Pd负载电纺碳纳米纤维的制备及其催化活性  

Preparation and characterization of electrospun carbonized nanofibers containing Pd nanoparticles

作　　者：陈丽萍[1,2] 李永红[3] 张和安[2] 洪三国[3,2] 侯豪情[3] 

机构地区：[1]华东交通大学基础学院,江西南昌330013 [2]南昌大学理学院,江西南昌330031 [3]江西师范大学化学化工学院,江西南昌330022

出　　处：《化学试剂》2009年第7期481-483,486,共4页Chemical Reagents

基　　金：江西省教育厅重大科技项目(2006-109);江西省教育厅科技项目(2007-126)

摘　　要：Pd纳米粒子负载的碳纳米纤维是催化Sonogahira偶合反应的良好催化剂,其高长径比使之易于从反应混合物中过滤分离;金属纳米粒子与碳纤维间的强相互作用使其具有良好的多次重复使用性。通过电纺丝技术和碳化技术制备了Pd金属纳米粒子负载的电纺碳纳米纤维,透射电镜观察显示最终碳化温度及在该温度下的停留时间是影响钯纳米粒子尺寸及其在纤维中分布的主要因素。并通过所得复合纳米纤维对Sonogahira偶合反应的催化活性研究,发现475～575℃这一温度范围是制备具有良好催化活性的金属钯纳米粒子负载的碳纳米纤维的最佳的碳化温度段。Pd nanoparticles-loaded carbon nanofibers are used as the excellent catalyst for the Sonogahira coupling reaction. Because of their high aspect ratio, such catalysts will be easily separated from the reaction mixture;also, these catalysts have a good reusabihty due to the finn binding between the cartier and the supported species. In this paper, the Pd nanoparficles-loaded electrospun carbon nanofibers （Pd-NP/CENFs） were made via the electrospinning and carbonization processes. Transmission electron microscope was used to observe the as-prepared Pd-NP/ CENFs, the catalytic activities of which were tested via the Sonogahira coupling reaction. The test results showed that the final carbonization temperature and annealing time were the main factors for controlling the Pd particle size and their distribution on the nanofibers. The tempemtare ranging from 475 ℃ to 575 ℃ was the optimized temperature for making the Pd-NP/CENF catalyst with higher catalytic activities.

关 键 词：电纺丝 纳米纤维 PD纳米粒子 催化剂 

分 类 号：O643.36[理学—物理化学]