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《Chinese Journal of Analytical Chemistry》 2015-09
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Preparation of Zinc Oxide-Graphene Composite Modified Electrodes for Detection of Lead

LU Yuan-Yuan;CHEN Meng-Ni;GAO Yi-Li;YANG Jian-Mao;MA Xiao-Yu;LIU Jian-Yun;College of Environmental Science and Engineering,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University;Analysis and Test Center,Donghua University;  
Zn O nanotubes were prepared via electrospinning the Zn( AC)2-polyacrylonitrilepolyvinylpyrrolidone( PAN-PVP) precursor,followed by thermal decomposition of the above polymers from the precursor fibers. SEM and XRD characterization confirmed that the as-prepared Zn O nanofibers presented the hollow nanotube form,which was composed of Zn O nanoparticles with the size of about 40 nm in wurtzite crystal structure. By mixing with graphene,the obtained Zn O-graphene composite modified glassy carbon electrode( Zn O-RGO / GCE) was successfully constructed by dip-coating, which was used for the determination of Pb2 +in water. With the sensitive response of the Zn O- RGO / GC electrode to Pb2 +in solution was demonstrated by square wave stripping voltammetry,the response pctential was at-0. 4V. Under the optimized conditions,a good linear relationship between peak current and Pb2 +concentration was obtained in the range of 2. 4 × 10!9- 4. 8 × 10!7mol / L( R = 0. 9970) by 10 min preconcentration at !1. 0 V in 0. 1 mol /L HAc-Na Ac buffer solution( p H = 4. 6). The detection limit was 4. 8 × 10!10mol / L( S / N 3). The Zn ORGO / GC electrode had good stability. The practical analytical application of the Zn O-RGO modified electrode was assessed by the measurement of the actual water sample and the result was consistent with that obtained by ICP-MS.
【Fund】: 国家自然科学基金(No.21105009);; 电分析化学国家重点实验室开放课题(No.SKLEAC201205)资助~~
【CateGory Index】: X832
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