合成了具有介孔-大孔双模型分级结构的无定形硅铝催化剂,利用硅和铝核的固体魔角核磁共振谱,考察了合成样品中硅和铝结构上的原子特征。
The amorphous silica-alumina catalysts with hierarchical bimodal mesoporous-macroporous structure were prepared. The structural properties of the samples and the atomic environment of Si and Al were investigated by solid-state MAS NMR spectroscopy.