caa a22 4500 477091865 CHVBK 20180405111517.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF01135362 doi (NATIONALLICENCE)springer-10.1007/BF01135362 Encapsulation of transition metal species into zeolites and molecular sieves as redox catalysts: Part I-preparation and characterisation of nanosized TiO2, CdO and ZnO semiconductor particles anchored in NaY zeolite [Elektronische Daten] [X. Zhao, G. Lu, G. Millar] In this paper, we report the preparation and characterisation of nanometer-sized TiO2, CdO, and ZnO semiconductor particles trapped in zeolite NaY Preparation of these particles was carried out via the traditional ion exchange method and subsequent calcination procedure. It was found that the smaller cations, i.e., Cd2+ and Zn2+ could be readily introduced into the SI' and SII' sites located in the sodalite cages, through ion exchange; while this is not the case for the larger Ti species, i.e., Ti monomer [TiO]2+ or dimer [Ti2O3]2+ which were predominantly dispersed on the external surface of zeolite NaY The subsequent calcination procedure promoted these Ti species to migrate into the internal surface of the supercages. These semiconductor particles confined in NaY zeolite host exhibited a significant blue shift in the UV VIS absorption spectra, in contrast to the respective bulk semiconductor materials, due to the quantum size effect (QSE). The particle sizes calculated from the UV VIS optical absorption spectra using the effective mass approximation model are in good agreement with the atomic absorption data. Kluwer Academic Publishers, 1996 zeolite NaY nationallicence semiconductor cluster nationallicence UV absorption nationallicence effective mass approximation nationallicence Zhao X. Department of Chemical Engineering, The University of Queensland, 4072, St. Lucia, Qld, Australia aut Lu G. Department of Chemical Engineering, The University of Queensland, 4072, St. Lucia, Qld, Australia aut Millar G. Department of Chemistry, The University of Queensland, 4072, St. Lucia, Qld, Australia aut Journal of Porous Materials Kluwer Academic Publishers 3/1(1996-03-01), 61-66 1380-2224 3:1<61 1996 3 10934 https://doi.org/10.1007/BF01135362 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01135362 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao X. Department of Chemical Engineering, The University of Queensland, 4072, St. Lucia, Qld, Australia aut NATIONALLICENCE 700 1- Lu G. Department of Chemical Engineering, The University of Queensland, 4072, St. Lucia, Qld, Australia aut NATIONALLICENCE 700 1- Millar G. Department of Chemistry, The University of Queensland, 4072, St. Lucia, Qld, Australia aut NATIONALLICENCE 773 0- Journal of Porous Materials Kluwer Academic Publishers 3/1(1996-03-01), 61-66 1380-2224 3:1<61 1996 3 10934 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer