|
|||||
|
|
Nanosecond probing of the early nucleation steps of silver atoms in colloidal zeolite by pulse radiolysis and flash photolysis techniques |
|
| Authors: | Z. Tahri F. Luchez I. Yordanov O. Poizat A. Moissette V. Valtchev S. Mintova M. Mostafavi V. De Waele |
| Affiliation: | 1.Laboratoire de Chimie Physique, UMR 8000 CNRS,Université Paris Sud,Orsay,France;2.Laboratoire de Spectrochimie Infrarouge et Raman (UMR 8516 de l’Université et du CNRS), Centre d’Etudes et de Recherches Lasers et Applications (FR 2416 du CNRS), Bat. C5,Université des Sciences et Technologies de Lille,Villeneuve d’Ascq,France;3.Laboratoire des Matériaux à Porosité Contr?lée, UMR 7016 CNRS,Université Hautes Alsace,Mulhouse,France |
| Abstract: | The process of formation and the subsequent aggregation of silver atoms (Ag0) in nanosized zeolite beta (BEA) are studied by transient absorption spectroscopy. The zeolite nanocrystals are stabilized in aqueous colloidal suspensions with a narrow particle size distribution in the range 30–60 nm. The reduction of silver cations is initiated either by pulse radiolysis of the aqueous suspension or by photoinduced electron transfer using an organic electron donor adsorbed in the zeolite framework. The silver atom in BEA nanosized crystals is found to be stable on the microsecond timescale. |
| Keywords: | Silver aggregates Nanosized zeolite beta Transient absorption spectroscopy Radiolysis Photolysis |
| 本文献已被 SpringerLink 等数据库收录！ | |