Electrochemical determination of Hg~(2+) in sakura shrimp and drinking water using f-CNF/TeO_2 composite

摘要

Mercuric ions (Hg~(2+)) is a hazardous material and which affects the human health. Herein, we have developed a highly sensitive and selective electrochemical sensor for the determination of mercuric ions (Hg~(2+)) in sakura shrimp and drinking water samples. Tellurium oxide (TeO_2) prepared through ultrasonication has been combined with functionalized carbon nanofib-ers (f-CNF) which was prepared by following a simple sonication method. TeO_2 has outstanding properties like high electrical conductivity and good chemical stability. Here,f-CNF/TeO_2 composite was studied by using numerous characterizations such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopic techniques. Besides, the electrochemical behavior of f-CNF/TeO_2 composite modified glassy carbon electrode (GCE) was inspected by using electrochemical methods like cyclic voltammetry (CV) and different pulse voltammetry (DPV) techniques./-CNF/TeO_2/ GCE showed a good electrochemical activity towards the detection of Hg~(2+)./-CNF/TeO_2/GCE showed a detection limit of 7.60 nM and acceptable sensitivity of 13.52 μA μM~(-1) cm~(-2) and 2.875 μA μM~(-1) cm~(-2) towards Hg~(2+). Also, viable stability, selectivity, and reproducibility were found in f-CNF/TeO_2/GCE. The good performance of f-CNF/TeO_2/GCE towards Hg~(2+) was seen in sakura shrimp and drinking water samples.