ABSTRACT
We report an economic method for synthesis of highly ordered silica with a mixing surfactant system containing short-chain cationic surfactant (decyltrimethyl ammonium bromide, denoted C10TMAB) and short-chain anionic surfactant (sodium octyl sulfate, denoted SOS) as the templating agents. Highly ordered supermicroporous silica was synthesized by judiciously chosen mixing ratio of surfactants. The samples were characterized by small-angle X-ray diffraction, transmission electron microscopy, and N2 adsorption-desorption. The results showed that the pore structure of the resulting silica belongs to the two-dimensional hexagonal structure (space group 2D-p6mm) with a pore size of ca. 2.2nm. Moreover, the method proposed herein is expected to facilitate the synthesis of not only porous silicas but also materials with other framework compositions.
Subject(s)
Costs and Cost Analysis , Silicon Dioxide/chemical synthesis , Microscopy, Electron, Transmission , Powder Diffraction , Scattering, Small AngleABSTRACT
In the title water-solvated salt, C(21)H(22)P(+)·Br(-)·H(2)O, the ionic components are linked by short C-Hâ¯Br contacts along the a-axis direction. The two half occupied water mol-ecules are connected to each other by strong O-Hâ¯O hydrogen bonds and they are also linked to the bromide anion by short O-Hâ¯Br contacts.
