An Electrochemical Application of MnO2 Decorated Graphene Supported Glassy Carbon Ultrasensitive Electrode: Pb2+ and Cd2+ Analysis of Seawater Samples

作者：Erkal Asli^*; Ustundag Ilknur; Yavuz Samet; Ustundag Zafer

来源：Journal of the Electrochemical Society, 2015, 162(4): H213-H219.

DOI：10.1149/2.0571504jes

Manganese dioxide (MnO2) decorated graphene oxide was modified on the glassy carbon (GC) surface. The nanofilm covered electrode was used for determination of Pb2+ and Cd2+ via differential pulse anodic stripping voltammetry. Characterization of the modified electrode was performed via cyclic voltammetry, TEM, XPS, and XRD. The limit of detection (S/N = 3) of the method was calculated as 1.24 pM for Pb2+ and 0.14 pM for Cd2+ with the linear calibration curves ranged from 1 x 10(-11) M to 1 x 10(-7) M for Pb2+ and Cd2+. The method shows good reproducibility and stability and was successfully applied to measure trace Pb2+ and Cd2+ in seawater samples from Turkey. The recoveries of the Pb2+ and Cd2+ response of the method were up to 96%.

• 出版日期2015