title: Facile synthesized SnO2decorated functionalized graphene modified electrode for sensitive determination of daidzein.
abstract: A one-step and facile method using SnCl2·H2O as reducing agent to reduce graphene oxide (GO) was performed in the aid of poly(diallyldimethylammonium chloride) solution (PDDA). SnCl2·H2O is not only a reducing agent for graphene oxide (GO), but also a precursor of SnO2. SnO2-PDDA-GR composite was characterized by various surface, structural and electrochemical analysis techniques, such as transmission electron microscopy (TEM), UV spectrum (UV-vis), Infrared Spectrum (IR), X-ray diffraction (XRD), Cyclic voltammograms (CV) and electrochemical impedance (EIS). The SnO2-PDDA-GR composite was used to constructed electrochemical sensor (SnO2-PDDA-GR/GCE) for the determination of daidzein. Under the optimized experimental condition, it was found that the response of peak current is linear to the concentration of daidzein in the ranges of 2.0×10-8-1.0×10-6molL-1, and the detection limit was estimated to be 6.7×10-9mol L-1(S/N=3). Furthermore, this sensor was successfully applied for the determination of daidzein in traditional Chinese medicine (pueraria lobata) and Daidzein tablets.
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Yamin
authors.initials: Y
authors.lastname: Fu
authors.affiliation: 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.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Yinghao
authors.initials: Y
authors.lastname: Duan
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
authors.forename: Lina
authors.initials: L
authors.lastname: Zou
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China. Electronic address: yebx@zzu.edu.cn.
authors.forename: Baoxian
authors.initials: B
authors.lastname: Ye
keywords: Daidzein; Electrochemical sensor; Graphene; Poly(diallyldimethylammoniumchloride); SnO(2)