期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 201, 期 -, 页码 51-58出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.05.004
关键词
Nonenzymatic sensor; Hydrogen peroxide; Silver nanoparticles; Carbon nanotubes; Conducting polymer; Nanocomposite
资金
- NRF - MEST, South Korea [20100029128]
A novel method for highly sensitive H2O2 sensor is proposed using silver nanoparticles (AgNPs) modified oxidized poly-2,2':5',2-terthiophene 3 p benzoic acid/multi wall carbon nanotube (Ox-pTTBA/MWCNT). The Ox-pTTBA/MWCNT nanocomposite film was prepared via electropolymerization of a TTBA monomer and MWCNT mixture solution, followed by in situ electrooxidation of the pTTBAIMWCNT film. Then, AgNPs were formed on the Ox-pTTBA/MWCNT layer through immersing the freshly prepared Ox-pTTBA/MWCNT electrode in AgNPs solution. The characterization of sensor probe and experimental parameters affecting its activity were investigated employing UV-vis spectroscopy, transition electronic microscopy (TEM), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). The AgNPs/OxpTTBA/MWCNT nanocomposite showed an excellent electrocatalytic activity to H2O2 by significantly increasing the reduction peak current and completely inhibiting the effect of other interfering species. The sensor probe displays a fast response time less than 5s with a linear range from 10 to 260 p,M and detection limit of 0.24 p,M. The sensitive, stable and specific response to H2O2 demonstrates that the present sensor is potentially suitable for monitoring H2O2 concentrations in biological system. The application was conducted for the determination of H2O2 in human urine real samples. (C) 2014 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