''Tubules-within-a-tubule'' hierarchical order of mesoporous molecular sieves in MCM-41

被引：326

作者：

Lin, HP ^{[1
]}

Mou, CY ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT CHEM,TAIPEI 10764,TAIWAN

来源：

SCIENCE | 1996年 / 273卷 / 5276期

关键词：

D O I：

10.1126/science.273.5276.765

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The recently discovered mesoporous aluminosilicate MCM-41 consists of hexagonal arrays of nanometer-sized cylindrical pores. It is shown that this material can be synthesized by cooperative condensation of silicate and cylindrical cation ic micelles. Careful control of the surfactant-water content and the rate of condensation of silica at high alkalinity resulted in hollow tubules 0.3 to 3 micrometers in diameter. The wall of the tubules consisted of coaxial cylindrical pores, nanometers in size, that are characteristic of those of MCM-41. The formation of this higher order structure may take place through a liquid crystal phase transformation mechanism involving an anisotropic membrane-to-tubule phase change. The hierarchical organization of this ''tubules-within-a-tubule'' particle texture is similar to that of the frustules of marine diatoms.

引用

页码：765 / 768

页数：4

共 23 条

[1] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES [J].