静电纺丝制备钯负载聚苯胺纳米管及其对水合肼的催化氧化  

Preparation of Polyaniline/Palladium Nanotubes Through Electrospinning and Its Catalytic Oxidation to Hydrazine

作　　者：马小玉[1] 杨健茂[2] 蔡文姝[1] 朱国栋[1] 刘建允[1] Jian-yun MA Xiao-yu YANG Jian-mao CAI Wen-shu ZHU Guo-dong LIU Jian-yun(College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620 Analysis and Test Center ,Donghua University ,Shanghai 201620)

机构地区：[1]东华大学环境科学与工程学院,国家环境保护纺织污染防治工程技术中心,上海201620 [2]东华大学分析测试中心,上海201620

出　　处：《分析科学学报》2017年第1期37-41,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.21105009,21476047);电分析化学国家重点实验室开放课题(No.SKLEAC201205)

摘　　要：在电纺丝聚苯乙烯(PS)纤维上进行苯胺聚合,随后经过聚苯乙烯溶解,获得聚苯胺(PANI)纳米管。PANI纳米管在PdCl2的酸性溶液中浸泡吸附,并用NaBH4还原得到Pd纳米负载的聚苯胺(PANI-Pd)纳米管复合材料。扫描电镜证明PANI纳米管的形成及表面Pd纳米粒子的沉积。以该PANI-Pd复合材料制备PANI-Pd修饰玻碳电极,并采用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了该修饰电极对水合肼的催化氧化。实验发现,PdCl2的浓度影响Pd纳米粒子的沉积及其修饰电极对肼的催化性能,当PdCl2浓度为10mmol/L时,制得的PANI-Pd纳米管修饰电极对水合肼的催化性能最佳。在优化条件下,在0.1mol/L磷酸盐缓冲溶液(pH=7.0)中,水合肼的催化电流与浓度在2.0×10-5~1.0×10-4 mol/L和3.0×10-4~7.0×10-3 mol/L范围内呈良好的线性关系,检测限为2.0×10-6 mol/L。该电极可实际应用于水合肼的检测。Polyaniline nanotubes（PANI）was fabricated by polymerization of aniline on electrospun polystyrene（PS）followed by removal of PS.Palladium nanoparticle/polyaniline（PANI-Pd）nanotube composite was then prepared by PdCl2 reduction on PANI nanotube in the presence of sodium borohydride.The formation of PANI nanotube and deposition of Pd nanoparticles were demonstrated by scanning electron microscopy.The obtained PANI-Pd nanotube-modified glassy carbon electrode was very sensitive to the catalytic oxidation of hydrazine,studied by cyclic voltammetry and differential pulse voltammetry.It was found that the concentration of PdCl_2 had great influence on the catalytic activity of PANI-Pd nanotubes,and the catalytic activity was the highest at the PdCl_2 concentration of 10mmol/L.Under the optimal conditions,agood linear relationship between catalytic current and concentration of hydrazine was obtained in the linear range of both 2.0×10^-5-1.0×10^-4 mol/L and 3.0×10^-4-7.0×10^-3 mol/L,and the limit of detection was 2.0×10^-6 mol/L.These results show that the Pd-PANI nanotube modified electrode is promising for hydrazine sensor application.

关 键 词：静电纺丝 聚苯胺纳米管 钯纳米粒子 循环伏安法 水合肼 

分 类 号：O657.1[理学—分析化学]