Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 2, 2000
Previous Article Next Article

Synthesis and characterization of copper containing mesoporous silicas

Author affiliations

Abstract

A series of copper containing mesoporous silicas has been prepared at room temperature using tetramethylorthosilicate as the source of silicon, a quaternary ammonium chloride salt as organic template surfactant and copper complexes obtained from organofunctional silicon molecules as ligands. Using this synthetic route, it was possible to prepare mesoporous materials containing up to 4.7 wt% copper. The structure and the sorption properties of the obtained materials have been studied by X-ray diffraction, Fourier-transform reflectance IR spectroscopy, transmission electron microscopy and surface area measurements. All experimental data reveal that calcined products containing up to 2.4 wt% copper retain the basic structural characteristics of MCM-41 materials, while higher copper loading leads to progressive destruction of hexagonal structure. Electron paramagnetic resonance was used to study the symmetry and environment of Cu(II) species in the silicate framework of the as synthesized and calcined materials, as well as the accessibility of these centers to polar adsorbed molecules, such as pyridine. The spectra of calcined materials indicate a distorted octahedral geometry for the Cu(II) centers which were easily accessible by pyridine molecules. Cyclic voltammetry showed that calcined copper containing mesoporous samples exhibit a marked electroactivity indicating that most of the copper centers are distributed on the mesoporous surfaces.

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 08 Jun 1999, accepted on 07 Dec 1999 and first published on 27 Jan 2000


Article type: Paper
DOI: 10.1039/A904545G
Citation: J. Mater. Chem., 2000,10, 403-408
  •   Request permissions

    Synthesis and characterization of copper containing mesoporous silicas

    M. A. Karakassides, A. Bourlinos, D. Petridis, L. Coche-Guerènte and P. Labbè, J. Mater. Chem., 2000, 10, 403
    DOI: 10.1039/A904545G

Search articles by author