RADIATION-INDUCED SILVER AGGLOMERATION IN MOLECULAR-SIEVES - A COMPARISON BETWEEN A-ZEOLITES AND X-ZEOLITES

被引:10
作者
SADLO, J
WASOWICZ, T
MICHALIK, J
机构
[1] Department of Radiation Chemistry and Technology, Institute of Nuclear Chemistry and Technology, 03-195 Warsaw
来源
RADIATION PHYSICS AND CHEMISTRY | 1995年 / 45卷 / 06期
关键词
D O I
10.1016/0969-806X(94)E0045-K
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The stabilization conditions of silver atoms and clusters in hydrated and dehydrated AgNa-A and AgNa-X zeolites gamma-irradiated at 77 K have been studied by ESR. It was found that silver agglomeration mechanisms in hydrated A and X zeolites are very similar and are controlled by the migration of silver atoms into the alpha-cages. In dehydrated zeolites agglomeration leads to completely different silver clusters in A and X zeolites. Small cationic clusters are stabilized in A zeolites and metallic clusters in X zeolites. Various factors affecting the agglomeration process in A and X zeolites are discussed.
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页码:909 / 915
页数:7
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