Universiti Teknologi Malaysia Institutional Repository

Facile synthesis of tunable dendritic fibrous sba-15 (dfsba-15) with radial wrinkle structure

Chong, C. C. and Bukhari, S. N. and Cheng, Y. W. and Setiabudi, H. D. and Teh, L. P. and Jalil, A. A. (2020) Facile synthesis of tunable dendritic fibrous sba-15 (dfsba-15) with radial wrinkle structure. Microporous and Mesoporous Materials, 294 .

Full text not available from this repository.

Official URL: http://www.dx.doi.org/10.1016/j.micromeso.2019.109...

Abstract

In this study, typical mesoporous hexagonal rod-typed SBA-15 was successfully transformed into spherical shape with additional dendrimers, namely Dendritic Fibrous SBA-15 (DFSBA-15) by employing microwave-assisted microemulsion system. Physiochemical properties of DFSBA-15 were greatly influenced by aging temperature, urea/TEOS ratio, co-surfactant types, and aging time. It was found that the co-surfactant types were insignificant in controlling the pore size, while the aging conditions (temperature and time) were significant in controlling the fiber density. The analysis results (XRD, N-2 physisorption, FTIR, and TEM) confirmed the optimal conditions for DFSBA-15 synthesis were at aging temperature of 100 degrees C, urea/TEOS ratio of 0.5, n-butanol as co-surfactant, and aging time of 12 h. The as-synthesized optimized DFSBA-15 was compared with the conventional SBA-15 via XRD, N-2 physisorption, FTIR, CO2-TPD, NH3-TPD, TGA, TEM, and FESEM-EDX. As compared, DFSBA-15 rendered vast accessibility to the adsorption sites, higher basicity (approximate to 86% enhancement) and acidity enhancement), abundant siliceous framework and higher thermal stability (approximate to 19% enhancement), owing to its radially oriented pores which elongated to the outer surface from the nucleus of its sphere. The outcome of this study anticipated the wide applications of DFSBA-15 in catalysis and biomedical fields by revealing the facile protocols of optimal DFSBA-15 synthesis.

Item Type:Article
Uncontrolled Keywords:dendritic fibrous sba-15, morphology transformation, tunable properties
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:88023
Deposited By: Narimah Nawil
Deposited On:30 Nov 2020 13:50
Last Modified:30 Nov 2020 13:50

Repository Staff Only: item control page