微反应器制备纳米氢氧化镍的研究

以乙酸镍溶液和氢氧化钾溶液为原料,采用微反应器技术对制备纳米氢氧化镍进行了研究,实验中考察了反应物浓度、流速和反应温度对纳米氢氧化镍颗粒粒径的影响,并通过ZetasizerNano-ZS90激光粒度测定仪、D/MAX-2500X型XRD和SEM-4800-I型场发射扫描电镜分别对产品进行了表征。结果表明,制得的纳米氢氧化镍的粒径分布较窄,且平均粒径随反应物浓度提高而增大,随流速增大而减小,随反应温度的升高而增大。在室温条件下,乙酸镍溶液浓度为0.2mol/L,流速为8.68m/s时制得了近似球形形状、平均粒径为29nm,粒度分布窄的氢氧化镍纳米颗粒。

Preparation of nano-sized nickelous hydroxide with microreactor

Nano nickelous hydroxide is prepared from nickelous acetate solution and ploassium hydroxide solution with a self-made micro-reactor in this paper.The influence of operation conditions,including concentration,flow rate and temperature,on the particle size distribution of nickelous hydroxide are investigated,and the optimal conditions are obtained.The products are characterized with Zetasizer Nano-ZS90 particle size analyzer from Malvern company,D/MAX-2500X XRD from Rigaku company and S-4800-I SEM from Hitachi company.The experimental results show that the particle size distribution is narrow,and the particle size increases with the increase of reactant concentration,decreases with the increase of flow velocity in micro-channel,and increases with the increase of reaction temperature.Sphereelike nano nickelous hydroxide with average particle size of 29 nm and narrow partlicle size distribution is prepared under room temperature,with the concentration of nickelous acetate solution 0.2 mol/L and flow velocity in micro-channel 8.68 m/s.