Thermogravimetric Investigations During the Synthesis of Silica-based MCM-41

被引:0
作者
S. A. Araujo
M. Ionashiro
V. J. Fernandes
A. S. Araujo
机构
[1] UNESP,Institute of Chemistry
[2] Federal University of Rio Grande do Norte,Department of Chemistry
来源
Journal of Thermal Analysis and Calorimetry | 2001年 / 64卷
关键词
hydrothermal synthesis; MCM-41; thermogravimetry;
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学科分类号
摘要
MCM-41 material was synthesized starting from hydrogel containing colloidal fumed silica, sodium silicate, cetyltetramethylammonium bromide(CTMABr) as surfactant, and distilled water as solvent. These reactants were mixed to obtain a gel with the following composition: 4SiO2:1Na2O:1CTMABr:200H2O. The hydrogel with pH=14 was hydrothermally treated at100°C, for 4 days. Each day, the pH was measured, and then adjusted to 9.5–10 by using 30%acetic acid solution. Thermogravimetry was the main technique, which was used to monitor the participation of the surfactant on the MCM-41 nanophase, being possible to determine the temperature ranges relative to water desorption as well as the surfactant decomposition and silanol condensation.
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页码:801 / 805
页数:4
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