The influence of Zn incorporation in the structure was evaluated using various characterization techniques, including X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, photoluminescence (PL), and UV-visible spectroscopy. All samples exhibited low crystallinity of the pseudo-hexagonal phase due to the temperature used in the material synthesis. The results revealed that increasing the zinc content enhances the number of surface pores and that, up to 1.5 % zinc, reduces the bandgap value. Samples with up to 1.5 % zinc insertion demonstrated improved Rhodamine B dye decolorization efficiency, achieving 100 % decolorization efficiency within 120 min. However, higher zinc concentrations resulted in decreased RhB decolorization performance. Reusability tests confirmed the excellent stability of the samples. Furthermore, the 0.5-ZnNb and 1-ZnNb samples showed strong antimicrobial activity against different microorganisms. This study promotes the development of more sustainable and environmentally responsible processes by synthesizing Nb2O5 with different zinc proportions. The resulting material is applied in both the degradation of organic pollutants and the microbial disinfection of wastewater. The adopted methodology aims to optimize photocatalytic antimicrobial efficiency, providing an effective and eco-friendly solution for effluent treatment, contributing to a cleaner and safer approach to contaminated water management. (AU)

• Processo FAPESP: 22/10340-2 - EMU científico: aquisição de um sistema de fluorescência de alta resolução temporal, espacial, espectral e operando em amplo intervalo de temperatura
• Beneficiário: Gilmar Eugenio Marques
• Modalidade de apoio: Auxílio à Pesquisa - Programa Infraestrutura - Científico
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs