Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
de Moraes, Nicolas Perciani [1] ; Bacetto, Leticia Araujo [1] ; Paiva, Livia Kent [1] ; dos Santos, Gabriela Spirandelli [1] ; Caetano Pinto da Silva, Maria Lucia [1] ; Rodrigues, Liana Alvares [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Chem Engn, Engn Sch Lorena, EEL, Campinho Municipal Rd S-N, BR-12602810 Lorena, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Journal of Sol-Gel Science and Technology; v. 89, n. 2, p. 571-585, FEB 2019.
Citações Web of Science: 1
Resumo

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 pH(PZC)<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. (AU)

Processo FAPESP: 16/20920-5 - Fotocatálise heterogênea aplicada na degradação de poluentes orgânicos utilizando catalisador híbrido de óxido de zinco-xerogel de carbono
Beneficiário:Nicolas Perciani de Moraes
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 15/08995-7 - Preparação, modificação e avaliação catalítica de fotocatalisadores à base de Nb2O5
Beneficiário:Liana Alvares Rodrigues
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 16/04244-0 - Preparação, modificação e avaliação catalítica de fotocatalisadores híbridos TiO2/Xerogel de carbono
Beneficiário:Nicolas Perciani de Moraes
Linha de fomento: Bolsas no Brasil - Iniciação Científica