Fabrication of MCM-41 mesoporous silica through the self-assembly supermolecule of β-CD and CTAB |
| |
Authors: | Zhaodong Nan Xia Xue Xin Yan |
| |
Affiliation: | a College of Chemical Science, Qufu Normal University, Qufu 273165, People's Republic of China b Key Lab of Colloid and Interface Chemistry of the State Education Ministry, Shandong University, Jinan 250100, People's Republic of China |
| |
Abstract: | Using the self-assembly β-cyclodextrin (β-CD) and cetyltrimethylammonium bromide (CTAB) as structure-directing agents, high-quality ordered MCM-41 silicas have been prepared. Small-angle X-ray diffraction (SXRD), N2 adsorption-desorption and scanning electron microscope (SEM) techniques were used to characterize the calcined samples. Results showed that the pore structure of the resulting mesoporous silica belonged to the two-dimensional hexagonal structure (space group p6mm). The high-quality hexagonal structure was formed as n?1 (n denotes molar ratio of β-CD to CTAB). N2 adsorption-desorption curves revealed type IV isotherms, H4 hysteresis loops, for all samples, and H1 hysteresis loops for samples at n=0, 0.1, 1 and 2, respectively. The pore size and the pore wall thickness of the samples increased with the increase in n values, respectively. |
| |
Keywords: | Mesoporous silica MCM-41 Self-assembly CTAB β-CD |
本文献已被 ScienceDirect 等数据库收录! |
|