Na,O-co-doped-graphitic-carbon nitride (Na,O-g-C3N4) for nonenzymatic electrochemical sensing of hydrogen peroxide

Abstract Na,O-co-doped-graphitic- carbon nitride (Na,O-g-C3N4) was synthesized under alkaline conditions and subsequent heat treatment. The Na,O-g-C3N4 had a relatively surface area and tuned optical properties with sheet-like characteristics. A glassy carbon electrode (GCE) was modified using the Na,O-g-C3N4 (Na,O-g-C3N4/GCE) and used for the non-enzymatic detection of H2O2 (hydrogen peroxide) by electrochemical methods. The Na,O-g-C3N4/GCE was assessed for the detection of hydrogen peroxide using cyclic voltammetry and showed a low detection limit (0.05 µM) and good sensitivity (3.41 µA µM-1cm−2) with a wide linear range of 1 µM −50 µM. In addition, the use of Na,O-g-C3N4/GCE for the detection of hydrogen peroxide using LSV also showed a relatively low detection limit (0.1 µM) and high sensitivity (17.57µA µM−1 cm−2) with a wide linear range of 1 µM-45 µM. Overall, Na,O-g-C3N4 is an efficient candidate for the detection of hazardous chemicals, such as H2O2, and could be a material of great importance for other environmental-related concerns.