Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 58, Issue 3, Pages 201-211Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1387-1811(02)00626-1
Keywords
auto-reduction; gold nanoparticle; MCM-41; organo-functionalized mesoporous silica; organo-inorganic nanocomposite
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A convenient method for the synthesis and simultaneous stabilization of gold nanoparticles in organo-functionalized MCM-41 is described. The silanol groups present on the surface of the mesoporous matrix reduce aqueous chloroaurate ions, resulting in the formation of gold nanoparticles, which are subsequently anchored to the host matrix via organic functionality. The method, in which propylamine-MCM-41 or propylthiol-MCM-41 is treated with a dilute aqueous solution of HAuCl4 at ambient conditions, is quite simple and environmentally benign as there is no need to add any external reducing agent. The nano-Au-MCM-41 hybrid materials were characterized by XRD, UV-Vis, TEM, XPS, EDX and N-2 adsorption measurements. (C) 2002 Elsevier Science Inc. All rights reserved.
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