Fabrication of Gold Nanopartides by Laser Ablation in Liquid and Their Application for Simultaneous Electrochemical Detection of Cd~(2+), Pb~(2+), Cu~(2+), Hg~(2+)

摘要

In this paper, we demonstrated the fabrication of high active and high sensitive Au nanopartides by laser ablation in liquid (LAI/) method, and their application in electrochemical detection of heavy metal ions. First, LAL method are used to fabricate Au nanopartides in water in a clean way. Second, the Au nanopartides were assembled onto the surface of the glassy carbon (GC) electrode by an electrophoretic deposition method to form an AuNPs/GC electrode for electrochemical characterization and detection. Through differential pulse anodic stripping voltammetry method, it shows that the AuNPs/GC electrode could be used for the simultaneous and selective electrochemical detection of Cd~(2+), Pb~(2+), Cu~(2+), and Hg~(2+). By studying the influence of test conditions to optimize the electrochemical detection, we can detect Cd~(2+), Pb~(2+), Cu~(2+), and Hg~(2+) simultaneously with a low concentration of 3 X 10~(-7) M in the experiments.