Abstract
Mesoporous silica with a novel structure (FDU-11) has been prepared for the first time by using a rigid bolaform tetra-head-group quaternary ammonium surfactant: [(CH3)3NCH2CH2CH 2N(CH3)2CH2(CH2) 11OC6H4C6H4O(CH 2)11CH2N(CH3)2CH 2CH2CH2N (CH3)3] 4+·4Br- under an alkaline condition. X-ray diffraction (XRD) and transmission electron microscope (TEM) studies show that the mesoporous silica FDU-11 may have a low symmetric tetragonal mesostructure with P4/mmm space group. N2 sorption isotherms show that calcined mesoporous silica FDU-11 has the BET surface area of 281 m2/g, pore size of 2.05 nm and the pore volume of 0.36 cm3/g. A phase transformation from FDU-11 into another unknown mesoporous silica structure by a hydrothermal treatment is observed, suggesting the intermediate nature of the FDU-11 mesophase.
| Original language | English |
|---|---|
| Pages (from-to) | 528-532 |
| Number of pages | 5 |
| Journal | Studies in Surface Science and Catalysis |
| Volume | 154 A |
| DOIs | |
| State | Published - 2004 |
| Externally published | Yes |
Keywords
- Mesoporous silica
- Structure
- Surfactant
- Synthesis