In-situ preparation of functionalized molecular sieve material and a methodology to remove template

Rekha Yadav; Maqsood Ahmed; Arvind Kumar Singh; Ayyamperumal Sakthivel

doi:10.1038/srep22813

In-situ preparation of functionalized molecular sieve material and a methodology to remove template

Sci Rep. 2016 Mar 10:6:22813. doi: 10.1038/srep22813.

Authors

Rekha Yadav¹, Maqsood Ahmed¹, Arvind Kumar Singh¹, Ayyamperumal Sakthivel¹

Affiliation

¹ Inorganic Materials &Catalysis Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India.

Abstract

A series of diaminosilane-functionalized silicoaluminophosphate molecular sieve (SAPO-37) was prepared by in-situ synthesis, and a novel method was developed for the selective removal of structure directing agent (SDA)/template from the functionalized SAPO-37.The complete removal of the SDA was evident according to FT-IR, TGA, (13)C MAS-NMR and elemental analysis. The developed method was found to be efficient for removal of template from microporous molecular sieve viz., SAPO-37 and can be applied for other microporous molecular sieves such as SAPO-5, SAPO-40, etc. The powder XRD pattern of the template-removed samples showed a highly crystalline SAPO-37 phase. Argentometric titration revealed that more than 90% of diamine functionality exposed on the surface was accessible for catalytic applications. The resultant materials showed promising activity for ring opening of epoxide with aniline to yield β-amino-alcohol.

Publication types

Research Support, Non-U.S. Gov't