Graphene Oxide as a Novel Nanoplatform for Electrochemical Detection of Arsenic (III)

Abstract

In this paper, we present a novel and stable electrochemical sensor made of a magnetite/graphene oxide (Fe₃O₄/rGO) nanocomposite. It was deposited on a glassy carbon electrode for electroanalytical detection of As³⁺, via cyclic voltammetry and square wave anodic stripping voltammetry in phosphate buffer solutions. The electrode shows a very good relation between current response and amount of arsenic in a concentration of pollutants ranging from micromolar to nanomolar. Our sensor is easy to use, inexpensive and has allowed sensitive detection of As in non-acidic media (pH=7).