Jha Himendra, Kikuchi Tatsuya, Sakairi Masatoshi, Takahashi Hideaki
Laboratory of Interface Microstructure Analysis (LIMSA), Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
Nanotechnology. 2008 Oct 1;19(39):395603. doi: 10.1088/0957-4484/19/39/395603. Epub 2008 Aug 11.
A novel method for the synthesis of aluminum oxy-hydroxide nanofibers from a porous anodic oxide film of aluminum is demonstrated. In the present method, the porous anodic alumina not only acts as a template, but also serves as the starting material for the synthesis. The porous anodic alumina film is hydrothermally treated for pore-sealing, which forms aluminum oxy-hydroxide inside the pores of the oxide film as well as on the surface of the film. The hydrothermally sealed porous oxide film is immersed in the sodium citrate solution, which selectively etches the porous aluminum oxide from the film, leaving the oxy-hydroxide intact. The method is simple and gives highly uniform aluminum oxy-hydroxide nanofibers. Moreover, the diameter of the nanofibers can be controlled by controlling the pore size of the porous anodic alumina film, which depends on the anodizing conditions. Nanofibers with diameters of about 38-85 nm, having uniform shape and size, were successfully synthesized using the present method.
展示了一种从铝的多孔阳极氧化膜合成羟基氧化铝纳米纤维的新方法。在本方法中，多孔阳极氧化铝不仅充当模板，还作为合成的起始材料。对多孔阳极氧化铝膜进行水热处理以进行孔密封，这在氧化膜的孔内以及膜表面形成羟基氧化铝。将水热密封的多孔氧化膜浸入柠檬酸钠溶液中，该溶液选择性地蚀刻膜中的多孔氧化铝，使羟基氧化物保持完整。该方法简单，可得到高度均匀的羟基氧化铝纳米纤维。此外，纳米纤维的直径可以通过控制多孔阳极氧化铝膜的孔径来控制，而孔径取决于阳极氧化条件。使用本方法成功合成了直径约为38 - 85纳米、形状和尺寸均匀的纳米纤维。
