Electrochemical Detection of Fe2+ ions in Water using 2-Dimensional g-C3N4 modified Glassy Carbon Electrode-based Sensor

This work presents a 2-Dimensional (2D) Graphitic carbon nitride (g-C 3 N 4 ) modified glassy carbon electrode (GCE)based electrochemical sensor for detection of F$\mathrm{e}^{2+}$ ions in water. The 2Dg-C 3 N 4 nanomaterial is prepared by dispersing, ultrasonification and then modifying the GCE using the drop-casting method. The structural and morphological characteristics of the prepared g-C 3 N 4 are examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The performance of the sensor is analysed for different concentrations (from 0.9 mM to 5 mM) of iron content in the electrolyte using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The obtained results indicate excellent sensing performance towards target ions. Along with the concentration study, the accumulation study (with a scan speed of10 mV/s to 1000 mV/s in -0.6V to 0. SV region) and repeatability analysis (30 CV scans) are also carried out. Based on the obtained results, the 2Dg-C 3 N 4 modified sensor work is a promising candidate for electrochemical detection of F$\mathrm{e}^{2+}$ ions in water for a wide range of applications.