| 초록 |
Nanoporous materials, obtained by the favorable self-assembly between organic templates and inorganic precursors, have opened many new possibilities for applications in catalysis, separation, and nano-science due to their large, controllable pore sizes, high surface areas and easy functionalization. However, the synthesis of nanoporous metal oxides has been less successful compared with those of silica materials. One difficulty lies in a facile crystallization of most metal oxides, accompanied by structural collapse, during the nanostructure formations and the removal of organic templates. Here, we describe a new type of Gemini surfactant containing siloxane moiety, which can yield highly stable nanoporous metal oxides after the removal of the surfactant via the nano-propping pathway. The siloxane moiety is believed to play an important nano-propping role during the surfactant removal by direct calcination, yielding thermally stable nanoporous metal oxides. |
