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采用NiNPs修改的GCE进行选择性和敏感的尿素传感的创新电化学方法

Weaam Hakami¹, Ekram Y Danish¹, Amna N Khan¹

¹Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

Scientific reports

|November 12, 2025

概括

在玻璃碳电极 (GCE) 上使用纳米粒子 (NiNPs) 的新电化学传感器提供了一种简单而灵敏的方法来检测食品和环境样本中的尿素. 这种NiNPs/GCE传感器表现出高选择性和低尿素污染检测极限.

科学领域:

电化学电化学电化学
纳米材料科学科学纳米材料科学
环境监测环境监测

背景情况:

废弃物来源的尿素污染需要简单,有选择性和敏感的检测方法,以确保食品和环境安全.
现有的方法可能缺乏在复杂矩阵中准确量化尿素所需的灵敏度或选择性.
电化学传感为开发快速且具有成本效益的分析工具提供了一个有希望的平台.

研究的目的:

开发一种创新的电化学传感器,用于敏感和选择性尿素检测.
为了利用纳米粒子 (NiNPs) 改造的玻璃碳电极 (GCE) 提高尿素传感性能.
在现实环境样本中验证传感器的有效性.

主要方法:

使用三基和酸合成稳定的合纳米粒子 (NiNPs).
通过滴滴造用合成的NiNPs对GCE表面进行修改.
在NaOH电解质中使用循环电压测量 (CV) 和方波电压测量 (SWV) 进行电化学表征.
谱学和形态分析 (UV-Vis,FTIR,拉曼,XRD,SEM,TEM) 用于NiNPs的表征.

主要成果:

NiNPs/GCE表现出增强的电化学电荷转移和尿素氧化催化活性.
与酸覆盖的对应物相比,Tris覆盖的NiNPs表现出更高的性能.
方波电压测量使选择性尿素检测能够在0.0625-1.25mM的线性范围内进行.
达到28.8μM (S/N=3) 的低检测极限,具有高尿素回收率 (>98.7%在城市废水中,>94%在农业废水中).

结论:

NiNPs/GCE电化学传感器为尿素检测提供了一个高度敏感和选择性的平台.
开发的方法对于监测环境样本中的尿素污染是强大的和有效的.
这种方法为解决尿素检测挑战提供了一个简单而有效的解决方案.

关键词:

电化学检测电化学检测玻璃碳电极是一种玻璃碳电极.尼克尔纳米颗粒的使用方法方形波电压测量方形波电压测量尿素感应尿素感应

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