The key to control Cu II loading in silica based mesoporous materials

Nancy Brodie-Linder 1, 2 Régis Besse 1 Fabrice Audonnet 3, 2 Sophie Le Caer 4 Johnny Deschamps 2, 5 Marianne Impéror-Clerc 6 Christiane Alba-Simionesco 2, 3
1 Département de Chimie
2 LCPO - Laboratoire de Chimie Physique D'Orsay
3 LLB - UMR 12 - Laboratoire Léon Brillouin
4 SCM - Service de Chimie Moléculaire
5 UCP - Unité de Chimie et Procédés
6 LPS - Laboratoire de Physique des Solides
Abstract : Cu II loading on porous silica surfaces has been shown in the past to be easy to perform but no precise control on the amount of copper loaded has been elucidated. Here, controlled Cu II loading can be accomplished at ambient temperature in a reaction time of 10 min for loadings of 6-20% Cu (w/w). Analysis by UV-visible spectroscopy of copper uptake in SBA-15 materials has shown that the pH of the solution and the consequent complexation of the Cu II cation dictates the amount of Cu (II) impregnation. The key to the success of this control is the presence of the [Cu(NH3)3(H2O)3]2+ complex in the reaction solution. FT-IR, diffuse reflectance UV-visible spectroscopy, N2 adsorption, TEM (transmission electronic microscopy) and SAXS (small angle X-ray scattering) analyses were performed on the obtained SBA-15 Cu materials illustrating a well dispersed Cu (II) covering of the SBA-15 surface. © 2010 Elsevier Inc. All rights reserved.
Keywords : Copper speciation Mesoporous materials Adsorption IR spectroscopy
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Journal articles
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Submitted on : Tuesday, July 30, 2013 - 4:00:21 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:04 AM

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Nancy Brodie-Linder, Régis Besse, Fabrice Audonnet, Sophie Le Caer, Johnny Deschamps, et al.. The key to control Cu II loading in silica based mesoporous materials. Microporous and Mesoporous Materials, Elsevier, 2010, 132 (3), pp.518-525. ⟨10.1016/j.micromeso.2010.04.001⟩. ⟨hal-00848773⟩

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