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Title: Bentonites impregnated with TiO2 for photodegradation of methylene blue
Authors: Rossetto, Enéderson
Petkowicz, Diego Ivan
Santos, João Henrique Zimnoch dos
Pergher, Sibele Berenice Castellã
Penha, Fábio Garcia
Keywords: Bentonites;Diatomites;Titanium oxide;Photodegradation
Issue Date: May-2010
Publisher: Elsevier
Citation: PERGHER, Sibele Berenice Castellã et al. Bentonites impregnated with TiO2 for photodegradation of methylene blue. Applied Clay Science, [s. l.], v. 48, n. 4, p. 602-606, maio 2010. ISSN 0169-1317. DOI Disponível em: Acesso em 16 maio 2020.
Portuguese Abstract: Four bentonites and one diatomite from Rio Negro (Argentina) were used as supports for titanium oxide (TiO2). The materials were characterized by X-ray diffraction, scanning electron microscopy, infrared spectroscopy, textural analysis by nitrogen adsorption, elemental analysis and diffuse reflectance spectroscopy. The specific surface areas calculated by the BET method were 76, 46, 80, and 31 for the bentonites and 153 m2/g for diatomite and were not changed by impregnation with TiO2. SEM analysis revealed agglomerates, probably due to titania domains on the surface. The properties of the lamellar materials were maintained after TiO2 impregnation, and all materials showed methylene blue photodegradation activity. The bentonites showed a higher activity than the commercial catalyst P25, likely due to the TiO2 distribution and better accessibility.
ISSN: 0169-1317
Appears in Collections:IQ - Artigos publicados em periódicos

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