نتایج جستجو برای: modified zeolites

تعداد نتایج: 255306  

Journal: :Dalton transactions 2014
Lei Chen Bing Yan

Both zeolite A/L and SBA-15 have been used to assemble novel photofunctional multi-component lanthanide hybrid materials. Microporous zeolites A/L are first functionalized by embedding lanthanide or zinc complexes (TTA = thenoyltrifluoroacetone, TAA = trifluoroacetone, bipy = 2,2'-bipyridyl) into the pores of zeolite A/L, and then the surface of functionalized zeolite A/L is modified via covale...

Journal: :Chemical Society reviews 2015
Pavla Eliášová Maksym Opanasenko Paul S Wheatley Mariya Shamzhy Michal Mazur Petr Nachtigall Wieslaw J Roth Russell E Morris Jiří Čejka

A novel methodology, called ADOR (assembly-disassembly-organisation-reassembly), for the synthesis of zeolites is reviewed here in detail. The ADOR mechanism stems from the fact that certain chemical weakness against a stimulus may be present in a zeolite framework, which can then be utilized for the preparation of new solids through successive manipulation of the material. In this review, we d...

Journal: :BIO web of conferences 2021

On the basis of granular synthetic zeolites NaY, HY, and ZSM-5, adsorbents containing nanoparticles silver, cobalt, molybdenum, tungsten were obtained. The samples have a lower surface polarity in comparison with initial zeolites, which is reflected selectivity number respect to argon. This due fact that argon molecule interacts only through nonspecific forces. Modification was performed by int...

Journal: :Accounts of chemical research 2003
J Sivaguru Arunkumar Natarajan Lakshmi S Kaanumalle J Shailaja Sundararajan Uppili Abraham Joy V Ramamurthy

In this Account strategies using zeolites as media to achieve chiral induction are presented. Diastereomeric excesses as high as 90% and enantiomeric excesses up to 78% have been obtained with selected systems within zeolites. The same systems show no asymmetric induction in solution. Chiral induction is dependent on the alkali ions present in the zeolites. Alkali ions control not only the exte...

Journal: :Journal of visualized experiments : JoVE 2016
Paul S Wheatley Jiří Čejka Russell E Morris

Zeolites are an important class of materials that have wide ranging applications such as heterogeneous catalysts and adsorbents which are dependent on their framework topology. For new applications or improvements to existing ones, new zeolites with novel pore systems are desirable. We demonstrate a method for the synthesis of novel zeolites using the ADOR route. ADOR is an acronym for Assembly...

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