Graphene oxide/multi-walled carbon nanotubes/gold nanoparticle hybridfunctionalized disposable screen-printed carbon electrode to determine Cd(II)and Pb(II)in soil

作     者：Hui Wang Yuan Yin Guo Zhao Fernando Bienvenido Isabel M.Flores-Parrad Zhiqiang Wang Gang Liu 

作者机构：Key Laboratory of Modern Precision Agriculture System Integration ResearchMinistry of Education and Key Laboratory of Agricultural Information Acquisition TechnologyMinistry of AgricultureChina Agricultural UniversityBeijing 100083China Department of InformaticsUniversity of AlmeriaAlmeriaSpain College of Computer Science and TechnologyShandong University of TechnologyZibo 255049China Research Institute of Wood IndustryChinese Academy of ForestryBeijing 100091China 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2019年第12卷第3期

页      面：194-200页

核心收录：

学科分类：08[工学] 0828[工学-农业工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was supported by the International Research Exchange Scheme of the Marie Curie Program of the 7th Framework Program(Ref.PIRSES-GA-2013-612659) Chinese National Natural Science Foundation(No.31671578) the Fundamental Research Funds for the Central Universities(Grant No.2016 XD001) the Shandong Provincial Natural Science Foundation of China(No.ZR2015CM016). 

主　　题：electrochemical electrode heavy metal contamination screen-printed carbon electrode graphene gold nanoparticle lead cadmium multi-walled carbon nanotube 

摘      要：Cadmium(Cd)and lead(Pb)in soil or water environment cause the ecological destruction and environmental deterioration when their contents exceed the natural background values.To trace the concentrations of Cd(II)and Pb(II),a sensitive and selective electrode was developed using disposable screen-printed carbon electrode(SPE)immobilized with a composite film of reduced graphene oxide/carboxylation multi-walled carbon nanotubes/gold nanoparticle hybrid(RGO-MWNT-AuNP)throughπ-πbind.This highly conductive nano-composite layer,“RGO-MWNT-AuNP,was characterized by scanning electron microscopy,UV-visible spectrometer,cyclic voltammetry,and electrochemical impedance spectroscopy.Square wave stripping voltammetry was applied to RGO-MWNT-AuNP/SPE to electroplate bismuth film and monitor the Cd(II)and Pb(II)simultaneously.To obtain high current responses,the detecting parameters were optimized.Under optimized conditions,the current responses showed a linear relationship with the concentrations of Cd(II)and Pb(II)in the range from 1.0 to 80.0μg/L with a lower detection limit of 0.7μg/L and 0.3μg/L(S/N=3),respectively.Finally,the prepared electrode was further employed to detect Cd(II)and Pb(II)in soil samples with good results.