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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)15-22
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume129
Publication statusPublished - 2000 Jan 1

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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