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;

D O I：

暂无

中图分类号：

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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