Micrometer-Sized Mesoporous Silica Spheres Grown帮翻译下

Introduction The discovery of the M41S family of mesoporous silicas1，2 has stimulated wide interest in the surfactanttemplated synthesis of mesoporous materials because of their potential applications as versatile catalysts， catalyst s... Introduction
The discovery of the M41S family of mesoporous
silicas1，2 has stimulated wide interest in the surfactanttemplated
synthesis of mesoporous materials because
of their potential applications as versatile catalysts，
catalyst supports， separation media， and hosts for
clusters and nanowires. Mesoporous silica molecular
sieves have been prepared by ionic1-4 and neutral5，6
surfactant templating pathways; however， the obtained
mesoporous silicas normally yield irregular agglomerates
consisting of a wide particle size distribution.7
Because the control of the particle morphology and size
of mesoporous silicas could open up new possibilities for
the application of mesoporous silicas as a packing
material in chromatography or as an easy-to-handle
form for catalytic purposes， some recent efforts have
been devoted to the synthesis of mesoporous silica
spheres of defined size. For example， millimeter-sized
mesoporous silica spheres ranging from 0.1 to 2 mm in
size8 and submicrometer-sized mesoporous silica spheres
ranging from 0.4 to 1.1 ím in size9 have been synthesized
under stirred basic conditions by modified cationic
surfactant templating routes. However， further efforts
are required toward the synthesis of micrometer-sized
mesoporous silica spheres， which could be directly used
in high-performance liquid chromatography (HPLC) and
related separation techniques.9