Ultrathin Sulfur-Doped Graphitic Carbon Nitride Nanosheets As Metal-Free Catalyst for Electrochemical Sensing and Catalytic Removal of 4-Nitrophenol

By C. Rajkumar, P. Veerakumar, Shen-ming Chen, Balamurugan Thirumalraj, K. Lin. ACS Sustainable Chemistry and Engineering, 2018

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Graphene-like sulfur-containing graphitic carbon nitride (S-GCN) nanosheets were successfully prepared and thoroughly characterized. A simple synthetic method by a thermal condensation approach was reported for the preparation of S-GCN with trithiocyanuric acid (TCA) as precursor. The electrochemical performances of the 4-nitrophenol (4-NP) sensors were assessed by cyclic voltammetry (CV), amperometry, and differential pulse voltammetry (DPV). Ultrathin S-GCN nanosheets have been employed to enhance electrocatalytic activity, showing remarkable electrochemical behavior toward 4-NP. We thus obtained a wide linear response range from 0.05 to 90 μM, a relatively low detection limit (0.0016 μM), and excellent sensitivity in 0.1 M acetate buffer (ABS, pH 5.5), surpassing the existing modified electrodes in the literature. Moreover, the fabricated S-GCN electrode is selective in the presence of many potentially interfering species. As a result, the S-GCN contains (C with N and S) heteroatoms that probably induc...

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/4d0474530d4d01eb3bff019b5636f9fd625b2212