期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 235, 期 -, 页码 408-413出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.105
关键词
Bisphenol A; Electrochemical sensor; MWCNTs; Polyethylenimine (PEI)
资金
- Shanghai Education Committee [15ZZ070]
- National Natural Science Foundation of China [21373138]
Bisphenol A (BPA), an important widely used industrial material, could emulate or disrupt the endogenous estrogen. This work presents a simple and convenient electrochemical differential pulse voltammetry (DPV) method for sensitively determining BPA via the fabricated sensor basing MWCNTs-PEI nanocomposites. Scanning electron microscopy (SEM) and Zeta potential measurements have been employed to characterize the morphology and surface modification of the nanocomposites. Electrochemical behaviors of BPA on MWCNTs-PEI modified electrode were investigated. The experimental parameters, such as accumulation potential, accumulation time and pH, have been optimized. Under the optimal conditions, the constructed sensor showed a wide linear range from 10 nM to 50 mu M, low detection limit of 3.3 nM BPA (S/N = 3), good stability and reproducibility, which could be attributed to that the presence of MWCNTs promotes fast electron-transfer, and polyethylenimine (PEI) provides a positively charged surface for favorably loading a large amount of BPA. Furthermore, this proposed sensor was successfully demonstrated for the detection of BPA in the real milk samples. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据