Hydrothermal Synthesis and Optical, Magnetic, and Supercapacitance Properties of Nanoporous Cobalt Oxide Nanorods
Hydrothermal Synthesis and Optical, Magnetic, and Supercapacitance Properties of Nanoporous Cobalt Oxide Nanorods
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DOI：
10.1021/jp8106149
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发表时间：
2009-03-19
影响因子：
3.7
通讯作者：
Yao, Jane
中科院分区：
文献类型：
--
作者：
Wang, Guoxiu;Shen, Xiaoping;Yao, Jane
采用水热法制备了多孔氧化钴纳米棒。透射电镜分析表明，单个Co(3)O(4)纳米棒具有纳米孔结构，由纳米晶体的织构聚集体组成。采用拉曼光谱和紫外-可见光谱对Co(3)O(4)纳米棒的光学性质进行了表征。磁性能测试表明，Co(3)O(4)纳米棒具有35 K的低尼尔转变温度。我们观察到纳米多孔Co(3)O(4)纳米棒的交换偏置非常明显，表明Co(3)O(4)纳米棒中纳米晶体之间存在磁耦合。作为超级电容器的电极材料，Co(3)O(4)表现出280 F/g的高电容。
Nanoporous cobalt oxide nanorods were synthesized by a hydrothermal method. Transmission electron microscopy analysis showed that the individual Co(3)O(4) nanorods have a nanoporous structure, consisting of the textured aggregations of nanocrystals. Optical properties Of Co(3)O(4) nanorods were characterized by Raman and UV-vis spectroscopy. Magnetic property measurement shows that Co(3)O(4) nanorods have a low Neel transition temperature of 35 K. We observed quite significant exchange bias for nanoporous Co(3)O(4) nanorods, indicating the existence of magnetic coupling between the nanocrystals in Co(3)O(4) nanorods. When applied as electrode materials in supercapacitors, Co(3)O(4) demonstrated a high capacitance of 280 F/g.