Synthesis Mechanism of Cationic Surfactant Templating Mesoporous Silica under an Acidic Synthesis Process

Content Provider	Semantic Scholar
Author	Che, Shunai Li, Huachun Lim, Sunghyun Sakamoto, Yasuhiro Terasaki, Osamu Tatsumi, Takashi
Copyright Year	2005
Abstract	The presence of various counteranions in the interfacial region of the silicate−surfactant mesophase introduces opportunities for manipulation of the phase structure. Well-ordered three-dimensional hexagonal P63/mmc, cubic Pm3n, two-dimensional hexagonal p6mm, and cubic Ia3d mesoporous materials have been synthesized with the same surfactant (cetyltriethylammonium bromide), depending on the kind of acids. The counteranions of acidic media have resulted in increasing surfactant packing parameter g in the order SO42- < Cl- < Br- < NO3-, which leads to different formation routes to the mesostructures. It has been found that the mesophases are always transformed from the lower curvature one into the higher curvature one in the acidic synthesis gel. The combination of X-ray diffraction patterns, scanning electron microscope images, and high-resolution transmission electron microscope images presented visible evidence for the mesostructural constructions. In particular, the synthesis of a cubic Pm3n mesoporo...
Starting Page	4103
Ending Page	4113
Page Count	11
File Format	PDF HTM / HTML
DOI	10.1021/cm050359s
Alternate Webpage(s)	http://canli.dicp.ac.cn/wp-content/uploads/articles-of-group-seminars/050917licongming.pdf
Alternate Webpage(s)	https://doi.org/10.1021/cm050359s
Volume Number	17
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article