Co2+ Ions as Probes of Al Distribution in the Framework of Zeolites. ZSM-5 Study

0181429 - UFCH-W 20020095 RIV GB eng J - Článek v odborném periodiku
Dědeček, Jiří - Kaucký, Dalibor - Wichterlová, Blanka - Gonsiorová, O.
Co2+ Ions as Probes of Al Distribution in the Framework of Zeolites. ZSM-5 Study.
Physical Chemistry Chemical Physics. Roč. 4, - (2002), s. 5406-5413. ISSN 1463-9076. E-ISSN 1463-9084
Grant CEP: GA MŠMT OC D15.20
Výzkumný záměr: CEZ:AV0Z4040901
Klíčová slova: Al distribution in zeolites * ZSM-5 * Vis spectroscopy
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 1.838, rok: 2002

The occurrence of 'Al pairsö in the framework of ZSM-5 and their spatial distribution in zeolites was estimated by using exchanged Co2+ ions as probes for 'Al pairs'. The Vis spectra of Co2+ ions were employed to monitor the distribution of Co2+ ions, and thus 'Al pairs', among the individual cationic sites, i.e. local framework arrangements at defined positions in the zeolite channels. The effects of concentration of aluminum in the framework and conditions of zeolite synthesis on the presence of 'Al pairs' and their spatial distribution in the ZSM-5 framework were investigated. It has been shown that the distribution of Al atoms in the framework is not controlled by statistic rules, but depends on the conditions of zeolite synthesis and aluminum concentration in the framework.
Trvalý link: http://hdl.handle.net/11104/0078001