Synthesis and Voltammetric Determination of Pb(II) Using a ZIF-8-Based Electrode

Abstract

Zeolite imidazole framework-8 (ZIF-8) was prepared by the hydrothermal process. e obtained ZIF-8 was a characteristic of X-ray-diffraction (XRD), transmission electron microscope (TEM), thermal gravity-differential thermal analysis (TG-DTA), and dynamic light scattering (DLS). e obtained ZIF-8 possessed large specific area and was highly dispersed. Its morphology consisted of nanospherical particles with 30-50 nm in diameter. Chemical stability of ZIF-8 in different conditions was studied.e ZIF-8 was used as an electrode modifier for the determination of trace levels of lead. e parameters including solvents and solution pH were investigated. e repeatability, reproducibility, accuracy, linear range, limit of detection, and limit of quantitation were also addressed. e results showed that ZIF-8 is a potential electrode modifier for differential pulse anodic stripping method to determine Pb(II) in aqueous solution.

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