期刊
TALANTA
卷 161, 期 -, 页码 838-846出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2016.09.050
关键词
Esculetin; Graphene; TiO2 NPs; Poly(diallyldimethylammonium chloride); Voltammetric sensor
资金
- National Natural Science Foundation of China [21575130, U1504216]
- Zhengzhou University [1511316006]
The nanocomposites of titanium dioxide nanoparticles decorated poly(diallyldimethylammonium chloride)functionalized graphene (TiO2-PDDA-Gr) were successfully synthesized via a facile and green strategy. The prepared nanocomposites were characterized by X-ray diffraction (XRD), UV-visible spectrophotometry (UV-vis), Fourier Transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). By combining the merits of the PDDA-Gr and TiO2 NPs, a highly sensitive electrochemical sensor was erected to detect esculetin based on the TiO2-PDDA-Gr nanocomposites. Under the optimized conditions, a lower detection limit of 4x10(-9) mol L-1 (S/N=3) and a wide linear detection range from 1 x10(-8) to 3.5 x10(-6) mol L-1 were achieved by differential pulse voltammetry (DPV). Additionally, the proposed electroanalytical methodology was applied in Chinese herb Viola yedoensis Makino and Cortex Fraxini with satisfactory results, showing that fabricated sensor has potential to be applied.
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