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| 1. |  | ANDRADE JÚNIOR, A. S. de; RODRIGUES, B. H. N.; ATHAYDE SOBRINHO, C.; BASTOS, E. A.; MELO, F. de B; CARDOSO, M. J.; SILVA, P. H. S. da; DUARTE, R. L. R. A cultura da melancia. 2. ed. rev. e ampl. Brasília, DF: Embrapa Informação Tecnológica; Teresina: Embrapa Meio-Norte, 2007. 85 p. (Coleção Plantar, 57).| Biblioteca(s): Embrapa Acre; Embrapa Agrobiologia; Embrapa Algodão; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Cerrados; Embrapa Hortaliças; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte; Embrapa Pantanal; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Rondônia; Embrapa Roraima; Embrapa Semiárido; Embrapa Solos; Embrapa Unidades Centrais; Embrapa Uva e Vinho. MenosEmbrapa Acre; Embrapa Agrobiologia; Embrapa Algodão; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Cerrados; Embrapa Hortaliças; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte... Mostrar Todas |
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Registro Completo
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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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Circulação/Nível: |
A - 1 |
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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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