Molecularly Imprinted Electrochemical Sensor Based on Palladium@Yttrium Oxide@Boronnitride Nanocomposite for Determination of Glyphosate Herbicide in Drinking Water Samples
Bahar Bankoğlu Yola, Sena Bekerecioğlu, İlknur Polat, Ülkü Melike Alptekin, Necip Atar, Mehmet Lütfi Yola
Abstract
Glyphosate (GLY) is a systemic herbicide used in agriculture and has a carcinogenic effect after long-term usage. Herein, a molecularly imprinted electrochemical sensor based on palladium@yttrium oxide@boron nitride nanosheets (Pd/Y2O3@BN) nanocomposite was developed for the detection of GLY in drinking water. After the preparation of Pd/Y2O3@BN nanocomposite by using sonication and NaBH4 reduction methods, Pd/Y2O3@BN nanocomposite as electrode material was applied on glassy carbon electrode by infrared lamp. Then, a molecularly imprinted glassy carbon electrode based on Pd/Y2O3@BN (MIP) was designed with cyclic voltammetry (CV) in presence of pyrrole monomer and GLY molecule. After the spectroscopic and microscopic characterizations, the linearity in the range of 1.0 × 10−9–1.0 × 10−8 M with a detection limit (LOD) of 3.3 × 10−10 M was obtained for GLY molecule. After MIP electrode was applied to drinking water samples with high recovery, the selectivity, stability, repeatability, and reproducibility features were studied. These promising results suggested that the as-fabricated MIP electrode presented a novel and highly effective approach for GLY assay.