植物还原法制备钯纳米单质的定量研究

摘要

Using PdCl2 as Pd particle precursor and ginkgo biloba extract as reducing agent,nano Pd particles from PdCl2 solution were obtained by plant reduction method.The residual Pd2+ ion concentration in the reaction solution was measured by inductively coupled plasma atomic emission spectrometry (ICP-AES)to calculate quantitatively the reduction rate of the reaction.The effects of PdCl2 concentration and particle size of ginkgo leaf dry powder on the reduction rate of Pd2+ were investigated.The results showed that ICP-AES could be used to quantitatively study the plant reduction method,and that the higher the concentration of PdCl2,the smaller the dry powder particles,the higher the reduction rate.%采用植物还原法,以PdCl2为钯前躯体,以银杏叶提取液为还原剂,将pd2+从PdCl2溶液中还原出来,制备钯纳米单质.用电感耦合等离子体原子发射光谱(ICP-AES)方法测定溶液中残留的Pd2+浓度,计算反应的还原率,完成对植物还原法制备纳米单质的定量研究.分别考察了钯前躯体PdCl2浓度和银杏叶干粉颗粒大小对pd2+还原率的影响.结果表明:可以用ICP-AES方法对植物还原法制备钯钠米单质的反应进行定量研究;PdCl2浓度越大、银杏叶干粉颗粒越小,还原率越大.