Synthesis of amine functionalized mesoporous silicas templated by castor oil for transesterification

Elimbinzi, E, Nyandoro, S, Mubofu, E, Osatiashtiani, A, Manayil, J, Isaacs, M, Lee, A and Wilson, K 2018, 'Synthesis of amine functionalized mesoporous silicas templated by castor oil for transesterification', MRS Advances, vol. 3, no. 38, pp. 2261-2269.


Document type: Journal Article
Collection: Journal Articles

Title Synthesis of amine functionalized mesoporous silicas templated by castor oil for transesterification
Author(s) Elimbinzi, E
Nyandoro, S
Mubofu, E
Osatiashtiani, A
Manayil, J
Isaacs, M
Lee, A
Wilson, K
Year 2018
Journal name MRS Advances
Volume number 3
Issue number 38
Start page 2261
End page 2269
Total pages 9
Publisher Cambridge University Press
Abstract Mesoporous silicas were synthesized via a surfactant-templated sol-gel route using castor oil as the templating agent under acidic medium. The resulting silicas were subsequently amine functionalized with 3-aminopropyltriethoxysilane (NH2-MTS), [3-(2-aminoethylamino)-propyl]trimethoxysilane (NN-MTS), and [3-(diethylamino)propyl]trimethoxysilane(DN-MTS) to introduce surface basicity. Surface physicochemical properties were characterized by field emission gun scanning electron microscopy (FEGSEM), nitrogen porosimetry, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and diffuse reflectance infrared fourier transform spectroscopy (DRIFTS). As-synthesised materials exhibit type IV adsorption-desorption isotherms characteristic of mesoporous structures. Clusters of spherical shaped materials were observed by FEGSEM, suggesting growth of silica occurs within colloidal dispersions. High-resolution N 1s XP spectra and DRIFT spectra confirmed the presence of amine groups in the organo-amine functionalised mesoporous silicas. The amine functionalised mesoporous silicas were active for the transesterification of tributyrin with methanol, with conversion found to increase from NH2-MTS< NN-MTS< DN-MTS.
Subject Catalysis and Mechanisms of Reactions
Catalytic Process Engineering
Keyword(s) catalytic
heterogenous
mesoscale
porosity
sol-gel
DOI - identifier 10.1557/adv.2018.347
Copyright notice Copyright © Materials Research Society 2018
ISSN 2059-8521
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