Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 23, Pages 3628-3635Publisher
WILEY-BLACKWELL
DOI: 10.1002/ejic.201000427
Keywords
Mesoporous materials; Silica; Inorganic-organic hybrid composites; Gold; Sulfur
Categories
Funding
- European Community
- COST D36 action
- POR Sicilia
- Misura 3 15 Azione C Quota Regionale
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Hexagonal mesoporous silica (HMS) is functionalised with mercaptopropyl groups by adopting two different procedures, co-condensation and grafting. In both cases tetraethylorthosilicate (TEOS) and 3-mercaptopropyltriethoxysilane (3-MPTES) are used as the silicon and sulfur precursors, respectively. The obtained materials are analysed by several techniques such as N-2 sorption, TG-DTA, XRD, SAXS and -solid state Si-29 {H-1} CP-MAS NMR spectroscopy By taking advantage of the chemical interaction between gold and the -SH groups, the effect of the thiol addition procedure on the supporting capability of the functionalised silica is evaluated by depositing gold through the incipient wet Impregnation technique The Influence of the functionalisation method on the electronic structure of gold and on its surface distribution is determined by extended X-ray fine absorption spectra (EXAFS) of Au at the L-III edge and by X-ray photoelectron spectroscopy (XPS)
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