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 cm²), and increased roughness factor (35.4).

Such outstanding features of the NPG_A+B platform were demonstrated by the sensitive detection of methyl parathion (MP) in river water samples. CV results indicated nearly 25-fold, 6-fold, and 2.5-fold higher sensitivity for NPG_A+B compared to that of bare Au, NPG_A, and NPG_B, respectively. Differential pulse voltammetry (DPV) results show a linear behavior in the MP concentration range of 5–50 ng mL⁻¹ with a limit of detection (LOD) of 0.6 ng mL⁻¹ and limit of quantification (LOQ) of 2.0 ng mL⁻¹. Besides, the NPG_A+B sensor also revealed excellent selectivity towards MP detection in the presence of other interfering molecules or ions, reproducibility, and repeatability.

在这项工作中，纳米多孔金（NPG）是根据三种不同的方法制备的，例如（i）阳极氧化-电化学还原（A-ECR，NPG _A），（ii）动态氢气泡模板（DHBT，NPG _B），以及（iii）两种方法的组合（NPG _{A + B}）。利用场发射扫描电子显微镜（FE-SEM）和循环伏安法（CV）研究了所制备材料的结构形态和电化学行为。NPG _{A + B}电极显示出大量的表面缺陷和/或边缘，更大的电化学表面积（2.5 cm ²）和增加的粗糙度因子（35.4）。

NPG _{A + B}平台的这些杰出功能通过对河水样品中甲基对硫磷（MP）的灵敏检测得到了证明。CV结果表明，与裸金，NPG _A和NPG _B相比，NPG _{A + B的}灵敏度分别高出近25倍，6倍和2.5倍。微分脉冲伏安法（DPV）结果显示在5-50的MP浓度范围内的线性行为纳克毫升^-1与0.6检测（LOD）的纳克毫升极限^-1定量限（LOQ）为2.0纳克mL和限制^{- 1}。此外，NPG _{A + B} 传感器还显示在存在其他干扰分子或离子的情况下，对MP检测具有出色的选择性，重现性和可重复性。