The synthesis and characterization of mesoporous molecular sieves MCM-41 with interconnected channels

Hong Ping Lin, She Tin Wong, Shang Bing Liu, Chung Yuan Mou, Chih Yuan Tang

研究成果: 雜誌貢獻文章同行評審

6 引文 斯高帕斯(Scopus)

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
129
DOIs
出版狀態已發佈 - 2000
對外發佈

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

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