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Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants.
de Jesus, Edson Tobias; Moreira, Ailton José; Sá, Mayara Coelho; Freschi, Gian Paulo Giovanni; Joya, Miryam Rincón; Li, Maximo Siu; Paris, Elaine Cristina.
Afiliação
  • de Jesus ET; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, zip code, São Carlos, SP, 13560-970, Brazil.
  • Moreira AJ; Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code, São Carlos, SP, 13565-905, Brazil.
  • Sá MC; Federal Institute of Education, Science and Technology of Maranhão, Baronesa street, zip code, Alcântara, MA, 65250-000, Brazil.
  • Freschi GPG; Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code, São Carlos, SP, 13565-905, Brazil.
  • Joya MR; LAFFEQ, Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil.
  • Li MS; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, zip code, São Carlos, SP, 13560-970, Brazil.
  • Paris EC; Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code, São Carlos, SP, 13565-905, Brazil.
Environ Sci Pollut Res Int ; 28(48): 69401-69415, 2021 Dec.
Article em En | MEDLINE | ID: mdl-34302247
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Ambientais / Nanofibras Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Ambientais / Nanofibras Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha