Ion-exchanged zeolites as functional inorganic materials.
نویسندگان
چکیده
منابع مشابه
Density Functional Study of Copper-Exchanged Zeolites and Related Microporous Materials: Adsorption of Nitrosyls
DFT periodic, ONIOM, and cluster studies with all-electron basis sets are applied to Cu(I) exchanged zeolites and silicoalumino-phosphate analogs with faujasite and chabazite topology. The reactivity of the cations at different cation positions is probed by NO adsorption. In the ONIOM approach, the cation center and the nearest framework environment are described by DFT, whereas a larger part o...
متن کاملIon-Exchanged Binuclear Clusters As Active Sites of Selective Oxidation over Zeolites
A new catalytic oxidation cycle over binuclear Znand Ca-cation clusters in zeolites is proposed. Intermediate active clusters appear due to trapping of dioxygen. CO oxidation is considered as a model reaction over a cluster located in an 8-membered (8R) ring. Geometries of active clusters involved in the catalytic cycle vary depending on the nature and size of the cation. Reagents, transition s...
متن کاملInteractions between CO and Poly(p-phenylene vinylene) as Induced by Ion-Exchanged Zeolites
The effects of zeolite type, ion-exchanged level, and ion type on the electrical conductivity responses of poly(p-phenylene vinylene) (PPV), doped poly(p-phenylene vinylene) (dPPV) and zeolite composites under CO exposures were investigated. The electrical sensitivity of dPPV/Cu-ZSM5(Si/Al = 23) system shows a negative sensitivity value of −0.154, while the Na system gives a positive sensitivit...
متن کاملDiffusion of CO2 in ion-exchanged zeolites Rho studied by the ZLC technique
The ZLC technique, first introduced for diffusion measurements in zeolites, has been continuously developed proving its validity in the investigation of the kinetic and equilibrium properties in solid adsorbents. The very small size of the column offers several key advantages compared to other experimental methods: foremost, the small required sample quantity (1–2 mg for kinetic measurements to...
متن کاملFunctional Inorganic Materials: From Precursors to Applications
International customers, please contact your local Sigma-Aldrich office. For worldwide contact information, please see last page. Material Matters is also available at aldrich.com/matsci. Aldrich brand products are sold through Sigma-Aldrich Co. LLC. Purchaser must determine the suitability of the product for its particular use. See product information on the Sigma-Aldrich website at sigma-aldr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Hyomen Kagaku
سال: 1990
ISSN: 0388-5321,1881-4743
DOI: 10.1380/jsssj.11.110