Abstract
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.
Original language | English |
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Pages (from-to) | 375-378 |
Number of pages | 4 |
Journal | Journal of the Chinese Chemical Society |
Volume | 43 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1996 |
Externally published | Yes |
Keywords
- Delayed neutralization
- MCM-41
- Mesoporous materials
ASJC Scopus subject areas
- General Chemistry