二硫化钼
材料科学
纳米复合材料
检出限
电化学气体传感器
电化学
扫描电子显微镜
电极
核化学
透射电子显微镜
选择性
碳纳米管
分析化学(期刊)
化学工程
纳米技术
化学
色谱法
有机化学
复合材料
物理化学
工程类
催化作用
作者
Ying Wang,Xamxikamar Mamat,Yongtao Li,Xun Hu,Ping Wang,Yong Dong,Guangzhi Hu
标识
DOI:10.1002/elan.201800893
摘要
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.
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