Synthesis of Robust Hierarchical Silica Monoliths by Surface-Mediated Solution/Precipitation Reactions over Different Scales: Designing Capillary Microreactors for Environmental Applications

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Title: Synthesis of Robust Hierarchical Silica Monoliths by Surface-Mediated Solution/Precipitation Reactions over Different Scales: Designing Capillary Microreactors for Environmental Applications
Authors: García Aguilar, Jaime | Miguel García, Izaskun | Berenguer-Murcia, Ángel | Cazorla-Amorós, Diego
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Hierarchical silica monoliths | Silica thin film | Surface mediated fillings | Solution/precipitation reactions | CO oxidation | Capillary microreactors
Knowledge Area: Química Inorgánica
Issue Date: 24-Nov-2014
Publisher: American Chemical Society
Citation: ACS Applied Materials & Interfaces. 2014, 6(24): 22506-22518. doi:10.1021/am506595c
Abstract: A synthetic procedure to prepare novel materials (surface-mediated fillings) based on robust hierarchical monoliths is reported. The methodology includes the deposition of a (micro- or mesoporous) silica thin film on the support followed by growth of a porous monolithic SiO2 structure. It has been demonstrated that this synthesis is viable for supports of different chemical nature with different inner diameters without shrinkage of the silica filling. The formation mechanism of the surface-mediated fillings is based on a solution/precipitation process and the anchoring of the silica filling to the deposited thin film. The interaction between the two SiO2 structures (monolith and thin film) depends on the porosity of the thin film and yields composite materials with different mechanical stability. By this procedure, capillary microreactors have been prepared and have been proved to be highly active and selective in the total and preferential oxidation of carbon monoxide (TOxCO and PrOxCO).
Sponsor: We thank the MINECO, GV, and FEDER (Projects CTQ2012-31762 and PROMETEOII/2014/010) for financial support. A.B.M. and J.G.A. thanks the Spanish Ministry of Economy and Competitiveness (MINECO) for their fellowships (RyC 2009-03913 and BES-2013-063678, respectively).
URI: http://hdl.handle.net/10045/44748
ISSN: 1944-8244 (Print) | 1944-8252 (Online)
DOI: 10.1021/am506595c
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 American Chemical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1021/am506595c
Appears in Collections:INV - MCMA - Artículos de Revistas

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