Wu Xufeng, Bai Hua, Zhang Jiaxin, Chen Feng'en, Shi Gaoquan
Department of Chemistry and Bio-organic Phosphorous Laboratory, Tsinghua University, Beijing 100084, People's Republic of China.
J Phys Chem B. 2005 Dec 8;109(48):22836-42. doi: 10.1021/jp054350p.
Cu(OH)2 nanoneedle and nanotube arrays were electrochemically synthesized by anodization of a copper foil in an aqueous solution of KOH. The nanoneedles and nanotubes were constructed from nanosheets of Cu(OH)2. Controlling the electrochemical conditions can qualitatively modulate the lengths, amounts, and shapes of Cu(OH)2 nanostructures. The composition of as-prepared Cu(OH)2 nanostructures has been confirmed by X-ray diffraction and select-area electron diffraction. The influences of the KOH concentration of the aqueous electrolyte, the reaction temperature, and current density on the morphology of Cu(OH)2 nanostructures were investigated, and the formation mechanism of the nanostructures is discussed. Furthermore, Cu(OH)2 nanoneedles can be successfully transformed to CuO nanoneedles with little morphology change by heating. This work developed a simple, clean, and effective route for fabrication of large area Cu(OH)2 or CuO nanostructured films.
通过在氢氧化钾水溶液中对铜箔进行阳极氧化，电化学合成了氢氧化铜纳米针和纳米管阵列。纳米针和纳米管由氢氧化铜纳米片构成。控制电化学条件可以定性地调节氢氧化铜纳米结构的长度、数量和形状。通过X射线衍射和选区电子衍射证实了所制备的氢氧化铜纳米结构的组成。研究了水性电解质中氢氧化钾浓度、反应温度和电流密度对氢氧化铜纳米结构形貌的影响，并讨论了纳米结构的形成机理。此外，通过加热，氢氧化铜纳米针可以成功地转化为形貌变化很小的氧化铜纳米针。这项工作为大面积氢氧化铜或氧化铜纳米结构薄膜的制备开发了一种简单、清洁且有效的方法。
