摘要
The mesoporous MCM-41 materials with highly connected nanochannels have been obtained from the aluminosilicate-CnTMAX-H2O systems by a delayed neutralization procedure. The N2 adsorption-desorption isotherm of the materials exhibits a large type B hysteresis at p/p0∼ 0.5. The hysteresis effect is dependent on the synthetic condition and the Si/Al ratio. In spite of the chain length of the surfactant, this hysteresis takes place around the same p/p0 value. From the TEM micrographs of the ultrathin section, one can clearly find that these mesoporous materials contain many structure defects, which are irregular shaped and the size distributes between 5.0-30.0 nm. Combining the above two evidences, we interpret the neighboring channels are interconnected through defects in channels walls. The diffusion of molecules inside these highly defective MCM-41 materials becomes more effective. We show that it leads to a better catalyst support material using ethylbenzene dehydrogenation reaction as an illustration.
原文 | 英語 |
---|---|
頁(從 - 到) | 15-22 |
頁數 | 8 |
期刊 | Studies in Surface Science and Catalysis |
卷 | 129 |
DOIs | |
出版狀態 | 已發佈 - 2000 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 催化
- 凝聚態物理學
- 物理與理論化學
- 表面、塗料和薄膜
- 材料化學