Department of Inorganic Materials, Central South University, Changsha, Hunan 410083, People's Republic of China.
Dalton Trans. 2012 May 21;41(19):5981-7. doi: 10.1039/c2dt12403c. Epub 2012 Apr 5.
We demonstrated that single-crystalline cobalt monoxide (CoO) hollow spheres and octahedra could be selectively synthesized via thermal decomposition of cobalt(II) acetylacetonate in 1-octadecene solvent in the presence of oleic acid and oleylamine. The morphologies and sizes of as-prepared CoO nanocrystals could be controlled by adjusting the reaction parameters. Cobalt oxide (Co(3)O(4)) hollow spheres and octahedra could also be selectively obtained via calcination method using corresponding CoO hollow spheres and octahedra as precursors. The morphology, size and structure of the final products were investigated in detail by XRD, SEM, TEM, HRTEM, DSC, TG, and XPS. The results revealed that the electrochemical performance of cobalt oxide hollow spheres is much better than that of cobalt oxide octahedra, which may be related to the degree of crystallinity, size, and morphology of cobalt oxides.
我们通过在十八烯溶剂中热分解二乙酰丙酮钴，并使用油酸和油胺作为表面活性剂，选择性地合成了单晶氧化钴（CoO）空心球和八面体。通过调节反应参数，可以控制所制备的 CoO 纳米晶体的形貌和尺寸。通过使用相应的 CoO 空心球和八面体作为前体的煅烧方法，也可以选择性地获得氧化钴（Co3O4）空心球和八面体。通过 XRD、SEM、TEM、HRTEM、DSC、TG 和 XPS 详细研究了最终产物的形貌、尺寸和结构。结果表明，氧化钴空心球的电化学性能明显优于氧化钴八面体，这可能与钴氧化物的结晶度、尺寸和形态有关。
