三维海胆状薄水铝石(AlOOH)的合成与表征

Synthesis and characterization of ovel 3D urchin-like boehmite(AlOOH) superstructures

在甲醇-水溶液体系中,在无模板剂的情况下,使用无水三氯化铝作为原料,水热合成了由纳米棒自组装成的三维海胆状薄水铝石（AlOOH）超结构.采用XRD、SEM和TEM对其进行了表征,研究结果表明：该海胆超结构是由直径60-80 nm、长度2μm左右的纳米棒自组装而成,形貌规则,分散均匀,其直径为6-8μm,在其形成过程中,定向附着机制起到关键性的作用,推断了纳米棒自组装海胆状超结构的形成机理.

Novel 3D urchin-like AlOOH superstructures were successfully prepared by a template-free hydrothermal synthetic route using anhydrous AlCl3 and H2O as reagents in a methanol-water solution. The synthesized products were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. It is shown that the superstructures consist of AlOOH nanorods growing radially from the cores of the superstructures. The AlOOH nanorods have an average length of 2 μm and diameter of 60-80 nm. The formation mechanism of the 3D urchin-like AlOOH superstructures was discussed, and the oriented attachment was found to play a key role in achieving the 3D urchin-like surperstructures.