Exfoliated 2D Graphitic-Carbon Nitride Nanosheets as Sensor for Electrochemical Detection of Furazolidone

Abstract

The present work demonstrated a facile exfoliation of g-C3N4 NSs (E-C3N4 NSs) by a sonochemical approach to electrochemical detection of furazolidone (FZD). The structural and morphological characterization of E-C3N4 NSs was systematically verified. The results showed that the as-fabricated E-C3N4 NSs modified electrode exhibited an exceptional electrocatalytic activity for FZD comparing the bare electrode due to the better catalytic activity, electrical conductivity, distinct structure, high specific surface area, and high carrier mobility. Under optimum experimental parameters, the linear detection range of the E-C3N4 NSs-based electrochemical sensor is in a range from 0.002 to 224 μM with a detection limit of 0.0005 μM, which is higher than most reported electrode materials. In addition, the proposed electrode demonstrated strong selectivity and better operational stability toward FZD detection. Interestingly, our proposed electrode was effectively applied to detect FZD in environmental and biological samples with satisfying recovery values. As a result, the E-C3N4 NSs are likely to be used in a variety of electrochemical applications for detecting environmental contaminants.