ZIF-12 @ polypyrrole nanowires for selective detection of cadmium ions in water samples

Abstract

Cadmium ion detection is an important area of research since it is associated with numerous diseases in humans and the environment. In this study, selective Cd2+ ion detection using polypyrrole and ZIF-12 was investigated using the square wave voltammetry technique. A convenient chemical method is used to polymerize the pyrrole to form a composite, which provides a better electroactive surface area of 24.5 x 10-3 m2 for the ZIF-12@Ppy composite modified GCE. The –NH2 functional group in polypyrrole makes good adsorptive property for Cd2+ ion capture with a detection range of 10 µM to 5 mM, the regression equation of y = 0.0102 x + 43.289, and low detection limit of approximately 50 nM as a result of enhanced electrocatalytic activity. The good anti-interference properties, repeatability, and stability of the prepared composite successfully demonstrated for the detection of Cd2+ ions in real samples from various water sources. Overall, these studies provide good insights into the development of an effective device for the detection of Cd2+ ions using polypyrrole and ZIF-12 platform.