Abstract
FeOOH nanorods synthesized using a solvothermal approach have been employed to investigate the electrochemistry of organic pollutions, including ponceau 4R (PR), sunset yellow (SY), and tetrabromobisphenol A (TBBPA). The as-prepared FeOOH nanorods have been characterized using scanning electron microscopes (SEM), transmission electron microscope (TEM), X-ray photoelectron spectrometry, Brunauer-Emmett-Teller measurements, and electrochemical techniques. The modified electrode based on FeOOH nanorods exhibits a porous and net-like structure, resulting in a high surface area and many reactive/adsorption sites for soluble compounds. On this modified electrode, fast electron transfer processes of redox probes have been achieved. Electrochemistry of PR, SY, and TBBPA has been studied in detail using voltammetry, impedance, and chronocoulometry. The sensitive monitoring of both individual and total concentrations of three organic pollutions has been realized. The detection limits are 0.2, 1.0, and 0.55nM for PR, SY, and TBBPA, respectively. Such an electrode is then promising for the electrochemical investigation and analysis of organic pollutions in different environments.
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