期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 42, 期 -, 页码 227-233出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2014.05.045
关键词
Ferulic acid; Electrochemically reduced graphene oxide; Electrodeposition; Cyclic voltammetry; Differential pulse voltammetry
资金
- Twelfth Five-Year National Science and Technology Support Program of China [2011BAI05B02]
- Project of Science and Technology Agency of Gansu [1208RTZA211]
- Project of Science and Technology Agency of Lanzhou [2012-2-67]
- Gansu province administration bureau of traditional Chinese medicine [GZK-2011-73]
An electrochemically reduced graphene oxide (ERGO) modified glassy carbon electrode (GCE) was used as a new voltammetric sensor for the determination of ferulic acid (FA). The morphology and microstructure of the modified electrodes were characterized by scanning electron microscopy (SEM) and Raman spectroscopy analysis, and the electrochemical effective surface areas of the modified electrodes were also calculated by chronocoulometry method. Sensing properties of the electrochemical sensor were investigated by means of cyclic voltammetry (CV) and differential pulse voltammetry (DPV). It was found that ERGO was electrodeposited on the surface of GCE by using potentiostatic method. The proposed electrode exhibited electrocatalytic activity to the redox of FA because of excellent electrochemical properties of ERGO. The transfer electron number (n), electrode reaction rate constant (k(s)) and electron-transfer coefficient (alpha) were calculated as 1.12, 1.24 s(-1,) and 0.40, respectively. Under the optimized conditions, the oxidation peak current was proportional to FA concentration at 8.49 x 10(-8) mol L-1 to 3.89 x 10(-5) mol L-1 with detection limit of 2.06 x 10(-8) mol L-1. This fabricated sensor also displayed acceptable reproducibility, long-term stability, and high selectivity with negligible interferences from common interfering species. The voltammetric sensor was successfully applied to detect FA in A. sinensis and biological samples with recovery values in the range of 99.91%-101.91%. (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