分析化学Issue(7)：985-990,6.DOI:10.11895/j.issn.0253-3820.131235
静电纺ZnO/碳复合纳米纤维修饰电极制备及对痕量铅的测定
Preparation of Electrospun ZnO-Carbon Composite Nanofiber Modified Electrodes for the Detection of Trace Lead
摘要
Abstract
ZnO nanoparticle-containing carbon composite nanofiber ( ZnO-CNF ) was prepared by the electrospinning of the ZnCl2-PAN precursor, followed by preoxidation and carbonization. The ZnO nanoparticles were uniformly distributed on the surface of the carbon nanofiber with the size of 20-30 nm, confirmed by scanning electron microscopy ( SEM ) . The wettability of the ZnO-CNF was studied by water contact angle test. With Nafion as an additive, the ZnO-CNF modified electrode was successfully constructed by dip-coating. The surface morphology and electrochemical properties of the modified electrode were investigated by SEM and cyclic voltammetry. There was a sensitive response of the ZnO-CNF modified electrode on Pb ions in solution, demonstrated by square wave stripping voltammetry. Under the optimized conditions, a good linear relationship between peak current and Pb2+concentration was obtained in the range of 2. 4×10-10-2. 4×10-7 mol/L (R=0. 998) by 10 min preconcentration at -1. 0 V in 0. 1 mol/L NaAc buffer solution (pH=4. 6). The detection limit was 4. 8×10-11 mol/L. The practical analytical application of the ZnO-CNF modified electrode was assessed by the measurement of the actual water sample and the result was consistent with that obtained by ICP-MS.关键词
静电纺丝技术/ZnO/碳复合纳米纤维修饰电极/铅/方波溶出伏安法Key words
Electrospining technique/Zinc oxide nanoparticle/carbon nanofiber/Lead/Square wave stripping voltammetry引用本文复制引用
周鑫,杨健茂,辛萌,陈梦妮,王兴,刘建允..静电纺ZnO/碳复合纳米纤维修饰电极制备及对痕量铅的测定[J].分析化学,2014,(7):985-990,6.基金项目
本文系国家自然科学基金(No.21105009)和电分析化学国家重点实验室开放课题(No. SKLEAC201205)资助@@@@This work was supported by the National Natural Science Foundation of China (No.21105009) （No.21105009）
