ZnO-CNT/Nano-Au modified electrodes for the detection of trace Hg(II) in coastal seawater

Abstract Mercury (Hg) in seawater enters the body through food chain, causing damage to organs and nervous system. Thus, there is an urgent need explore a rapid convenient sensor for detection monitoring of Hg(II) seawater. Herein, ZnO-CNTs/Nano-Au modified glassy carbon electrode was prepared by dropping method. The structure composite membrane mainly observed scanning electron microscopy (SEM), results show that has larger specific surface area. Moreover, can increase ion adsorption enhance conductivity. Differential pulse voltammetry (DPV) applied determine trace amounts optimized conditions were as follows: accumulation potential, time, pH value, film thickness concentration. Under optimal experimental conditions, linear relationship between values oxidation peak current concentration kept range 1.49 ∼ 5.97 μ M, with correlation coefficient R 2 = 0.991 limit 0.0118 M. proposed method analysis coastal water Maowei Sea, giving recovery 94.2%∼98.4%. ZnO-CNTs/Nano-Au-modified high sensitivity, operation good practical application value.