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Preparation of High‐Quality MCM‐48 Mesoporous Silica and the Mode of Action of the Template
Author(s) -
Zhang Kun,
Yuan EnHui,
Xu LangLang,
Xue QingSong,
Luo Chen,
Albela Belén,
Bonneviot Laurent
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200316
Subject(s) - thermogravimetric analysis , high resolution transmission electron microscopy , mesoporous material , mcm 41 , pulmonary surfactant , calcination , fourier transform infrared spectroscopy , chemical engineering , materials science , adsorption , transmission electron microscopy , mesoporous silica , analytical chemistry (journal) , chemistry , nanotechnology , chromatography , organic chemistry , catalysis , engineering
Ultrastable MCM‐48 silica with Ia 3 d cubic structure was synthesized by using only the surfactant cetyltrimethylammonium tosylate (CTATos) as template at extremely low surfactant concentration (CTATos/SiO 2 = 0.068). Characterization by small‐angle X‐ray diffraction (XRD), nitrogen adsorption, and high‐resolution transmission electron microscopy (HRTEM) clearly shows that the obtained MCM‐48 silica has a highly ordered structure and large surface area (ca. 1281 m 2 /g) and pore volume (ca. 1.07 cm 3 /g). The regular cubic arrays were well retained even after this material was calcined at a high temperature of 900 °C for 3 h or heated at reflux in boiling water for 12 h. The Fourier transform infrared (FTIR) spectrum, thermogravimetric analysis (TG), and chemical analysis provide strong evidence that the formation of MCM‐48 is attributed to the retention of tosylate (Tos – ) counteranions of the surfactant in the interface between surfactant and silicate. The current synthetic strategy is suitable for routine and large‐scale preparations of mesoporous silica with different topological structures.