Mesoporous material Al-MCM-41 from natural halloysite |
| |
| Authors: | Yaling Xie Yi Zhang Jing Ouyang Huaming Yang |
| |
| Institution: | 1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
2. Research Center for Mineral Materials, Central South University, Changsha, 410083, China
|
| |
| Abstract: | Aluminum-containing hexagonally ordered mesoporous silica (Al-MCM-41) with specific surface area of 509.4 m2/g was first synthesized using natural halloysite as source material by hydrothermal treatment, without addition of silica or aluminum regents. The samples were characterized by X-ray diffraction, transmission electron microscopy, N2 adsorption–desorption measurements, and Fourier transform infrared spectra techniques. The results indicate that process parameters, including calcination temperature, pH value, n(SiO2)/n(CTAB)/n(H2O) ratio, and hydrothermal reaction time, show moderate effects on the preparation of Al-MCM-41. SiO2/Al2O3 molar ratio could be effectively modulated by the calcination temperature for halloysite. Furthermore, we first clarified the structural evolution from natural halloysite to mesoporous material Al-MCM-41 at the atomic level. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
