A Study of Silver Species on Silver-Exchanged ETS-10 and Mordenite by XRD, SEM and Solid-State Ag-109, Si-29 and Al-27 NMR Spectroscopy

作者：Liu Yan; Chen Fu; Wasylishen Roderick E; Xu Zhenghe; Sawada James; Kuznicki Steven M^*

来源：Journal of Nanoscience and Nanotechnology, 2012, 12(8): 6420-6427.

DOI：10.1166/jnn.2012.6437

• Silver
• Mordenite
• Molecular Sieves
• Solid-State NMR
• Spectroscopy
• Mercury Adsorption

Silver zeolites, especially Ag-ETS-10 and Ag-mordenite, actively bind xenon and iodine, two prime contaminants common to nuclear accidents. The evolution of silver species on silver exchanged ETS-10 (Ag/ETS-10) and mordenite (Ag/Mor) has been investigated by exposing the materials to a series of activation conditions in Ar, air and H-2. The samples were characterized by XRD, SEM and solid-state Ag-109, Si-29 and Al-27 MAS NMR. The silver reduction and structural evolution have been illustrated by those techniques. The effectiveness of one sample of each type of sieve was tested for its ability to trap mercury from a gas stream. However, the results from this study demonstrate that the adsorption characteristics of silver-loaded sieves cannot necessarily be predicted using a full complement of structural characterization techniques, which highlights the importance of understanding the formation and nature of silver species on molecular sieves.

• 出版日期2012-8