electrochemical determination of lead and copper ions by using uio-66/tio2-carbon paste electrode

In this study, carbon paste fabricated and modified a novel sensitive voltammetric sensor based on uio-66/tio2 mof nanocomposite through the solvothermal method. the electrode surface morphology and enhancement study were performed through fesem and ft-ir. the electrochemical behavior of the modified electrode was evaluated using cyclic voltammetry in the [fe (cn)6]3-/4-solution and represented good electrocatalytic activity due to the synergy result of tio2 and uio-66. for quantitative analyses, differential pulse voltammetry was used under optimal conditions. the calibration curves show linear response in the concentration range of 2-100 μm with the lowest limit of detection of 0.851 µm and 0.436 µm were obtained for pb2+ and cu2+, respectively. the sensor exhibited high sensitivity and selectivity, good reproducibility, desirable stability, and excellent performance in real samples.