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Type: Artigo de periódico
Title: Morphology and topography analysis of mesoporous titania templated by micrometric latex sphere arrays
Author: Barros Filho, D. A.
Benedetti, J. E.
Pereira-da-Silva, M. A.
Seriacopi, V.
Gomes Silva, W. R.
Alonso, R. C. B.
Lewgoy, H. R.
Anido-Anido, A.
Amore, R.
Anauate-Netto, C.
Avellaneda, C. O.
Santilli, Celso V.
Nogueira, Ana F.
Abstract: In this work, mesoporous titania is prepared by templating latex sphere arrays with four different sphere diameters at the micrometric scale (phi > 1 mu m). The mesoporous titania homogeneously covers the latex spheres and substrate, forming a thin coating characterized by N-2 adsorption isotherm, small angle X-rays scattering, atomic force, field emission and transmission electronic microscopies. Mesoporous titania has been templated into different shapes such as hollow particles and monoliths according to the amount of sol used to fill the voids of the close packed latex spheres. Titania topography strongly depends on the adsorption of polymeric segments over latex spheres surface, which could be decreased by changing the dimensions of latex spheres (phi = 9.5 mu m) generating a lamellar architecture. Thus, micrometric latex sphere arrays can be used to achieve new surface patterns for mesoporous materials via a fast and inexpensive chemical route for construction of functional devices in different technological fields such as energy conversion, inclusion chemistry and biomaterials. (C) 2011 Elsevier Inc. All rights reserved.
Subject: Mesoporous titania
Chemical template
Thin film
Particles aggregation
Surface characterization
Editor: Elsevier
Citation: Microporous and Mesoporous Materials. Elsevier, v.152, p.84-95, 2012
Rights: fechado
Identifier DOI: 10.1016/j.micromeso.2011.11.056
Date Issue: 2012
Appears in Collections:IQ - Artigos e Outros Documentos

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