Premium
Glassy Carbon Electrode Modified via Molybdenum Disulfide Decorated Multiwalled Carbon Nanotubes for Sensitive Voltammetric Detection of Aristolochic Acids
Author(s) -
Wang Ying,
Mamat Xamxikamar,
Li Yongtao,
Hu Xun,
Wang Ping,
Dong Yemin,
Hu Guangzhi
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800893
Subject(s) - molybdenum disulfide , nanocomposite , materials science , detection limit , electrochemical gas sensor , electrochemistry , scanning electron microscope , electrode , nuclear chemistry , carbon nanotube , transmission electron microscopy , selectivity , analytical chemistry (journal) , chemical engineering , nanotechnology , chemistry , chromatography , organic chemistry , composite material , engineering , catalysis
Abstract In this study, a molybdenum disulfide/multiwalled carbon nanotubes (MoS 2 @MWCNTs) nanocomposite was synthesized by employing a simple hydrothermal method. The flower‐like structure of the MoS 2 @MWCNTs was characterized via scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the load of crystalline MoS 2 was verified via X‐ray diffraction (XRD) and energy‐dispersive spectroscopy (EDS). The as‐prepared MoS 2 @MWCNTs nanocomposite was used to modify glassy carbon electrode (GCE) as an electrochemical sensor for detecting aristolochic acids (AAs). With the optimized parameters, the proposed electrochemical sensor exhibited good sensitivity and a broad linear concentration range for detecting AAs from 0.2 to 10 μ mol/L and 10 to 100 μ mol/L, with the sensitivity of −3.10 μ A/( μ mol/L) and −0.91 μ A/( μ mol/L), respectively. The detection limit was also calculated as 0.06 μ mol/L (S/N=3) based on the low background signal. Furthermore, the modified electrochemical sensor exhibited good selectivity, repeatability, reproducibility, and stability, thus showing potential application for detecting AA in chinese herbs with good mean recovery and accuracy. In other words, the MoS 2 @MWCNTs/GCE can be used as an excellent platform to detect AAs.