EFFECT OF FUNCTIONALIZATION CONDITIONS ON LOADINGS OF 3-(TRIMETHOXYSILYL)-1-PROPANOLTHIOL IN HEXAGONAL MESOPOROUS SBA-15
Abstract
Thiol-functionalized SBA-15 silicas have been directly synthesized by cocondensationof tetraethyl orthosilicate (TEOS) and 3-(trimethoxysilyl)-1-propanolthiol(TSPT) under hydrothermal condition. Mesoporous structure was obtained after thesurfactant removal by Soxhlet and reflux ethanol extraction. These materials werecharacterized by means of powder X-ray diffraction, isotherms of nitrogenadsorption/desorption, thermal analysis, infrared spectroscopy and energy-dispersive X-rayspectroscopy. The initial molar ratio of TEOS to TSPT, the time of adding TSPT tosynthesize gel and the Soxhlet and reflux ethanol extraction to obtain thiol-functionalizedSBA-15 silicas with high thiol content and highly ordered hexagonal mesostructure werediscussed.References
D.Y. Zhao, J. Feng, Q. Huo, N. Melosh, G.H. Fredrickson, B.F. Chmelka, G.D. Stucky,
Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom
Pores, Science 279 (1998), 548.
C.G. Goltner, S. Henke, M.C. Weissenberger, M. Antonietti, Mesoporous Silica from
Lyotropic Liquid Crystal Polymer Templates, Angew. Chem. Int. Ed. 37 (1998), 613-
J.B. Rosenholm, H. Rahiala, J. Puputti, V. Stathopolous, P. Pomonis, I. Beurroies, K.
Backfolk, Characterization of Al- and Ti-modified MCM-41 using adsorption
techniques, Colloids Surf. A: Physicochem. Eng. Aspects 250 (2004), 289-306.
X. Feng, G.E. Fryxell, L.Q. Wang, A.Y. Kim, J. Liu, K.M. Kemner, Functionalized
Monolayers on Ordered Msesoporous Supports, Science 276 (1997), 923-926.
X. Liang, Y. Xu, G. Sun, L. Wang, Y. Sun, X. Qin, Preparation, characterization of
thiol-functionalized silica and application for sorption of Pb2+ and Cd2, Colloids and
Surfaces A: Physicochem. Eng. Aspects 349 (2009), 61-68.
S. Che, A.E. Garcia-Bennett, X. Liu, R.P. Hodgkins, P.A. Wright, D. Zhao, O. Terasaki,
T. Tatsumi, Synthesis of Large-Pore Ia d Mesoporous Silica and Its Tubelike Carbon
Replica, Angew. Chem. Int. Ed. 42 (2003), 3930-3934.
D. Zhao, Q. Huo, J. Feng, B.F. Chmelka, G.D. Stucky, Nonionic Triblock and Star
Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered,
Hydrothermally Stable, Mesoporous Silica Structures, J. Am. Chem. Soc. 1998, 120,
-6036.
A.S. Maria Chong, X.S. Zhao, Functionalized nanoporous silicas for the
immobilization of penicillin acylase, Applied Surface Science 237 (2004), 398–404.
A. Sayari, S. Hamoudi, Periodic Mesoporous Silica-Based Organic-Inorganic
Nanocomposite Materials, Chem. Mater. 13 (2001), 3151– 3168.
Q. Wei, Z. Nie, Y. Hao, Z. Chen, J. Zou, W. Wang, Direct synthesis of thiol-ligandsfunctionalized
SBA-15: Effect of 3-mercaptopropyltrimethoxysilane concentration on
pore structure, Mater. Letters 59 (2005), 3611 – 3615.
