摘要
A new process to synthesize thermally stable mesoporous molecular sieves of MCM-41 structure based on delayed neutralization at ambient temperature was investigated. All samples synthesized by this new method have BET surface areas of about 1100 m2/g and possess high thermal stability up to 900 °C. Higher crystallinity and less lattice constriction after calcination were observed for samples with a longer aging period. Those samples with aging time longer than 10 days exhibited four characteristic XRD peaks of MCM-41 both before and after calcination at 560 °C. The N2 adsorption-desorption isotherms of the calcined samples showed larger average pore size and more homogenous pore size distribution. The method was also successfully applied to the synthesis of MCM-41 with different surfactants of hydrocarbon length with 10-18 carbons and proves to be a simple route for obtaining thermally stable MCM-41 at room temperature.
原文 | English |
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頁(從 - 到) | 375-378 |
頁數 | 4 |
期刊 | Journal of the Chinese Chemical Society |
卷 | 43 |
發行號 | 5 |
DOIs | |
出版狀態 | Published - 1996 1月 1 |
All Science Journal Classification (ASJC) codes
- 化學 (全部)