Journal
CATALYSIS TODAY
Volume 68, Issue 1-3, Pages 63-68Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0920-5861(01)00323-6
Keywords
nanosized metal oxides; mesoporous materials; MCM-41; MCM-48; host-guest chemistry
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The present work describes the preparation and characterization of nanosized metal oxide particles (Fe2O3, ZnO and PbO) inside the mesopore channels of MCM-41 and MCM-48 silicate molecular sieves. The encapsulation of the metal oxides was carried out at room temperature by the incipient wetness method. Diffuse reflectance ultraviolet-visible spectroscopic studies showed a significant shift in the absorption band for the entrapped metal oxides as compared to the corresponding bulk oxides. Thus, confirming the quantum confinement of the incorporated nanoparticles in MCM-41 and MCM-48. (C) 2001 Elsevier Science B.V. All rights reserved.
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