Facile synthesis and characterization of macro–mesoporous γ-Al2O3
Facile synthesis and characterization of macro–mesoporous γ-Al2O3
复制标题
DOI：
10.1016/j.colsurfa.2010.09.022
复制
发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Mingzhu Liu;Huaming Yang
中科院分区：
文献类型：
--
作者：
Mingzhu Liu;Huaming Yang
通过一种简便的方法合成了高度有序的大孔介孔γ-Al_2O_3。用氮气孔度仪、粉末X射线衍射仪、透射电子显微镜和固态魔角旋转核磁共振对样品进行了表征。结果表明，合成的多孔γ-Al_2O_3具有较大的比表面积，约为320m~2/g，两个规整的孔网络集中在约30 nm和70 nm处。大孔-介孔网络共存导致的五配位Al含量较高，预示着其作为多相催化剂具有潜在的应用前景。提出了大介孔γ-Al_2O_3形成的一般机理。
Highly ordered macro–mesoporous γ-Al2O3was synthesized via a facile route. The samples were characterized by N2porosimetry, powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and solid-state magic angle spinining nuclear magnetic resonance (MAS NMR). The results showed that the synthesized porous γ-Al2O3had a larger specific surface area of ca. 320m2/g with two well-defined pore networks concentrated at ca. 30nm and 70nm. Higher content of five-coordinated Al induced by the coexistence of macro–mesoporous network indicated a potential application as heterogeneous catalyst. A general mechanism for the formation of macro–mesoporous γ-Al2O3is also proposed.