کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
76535 | 49142 | 2007 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Morphologically controlled synthesis of mesoporous alumina Morphologically controlled synthesis of mesoporous alumina](/preview/png/76535.png)
The morphologically controlled synthesis of mesoporous alumina using Al(NO3)3/NH3/urea/surfactant reaction system is demonstrated. Both the mesostructures and morphologies of the resulting alumina can be effectively controlled via adjusting the synthesis parameters, including reactant compositions, surfactant kinds and hydrothermal conditions. With the aid of surfactants, mesoporous alumina with spheres, rods, fibers and three-dimensional dumbbell, flower-like hierarchical superstructures on the microscopic scale has been obtained. Through characterization by N2 physisorption, X-ray diffraction, electron microscopy and thermogravimetry analysis, the effects of synthesis conditions on structures and shapes of products are explained and the possible formation mechanism of the controlled morphologies is also proposed.
Journal: Microporous and Mesoporous Materials - Volume 100, Issues 1–3, 23 March 2007, Pages 35–44