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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Dept Chem Engn, Engn Sch Lorena, EEL, Campinho Municipal Rd S-N, BR-12602810 Lorena, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Sol-Gel Science and Technology; v. 89, n. 2, p. 571-585, FEB 2019.
Web of Science Citations: 1
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 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)

FAPESP's process: 15/08995-7 - Preparation, modification and catalytic evaluation of Nb2O5-based photocatalysts
Grantee:Liana Alvares Rodrigues
Support type: Regular Research Grants
FAPESP's process: 16/04244-0 - Preparation, modification and catalytic evaluation of TiO2-based photocatalysts
Grantee:Nicolas Perciani de Moraes
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 16/20920-5 - Heterogeneous photocatalysis applied in the degradation of organic pollutants using a hybrid zinc oxide-carbon xerogel as catalyst
Grantee:Nicolas Perciani de Moraes
Support type: Scholarships in Brazil - Master