聚乙烯亚胺
化学
碳纳米管
电化学
复合数
纳米技术
银纳米粒子
纳米颗粒
碳纤维
纳米复合材料
化学工程
电极
复合材料
基因
工程类
物理化学
生物化学
转染
材料科学
作者
Shuo Duan,Rui Yue,Yuming Huang
出处
期刊:Talanta
[Elsevier]
日期:2016-11-01
卷期号:160: 607-613
被引量:15
标识
DOI:10.1016/j.talanta.2016.08.011
摘要
For the first time, polyethylenimine (PEI) and carbon nanotubes (CNT) composites (PEI-CNTs) were employed for investigation of electrochemical response of silver nanoparticles (AgNPs) in this work. The PEI-CNTs were easily prepared by sonicating the mixture of PEI and CNTs solution and characterized by SEM, Raman and electrochemical impedance spectroscopy (EIS). The PEI-CNTs/GCE enhanced the electrochemical response for three AgNPs with different capping agents, including citrate-AgNPs (Cit-AgNPs), humic acid-AgNPs (HA-AgNPs) and gum acacia-AgNPs (GA-AgNPs), by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and chronocoulometry (CC). On these findings, a new electrochemical method based on LSV was developed for the detection of AgNPs. Under the optimum conditions, the proposed method showed a good linear range from 5 to 200 ng/L, and the limits of detection (LODs) were 4.77 ng/L for Cit-AgNPs, 2.48 ng/L for HA-AgNPs and 1.01 ng/L for GA-AgNPs, respectively. The potential of using the PEI-CNTs modified GCE for determining AgNPs in water samples has been successfully demonstrated.
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