植物还原法制备钯纳米单质的定量研究

QUANTITATIVE STUDY ON PREPARATION OF PALLADIUM NANOPARTICLES BY PLANT REDUCTION METHOD

采用植物还原法,以PdCl_2为钯前躯体,以银杏叶提取液为还原剂,将Pd^(2+)从PdCl_2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Pd^(2+)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PdCl_2浓度和银杏叶干粉颗粒大小对Pd^(2+)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;PdCl_2浓度越大、银杏叶干粉颗粒越小,还原率越大。

Using PdCl 2 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 Pd 2+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 Pd 2+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.