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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
24/03/2022 |
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Data da última atualização: |
24/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
JWSUS, E. T. de; MOREIRA, A. J.; SÁ, M. C.; FRESCHI, G. P. G.; JOYA, M. R.; LI, M. S.; PARIS, E. C. |
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Afiliação: |
ELAINE CRISTINA PARIS, CNPDIA. |
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Título: |
Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Environmental Science and Pollution Research, v. 28, 2021. |
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Páginas: |
69401?69415 |
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DOI: |
https://doi.org/10.1007/s11356-021-15435-8 |
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Idioma: |
Inglês |
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Conteúdo: |
Various photocatalytic nanomaterials for environmental remediation have been promoted due to the pollution caused by different organic pollutants. In this study, Nb2O5 nanofibers were obtained by electrospinning technique, presenting controlled crystallinity and high specific surface area to improve the photoactivity response. The structural characterization indicated Nb2O5 nanofibers with orthorhombic phase formation. The photoluminescence measurements showed different energy levels contributing to the electronic transition events. The nanofibers with a bandgap up to 3.6 eV were applied to photocatalysis of dyes (rhodamine B (RhB) or methylene blue (MB)) and fluoxetine (FLX), listed as an emergent pollutant. In the optimized condition (pH = 9), the RhB and MB photocatalysis was 59% and 93% more efficient than photolysis due to ζ = − 50 mV ± 5 for EtOH_550 sample increased interaction with MB (cationic) compared to RhB unprotonated (pKa = 3.7). Therefore, FLX (pKa = 10.7) was selected due to protonated form at pH = 9 and showed 68% ± 1 adsorption in 30 min for EtOH_550. The FLX photocatalytic degradation under UV light irradiation was up to 17% higher than the photolytic degradation. The formation of hydroxyl radicals in the photocatalytic system (EtOH_550) was proven by the Coumarine probe assay, corroborating with the greater amount of α-[2-(methylamino)ethyl]benzylalcohol (MAEB), a by-product obtained after FLX oxidation. Additionally, the material achieved specific catalytic activity for the different organic compounds (RhB, MB, or FLX). Therefore, Nb2O5 nanofibers were efficient for degrading three different pollutants under UV light, proving a viable alternative for environmental remediation. MenosVarious photocatalytic nanomaterials for environmental remediation have been promoted due to the pollution caused by different organic pollutants. In this study, Nb2O5 nanofibers were obtained by electrospinning technique, presenting controlled crystallinity and high specific surface area to improve the photoactivity response. The structural characterization indicated Nb2O5 nanofibers with orthorhombic phase formation. The photoluminescence measurements showed different energy levels contributing to the electronic transition events. The nanofibers with a bandgap up to 3.6 eV were applied to photocatalysis of dyes (rhodamine B (RhB) or methylene blue (MB)) and fluoxetine (FLX), listed as an emergent pollutant. In the optimized condition (pH = 9), the RhB and MB photocatalysis was 59% and 93% more efficient than photolysis due to ζ = − 50 mV ± 5 for EtOH_550 sample increased interaction with MB (cationic) compared to RhB unprotonated (pKa = 3.7). Therefore, FLX (pKa = 10.7) was selected due to protonated form at pH = 9 and showed 68% ± 1 adsorption in 30 min for EtOH_550. The FLX photocatalytic degradation under UV light irradiation was up to 17% higher than the photolytic degradation. The formation of hydroxyl radicals in the photocatalytic system (EtOH_550) was proven by the Coumarine probe assay, corroborating with the greater amount of α-[2-(methylamino)ethyl]benzylalcohol (MAEB), a by-product obtained after FLX oxidation. Additionally, the material achieved specific catal... Mostrar Tudo |
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Palavras-Chave: |
Ceramic nanofiber; Drug; Electrospinning; Organic pollutant. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02510naa a2200265 a 4500
001 2141289
005 2022-06-24
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11356-021-15435-8$2DOI
100 1 $aJWSUS, E. T. de
245 $aPotential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants.$h[electronic resource]
260 $c2022
300 $a69401?69415
520 $aVarious photocatalytic nanomaterials for environmental remediation have been promoted due to the pollution caused by different organic pollutants. In this study, Nb2O5 nanofibers were obtained by electrospinning technique, presenting controlled crystallinity and high specific surface area to improve the photoactivity response. The structural characterization indicated Nb2O5 nanofibers with orthorhombic phase formation. The photoluminescence measurements showed different energy levels contributing to the electronic transition events. The nanofibers with a bandgap up to 3.6 eV were applied to photocatalysis of dyes (rhodamine B (RhB) or methylene blue (MB)) and fluoxetine (FLX), listed as an emergent pollutant. In the optimized condition (pH = 9), the RhB and MB photocatalysis was 59% and 93% more efficient than photolysis due to ζ = − 50 mV ± 5 for EtOH_550 sample increased interaction with MB (cationic) compared to RhB unprotonated (pKa = 3.7). Therefore, FLX (pKa = 10.7) was selected due to protonated form at pH = 9 and showed 68% ± 1 adsorption in 30 min for EtOH_550. The FLX photocatalytic degradation under UV light irradiation was up to 17% higher than the photolytic degradation. The formation of hydroxyl radicals in the photocatalytic system (EtOH_550) was proven by the Coumarine probe assay, corroborating with the greater amount of α-[2-(methylamino)ethyl]benzylalcohol (MAEB), a by-product obtained after FLX oxidation. Additionally, the material achieved specific catalytic activity for the different organic compounds (RhB, MB, or FLX). Therefore, Nb2O5 nanofibers were efficient for degrading three different pollutants under UV light, proving a viable alternative for environmental remediation.
653 $aCeramic nanofiber
653 $aDrug
653 $aElectrospinning
653 $aOrganic pollutant
700 1 $aMOREIRA, A. J.
700 1 $aSÁ, M. C.
700 1 $aFRESCHI, G. P. G.
700 1 $aJOYA, M. R.
700 1 $aLI, M. S.
700 1 $aPARIS, E. C.
773 $tEnvironmental Science and Pollution Research$gv. 28, 2021.
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| 26. |  | MARTHA JÚNIOR, G. B.; VILELA, L. Uso de fertilizantes em pastagens. In: MARTHA JÚNIOR, G. B.; VILELA, L.; SOUSA, D. M. G. de (Ed.). Cerrado: uso eficiente de corretivos e fertilizantes em pastagens. Planaltina, DF: Embrapa Cerrados, 2007. Cap. 2, p. 43-68.| Tipo: Capítulo em Livro Técnico-Científico | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Cerrados. |
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| 33. | | MARTHA JÚNIOR, G. B.; BARCELLOS, A.; VILELA, L.; SOUSA, D. Benefícios bioeconômicos e ambientais da integração lavoura-pecuária. In: SEMANA AGRONÔMICA DO OESTE BAIANO- SEAGRO, 4., CURSO SOBRE SISTEMA DE INTEGRAÇÃO LAVOURA-PECUÁRIA, 2., 2007, Luís Eduardo Magalhães. Anais... Luís Eduardo Magalhães: Agrolem; Fundação BA, 2007. p. 247-267.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| 34. | | MARTHA JUNIOR, G. B.; ALVES, E.; MUELLER, C.; VILELA, L. Análise econômica e de risco da pecuária extensiva no Cerrado. In: CONGRESSO SOCIEDADE BRASILEIRA DE ECONOMIA ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 48., 2010, Campo Grande, MS. Campo Grande, MS: Sociedade Brasileira de Economia, Administração e Sociologia Rural, 2010. SOBER| Biblioteca(s): Embrapa Unidades Centrais. |
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| 35. | | MARTHA JUNIOR, G. B.; ALVES, E. R. de A. The role and impact of public research and technology transfer in Brazilian agriculture. In: KALAITZANDONAKES, N.; CARAYANNIS, E. G.; GRIGOROUDIS, E.; ROZAKIS, S. (Ed.). From agriscience to agribusiness: theories, policies and practices in technology transfer and commercialization. Switzerland: Springer, 2018. p. 429-444. (Innovation, technology, and knowledge management). Na publicação: Eliseu Alves.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| Registros recuperados : 179 | |
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