Number of the records: 1
Isomorphous Introduction of Boron in Germanosilicate Zeolites with UTL Topology
- 1.
SYSNO ASEP 0359686 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Isomorphous Introduction of Boron in Germanosilicate Zeolites with UTL Topology Author(s) Shvets, O. V. (UA)
Shamzy, M. V. (UA)
Yaremov, P. S. (UA)
Musilová, Zuzana (UFCH-W)
Vitvarová, Dana (UFCH-W) RID
Čejka, Jiří (UFCH-W) RID, ORCID, SAISource Title Chemistry of Materials. - : American Chemical Society - ISSN 0897-4756
Roč. 23, č. 10 (2011), s. 2573-2585Number of pages 13 s. Language eng - English Country US - United States Keywords UTL zeolite ; boron incorporation ; structure-directing agent Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/08/0604 GA ČR - Czech Science Foundation (CSF) GAP106/11/0819 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000290594700011 DOI 10.1021/cm200105f Annotation The direct introduction of boron into the framework of germanosilicate zeolites with UTL topology using different organic spiro azo compounds as structure-directing agents (SDAs) was performed. The influence of the SDA's nature, chemical composition and pH of the reaction mixture, and duration of the synthesis on the phase selectivity, limit of isomorphous introduction of boron into the zeolite framework and its location and coordination, and adsorption and acidic properties of prepared borogermanosilicates was investigated in detail. Experimental data provided clear evidence that the properties of the SDAs control the upper limit of the B content in the reaction mixture for successful synthesis of a pure UTL phase. UTL is formed in the pH region having the highest concentration of Ge8O15(OH)53– (D4R) in water. In synthesized UTL samples the contents of Si and Ge depend particularly on the pH values of the reaction mixtures with similar chemical compositions. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
Number of the records: 1