Artigo de periodico

Novel and inexpensive Nb2O5/tannin-formaldehyde xerogel composites as substitutes for titanium dioxide in photocatalytic processes (2019)

• Authors:
  • Moraes, Nícolas Perciani de
  • Bacetto, Leticia Araujo
  • Paiva, Livia Kent
  • Santos, Gabriela Spirandelli dos
  • Silva, Maria Lucia Caetano Pinto da
  • Rodrigues, Liana Alvares
• USP affiliated authors: SILVA, MARIA LÚCIA CAETANO PINTO DA - EEL ; RODRIGUES, LIANA ALVARES - EEL ; BACETTO, LETÍCIA ARAUJO - EEL ; SANTOS, GABRIELA SPIRANDELLI DOS - EEL ; PAIVA, LIVIA KENT - EEL ; MORAES, NÍCOLAS PERCIANI DE - EEL
• Unidade: EEL
• DOI: 10.1007/s10971-018-4905-6
• Subjects: FOTOCATÁLISE; NIÓBIO; TANINO
• Keywords: Photocatalysis; Niobium oxide; Tannin; Xerogel
• Agências de fomento:
  • Financiamento CAPES
  • Financiamento FAPESP
• Language: Inglês
• Abstract: This project studied the preparation of new Nb2O5/tannin-formaldehyde xerogel composites (XTF-wNb) for photocatalytical applications. The choice of tannin biomass and niobium recycled scraps as precursors is aimed at reducing costs and environmental impacts. The composites were characterized by diffuse reflectance spectroscopy (DR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), infrared spectroscopy (IR), and X-ray diffraction (XRD). The photocatalytic properties of the composites were evaluated by methylene blue decomposition. The influence of the catalyst dosage and the initial concentration of dye in the adsorption and photocatalysis processes were studied. The X-ray profiles of the XTF-wNb show the presence of niobic acid in the structure of the materials, proving the presence of the inorganic oxide in the matrix of these composites. The tannin/Nb ratio had a significant influence on the morphology of the formed composites, causing changes in the shape and size of the particles composing each material. All materials have pHPZC < 5. The XTF-24Nb was the most effective photocatalyst, its photocatalytic efficiency superior to the one of titanium dioxide, evidencing the beneficial effect of the xerogel coupling on the photocatalytic properties of the material.
• Imprenta:
  • Publisher place: Basel
  • Date published: 2019
• Source:
  • Título: Journal of sol-gel science and technology
  • ISSN: 09280707
  • Volume/Número/Paginação/Ano: v.89, p.571-585, 2019

Informações sobre o DOI: 10.1007/s10971-018-4905-6 (Fonte: oaDOI API)
• Este periódico é de assinatura
• Este artigo NÃO é de acesso aberto
  
• Cor do Acesso Aberto: closed

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• ABNT

  MORAES, Nícolas Perciani de et al. Novel and inexpensive Nb2O5/tannin-formaldehyde xerogel composites as substitutes for titanium dioxide in photocatalytic processes. Journal of sol-gel science and technology, v. 89, p. 571-585, 2019Tradução . . Disponível em: https://doi.org/10.1007/s10971-018-4905-6. Acesso em: 28 dez. 2025.

• APA

  Moraes, N. P. de, Bacetto, L. A., Paiva, L. K., Santos, G. S. dos, Silva, M. L. C. P. da, & Rodrigues, L. A. (2019). Novel and inexpensive Nb2O5/tannin-formaldehyde xerogel composites as substitutes for titanium dioxide in photocatalytic processes. Journal of sol-gel science and technology, 89, 571-585. doi:10.1007/s10971-018-4905-6

• NLM

  Moraes NP de, Bacetto LA, Paiva LK, Santos GS dos, Silva MLCP da, Rodrigues LA. Novel and inexpensive Nb2O5/tannin-formaldehyde xerogel composites as substitutes for titanium dioxide in photocatalytic processes [Internet]. Journal of sol-gel science and technology. 2019 ;89 571-585.[citado 2025 dez. 28 ] Available from: https://doi.org/10.1007/s10971-018-4905-6

• Vancouver

  Moraes NP de, Bacetto LA, Paiva LK, Santos GS dos, Silva MLCP da, Rodrigues LA. Novel and inexpensive Nb2O5/tannin-formaldehyde xerogel composites as substitutes for titanium dioxide in photocatalytic processes [Internet]. Journal of sol-gel science and technology. 2019 ;89 571-585.[citado 2025 dez. 28 ] Available from: https://doi.org/10.1007/s10971-018-4905-6

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