脉冲激光法连续制备纳米铁溶胶及其分散稳定性的研究

Preparation and Disperse Stability of Nano-iron/Ethanol Sol Prepared by Pulsed Laser Ablation

提出脉冲激光轰击浸于流动液相中铁靶的新方法,连续制备得到纳米铁乙醇溶胶并采用TEM,FT IR,UV vis对其进行表征.透射电镜发现其粒径分布在 10～ 30nm,傅立叶红外光谱发现乙醇分子基团振动波长受纳米铁颗粒的影响,可见-紫外光谱的分析结果表明其在 2 37 82nm,2 72 93nm,30 8 43nm处附近有吸收.通过UV vis及TEM研究了添加十二烷醇聚氧乙烯醚(OP 10 )对纳米铁溶胶的分散稳定性的影响.结果表明,加入 0 10

A novel method for successive preparation of nano metal sols by pulsed laser ablation at the interface of solid and flowing-liquid is developed and nano-iron/ethanol sol is obtained by this method. TEM results show that the iron particles' sizes are mostly between 10 similar to 30 nm. It is found through FT-IR that the vibration of ethanol molecule groups in the sol is affected by the nano-iron particles. The UV-vis results show that there are one strong absorption peak at 237.82 nm and two medium absorption peaks at 272.93 nm and 308.43 nm. The effect of polyoxyethylene (10) lauryl ether (OP-10) on the disperse stability of nano-iron/ethanol sol is studied by UV-vis and TEM The results show that the best addition of OP-10 is 0. 10% and it can effectively stabilize the dispersity of the nano-iron/ ethanol sol.