Laboratory of Natural Water Treatment (LADVEN), Water Researches and Technologies Center, Techno-park Borj-Cedria, BP 273, 8020, Soliman, University of Carthage, Tunisia; Valorization Laboratory of Useful Materials (LVMU), National Center of Material Science Research (CNRSM), Techno-park Borj-Cedria, BP 273, 8020, Soliman, University of Carthage, Tunisia.
Laboratory of Natural Water Treatment (LADVEN), Water Researches and Technologies Center, Techno-park Borj-Cedria, BP 273, 8020, Soliman, University of Carthage, Tunisia.
Anal Chim Acta. 2020 Nov 15;1137:19-27. doi: 10.1016/j.aca.2020.08.032. Epub 2020 Aug 27.
A non-enzymatic sensor based on a curcumin modified pencil graphite electrode, loaded with molybdenum disulfide nanosheets decorated gold foam, was constructed. Herein, the electrochemical deposition strategy was adopted throughout the sensing platform design stepwise. The electroactivity of the pencil electrode platform enables sensitive simultaneous quantification of hydrazine and nitrite where the respective working potentials typically are at + 0.2 V for hydrazine and + 0.75 V for nitrite (both vs. Ag/AgCl, saturated KCl). It is shown that the resulting sensor demonstrates excellent analytical performances in terms of limits of detection (18.3, 21.7 nM), sensitivities (0.051, 0.061 μA μM), and reproducibility standard deviations (RSD) of 3.1 and 2.7% for hydrazine and nitrite, respectively. Furthermore, long term stability studies showed that the electrodes exhibited an effectively unchanged response after some 30 days. The sensor was used to analyze spiked samples of river water and industrial wastewater.
构建了一种基于姜黄素修饰的铅笔石墨电极、负载二硫化钼纳米片修饰的金泡沫的非酶传感器。在此，通过电化学沉积策略逐步设计传感平台。铅笔电极平台的电化学活性使得能够对肼和亚硝酸盐进行灵敏的同时定量，肼的工作电位通常为+0.2 V，亚硝酸盐的工作电位通常为+0.75 V（均相对于 Ag/AgCl，饱和 KCl）。结果表明，该传感器在检测限（18.3、21.7 nM）、灵敏度（0.051、0.061 μA μM）和肼及亚硝酸盐的重现性标准偏差（RSD）分别为 3.1%和 2.7%方面表现出优异的分析性能。此外，长期稳定性研究表明，电极在大约 30 天后仍表现出有效不变的响应。该传感器用于分析河水和工业废水的加标样品。
