Morphology and topography analysis of mesoporous titania templated by micrometric latex sphere arrays

Autor(es):Mostrar menos -

Barros Filho, D. A. ^[1] ; Benedetti, J. E. ^[2] ; Pereira-da-Silva, M. A. ^{[3, 4]} ; Seriacopi, V. ^[5] ; Gomes Silva, W. R. ^[5] ; Alonso, R. C. B. ^[1] ; Lewgoy, H. R. ^[1] ; Anido-Anido, A. ^[1] ; Amore, R. ^[1] ; Anauate-Netto, C. ^[1] ; Avellaneda, C. O. ^[6] ; Santilli, Celso V. ^[7] ; Nogueira, Ana F. ^[2]

Afiliação do(s) autor(es)

^[1] Anhanguera Bandeirante Univ, Sch Dent, BR-02071013 Sao Paulo - Brazil

^[2] Univ Estadual Campinas, Inst Chem, BR-13084862 Campinas, SP - Brazil

^[3] UNICEP, Ctr Univ Cent Paulista, BR-13563470 Sao Carlos, SP - Brazil

^[4] USP, Inst Fis Sao Carlos, BR-13560250 Sao Carlos, SP - Brazil

^[5] Anhanguera Bandeirante Univ, Politech Inst ABC & Osasco Campi, BR-02071013 Sao Paulo - Brazil

^[6] Univ Fed Pelotas, CDTec, BR-9601000 Pelotas, SC - Brazil

^[7] UNESP, Inst Quim, BR-14800900 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microporous and Mesoporous Materials; v. 152, p. 84-95, APR 1 2012.
• Citações Web of Science: 2

Resumo

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. (AU)

• Processo FAPESP: 08/00463-2 - Síntese e caracterização de filmes híbridos de titânia meso/macroporosa
• Beneficiário: Djalma de Albuquerque Barros Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular