Fabrication of dendritic nanoporous gold via a two-step amperometric approach: Application for electrochemical detection of methyl parathion in river water samples

摘要

In this work, nanoporous gold (NPG) was prepared according to three different approaches, such as (i) anodization-electrochemical reduction (A-ECR, NPG(A)), (ii) dynamic hydrogen bubble template (DHBT, NPG(B)), and (iii) the combination of both methods (NPG(A+B)). Field-emission scanning electron microscopy (FE-SEM) and cyclic voltammetry (CV) were used to investigate the structural morphology and the electrochemical behavior of the fabricated materials. The NPG(A+B) electrode showed a large amount of surface defects and/or edges, greater electrochemical surface area (2.5 cm(2)), and increased roughness factor (35.4).