An electrochemical sensing platform based on a new Cd(II)-containing ionic liquid for the determination of trichloroacetic acid and bromate

Abstract

The present work reports on the synthesis, characterization and performance of a new metalcontaining ionic liquid [(C 3 H 7 ) 2 -bim] 2 [CdCl 4 ] (bim = benzimidazole) as an electrocatalyst for trichloroacetic acid (TCA) and bromate reduction. The structure of Cd(II)-containing ionic liquid (Cd-IL) was characterized by X-ray crystallography, IR spectroscopy, and elemental analysis. The molecular structure contains two independent cations of 1,3-dipropyl-benzimidazolium and one anion of CdCl 4 2− . The cadmium atom has a tetrahedral geometry by coordinating to four chlorine atoms. The melting point of Cd-IL is 73°C. Electrochemical properties of the Cd-IL have been investigated by preparing bulk-modified carbon paste electrode, and Cd-IL is used as a binder and an electrocatalyst. This modified electrode has good electrocatalytic activity toward reduction of TCA and bromate. The detection limit and the sensitivity are 0.01 μM and 102.72 μA μM −1 for trichloroacetic acid detection and 0.003 μM and 496.15 μA μM −1 for bromate detection. This work demonstrates that the Cd-IL may become a new kind of functional material in constructing chemicals and biosensors.

Electrochemical Sensors for Determination of Bromate in Water and Food Samples—Review

“…A new cadmium-ionic liquid-carbon paste electrode (Cd-IL/CPE) was fabricated for the simultaneous detection of trichloroacetic acid (TCA) and bromate by Zhuang and his team [57]. CV studies revealed that the fabricated electrode has good electrocatalytic activity towards TCA and BrO 3 − reduction at pH 6.1 in 0.1 M B-R buffer solution.…”

Review—New Generation Electrode Materials for Sensitive Detection

“…61 a-Fetoprotein (AFP) is one of the most extensively used clinical cancer biomarkers, Huang et al, proposed a voltammetric method involving the use of CILE for its detection. 47 CILEs have been extensively used in the detection of various flavonoids, 80,85,132,166 pharmaceuticals, 79,121,125,[127][128][129]135,138 vitamins 161,163,165,187 DNA, 98 hydrogen peroxide, 113,178 trichloroacetic acid, 177,179,180 DNA bases 95,176 and various other compounds. 118,152,162,171,185 Ionic liquid/carbon nanotube paste electrodes (IL/CNTPE).-Ionic Liquid/Carbon Nanotube Paste Electrode is a type of CILE but here carbon nanotubes are used with or without graphite with ILs to form the carbon paste.…”