Title In situ IR spectroscopic study to reveal the impact of the synthesis conditions of zeolite $\beta$ nanoparticles on the acidic properties of the resulting zeoliteIn situ IR spectroscopic study to reveal the impact of the synthesis conditions of zeolite $\beta$ nanoparticles on the acidic properties of the resulting zeolite Author van Oers, C.J. Góra-Marek, K. Sadowska, K. Mertens, M. Meynen, V. Datka, J. Cool, P. Faculty/Department Faculty of Sciences. Chemistry Research group Laboratory of adsorption and catalysis Publication type article Publication 2014Lausanne, 2014 Subject Chemistry Source (journal) Chemical engineering journal. - Lausanne Volume/pages 237(2014), p. 372-379 ISSN 1385-8947 0300-9467 ISI 000329891900046 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract Zeolite β has been synthesised by hydrothermally ageing zeolite β nanoparticles. The influence of a small variation in the synthesis conditions of the zeolite nanoparticles solution, i.e. a hydrothermal synthesis temperature of 373 K versus 423 K, on the structural and acidic properties is examined. The structural characteristics, as determined via N2-sorption, DRIFT, XRD and SEM, do not show clear discrepancies. However, an extensive study of the aluminium coordination (27Al MAS NMR) and the acidic characteristics (in situ FT-IR with NH3 and CO as probe) reveal a difference between the two nanoparticles based zeolites. Although both zeolites exhibit a similar total acid site concentration, a clear impact of the synthesis temperature on the protonic bridging hydroxyls (Si(OH)Al) concentration has been detected. Hence, even though both nanoparticles solutions have been submitted to a further hydrothermal synthesis period of several days, the differences induced by the variation in temperature during the formation of the nanoparticles (first 24 h) remain in the final structure. This knowledge not only allows the tailoring of the material characteristics of the full-grown zeolites, but also reveals important aspects to be taken into account in f.e. the up-scaling of zeolite synthesis for catalytic applications, in which the acidity characteristics play a key role. E-info https://repository.uantwerpen.be/docman/iruaauth/bafcae/1ce3f5f3344.pdf http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000329891900046&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000329891900046&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000329891900046&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle