Determination of lead with rGO/MoS۲ nanocomposite-based electrochemical sensor

In this work, rGO/MoS۲ were fabricated on screen-printed electrode (SPE) substrates by developing a simple electrochemical deposition and annealing method. The as-prepared rGO/MoS۲ nanocomposite were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and infrared spectroscopy (IR). Heavy metals require careful monitoring due to their toxicity, and current methods are too complex or bulky for point-of-care use[۱]. Electrochemistry offers a convenient alternative for metal determination. The differential pulse voltammetry (DPV) method was performed to determine target metal ion. The effects of different experimental variables such as supporting electrolyte type and pH were investigated and optimized. At optimal electrochemical conditions, the developed electrode exhibited linear voltammetric responses in the ranges of ۰.۲–۵.۴ μM with the detection limits of ۰.۱۲ μM. In addition, the effects of common cation and anion interferences commonly found in environmental water were studied, and the satisfied results were obtained. Furthermore, the method was successfully applied to the determination of target analytes in lake water samples and satisfactory recoveries were observed from different spiked values.

کلیدواژه ها:

Metal monitoring ، Electrochemical sensor ، Reduced graphene oxide ، Molybdenum disulfide