Wang Guanda, Zhou Guangfeng, Zhang Qingze, He Dong, Zhao Chun, Suo Hui
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
Sensors (Basel). 2024 Jan 31;24(3):915. doi: 10.3390/s24030915.
As a common water pollutant, ammonia nitrogen poses a serious risk to human health and the ecological environment. Therefore, it is important to develop a simple and efficient sensing scheme to achieve accurate detection of ammonia nitrogen. Here, we report a simple fabrication electrode for the electrochemical synthesis of platinum-zinc alloy nanoflowers (PtZn NFs) on the surface of carbon cloth. The obtained PtZn NFs/CC electrode was applied to the electrochemical detection of ammonia nitrogen by differential pulse voltammetry (DPV). The enhanced electrocatalytic activity of PtZn NFs and the larger electrochemical active area of the self-supported PtZn NFs/CC electrode are conducive to improving the ammonia nitrogen detection performance of the sensitive electrode. Under optimized conditions, the PtZn NFs/CC electrode exhibits excellent electrochemical performance with a wide linear range from 1 to 1000 µM, a sensitivity of 21.5 μA μM (from 1 μM to 100 μM) and a lower detection limit of 27.81 nM, respectively. PtZn NFs/CC electrodes show excellent stability and anti-interference. In addition, the fabricated electrochemical sensor can be used to detect ammonia nitrogen in tap water and lake water samples.
作为一种常见的水污染物，氨氮对人类健康和生态环境构成严重风险。因此，开发一种简单高效的传感方案以实现对氨氮的准确检测具有重要意义。在此，我们报道了一种用于在碳布表面电化学合成铂锌合金纳米花（PtZn NFs）的简易制备电极。所制备的PtZn NFs/CC电极通过差分脉冲伏安法（DPV）用于氨氮的电化学检测。PtZn NFs增强的电催化活性以及自支撑PtZn NFs/CC电极较大的电化学活性面积有利于提高敏感电极的氨氮检测性能。在优化条件下，PtZn NFs/CC电极表现出优异的电化学性能，线性范围宽达1至1000 μM，灵敏度为21.5 μA μM（1 μM至100 μM），检测下限低至27.81 nM。PtZn NFs/CC电极具有出色的稳定性和抗干扰性。此外，所制备的电化学传感器可用于检测自来水和湖水样品中的氨氮。
