title: Highly sensitive determination of esculetin on TiO2-NPs-coated poly(diallyldimethylammonium chloride)-functionalized graphene modified electrode.
abstract: 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 TiO2NPs, 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 4×10-9molL-1(S/N=3) and a wide linear detection range from 1×10-8to 3.5×10-6molL-1were 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.
authors: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors: Huichao
authors: H
authors: Li
authors: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China; Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, PR China.
authors: Lu
authors: L
authors: Wang
authors: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors: Kai
authors: K
authors: Sheng
authors: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors: Lina
authors: L
authors: Zou
authors: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China. Electronic address: yebx@zzu.edu.cn.
authors: Baoxian
authors: B
authors: Ye
keywords: Esculetin; Graphene; Poly(diallyldimethylammonium chloride); TiO(2) NPs; Voltammetric sensor