脉冲激光法连续制备纳米钴乙醇溶胶的研究

纳米钴因其优异的磁性能在磁记录材料 [1]、超顺磁材料 [2 ]、巨磁材料 [3 ]和雷达吸波 [4 ]方面具有重要应用 .金属钴有面心立方、密排六方和非晶态 3种结构 [5] .目前 ,用等离子加热及碳电弧法制备的纳米钴粉基本上都是面心立方结构 [6] .Gibson等 [7]用超声化学方法获得了密

Studies on Nano-cobalt/Ethanol Sol Prepared by Pulsed Laser Ablation

A novel nano-cobalt/ethanol sol was firstly obtained by pulsed laser ablation on the interface of solid and flowing-liquid. TEM results show that nano-cobalt particles size is about 30 nm. Electronic diffraction and XRD analysis both indicate that the nano-cobalt is non-crystalline. It was found that the stretching vibration of associating hydroxyl(γOH) and the deformation vibration of C-H in ethanol are strengthened, but stretching vibration of γC-O in primary hydroxyl of ethanol is restrained through the FTIR spectrum. The UV-Vis results show that there are one strong absorption peak at 231.99 nm due to primary nano-cobalt particles and two medium absorption peaks at 273.00 and 308.56 nm due to quantum confine effect.