An Electrochemical Application of MnO2Decorated Graphene Supported Glassy Carbon Ultrasensitive Electrode: Pb2+and Cd2+Analysis of Seawater Samples

Autor:	Aslı Erkal, Samet Yavuz, Zafer Üstündağ, İlknur Üstündağ
Rok vydání:	2015
Předmět:	Materials science Renewable Energy Sustainability and the Environment Graphene Glassy carbon Condensed Matter Physics Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Chemical engineering law Electrode Materials Chemistry Seawater
Zdroj:	Journal of The Electrochemical Society. 162:H213-H219
ISSN:	1945-7111 0013-4651
DOI:	10.1149/2.0571504jes
Popis:	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 × 10-11 M to 1 × 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%. © 2015 The Electrochemical Society.
Databáze:	OpenAIRE
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