Michalik, Jacek, Brown, D.R., Yu, Jong-Sung, Danilczuk, Marek, Kim, Jeong Yeon and Kevan, Larry (2001) Conduction electron paramagnetic resonance of metal nanoparticles in AlMCM-41 aluminosilica mesoporous molecular sieves. Physical Chemistry Chemical Physics, 3 (9). pp. 1705-1709. ISSN 14639076
Metadata only available from this repository.Abstract
Mesoporous aluminosilica molecular sieves AlMCM-41 are loaded with different amounts of Ag+, Pd2+ and Pt2+ ions by varying the Si/Al ratio, which changes the ion exchange capacity. These metal ions are reduced to metal particles by hydrogen and characterized by conduction electron paramagnetic resonance (CEPR). Metal particle sizes were calculated from the Kawabata theory that relates CEPR linewidths to metal particle size. The CEPR linewidths are independent of metal ion loading, which suggests that the metal particles are located inside the AlMCM-41 channels and size constrained by the channel diameter. The calculated metal particle diameters are about 1 nm, which is smaller than the 3.5 nm channel diameter of AlMCM-41. The validity of Kawabata's theory to such systems may need reexamination
Item Type: | Article |
---|---|
Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
Schools: | School of Applied Sciences School of Applied Sciences > Materials and Catalysis Research Centre |
Related URLs: | |
Depositing User: | Sara Taylor |
Date Deposited: | 16 Oct 2008 09:09 |
Last Modified: | 28 Aug 2021 10:42 |
URI: | http://eprints.hud.ac.uk/id/eprint/2237 |
Downloads
Downloads per month over past year
Repository Staff Only: item control page
![]() |
View Item |