Gonçalves Daniel A, Martins Vitor H N, Reis Diogo D, Silva Monize M, Souza Victor H R
Faculty of Exact Science and Technology, Universidade Federal da Grande Dourados (UFGD) Dourados MS Brazil
Instituto de Física, Universidade Federal de Mato Grosso do Sul (UFMS) Campo Grande MS Brazil.
RSC Adv. 2024 Sep 13;14(40):29134-29142. doi: 10.1039/d4ra04399e. eCollection 2024 Sep 12.
Glyphosate (Glyp), a widely used herbicide, has raised significant concerns regarding its toxicological effects and potential risks to human health, particularly concerning water pollution. Hence, there is a critical need to monitor glyphosate levels in water bodies. This study introduces a novel approach for electrochemically detecting glyphosate in aqueous environments using crumpled graphene decorated with nickel-based nanoparticles (Ni:CG) synthesized in a single step. Cyclic voltammetry and chronoamperometry techniques were employed for detection. The cyclic voltammetry analysis revealed an impressive linear range with detection and quantification limits of 2.0 × 10 M and 6.0 × 10 M, respectively. Additionally, the method demonstrated excellent accuracy and precision at low concentrations, as evidenced by successful glyphosate recovery from distilled-deionized water and spike-and-recovery tests, at a significant level of 99.9%. Furthermore, interference tests conducted chronoamperometry on the presence of Cu, Co, and Fe cations showcased the superior performance of the Ni:CG electrochemical sensor. The synthesis of crumpled graphene-/nickel-based composites offers a promising avenue for the future of on-site glyphosate detection, presenting a robust and efficient solution to environmental challenges.
草甘膦（Glyp）是一种广泛使用的除草剂，其毒理学效应以及对人类健康的潜在风险，尤其是对水污染问题，引发了人们的重大关注。因此，迫切需要监测水体中的草甘膦含量。本研究介绍了一种新颖的方法，用于在水环境中通过一步合成的镍基纳米颗粒修饰的皱巴巴石墨烯（Ni:CG）对草甘膦进行电化学检测。采用循环伏安法和计时电流法进行检测。循环伏安法分析显示出令人印象深刻的线性范围，检测限和定量限分别为2.0×10⁻⁶ M和6.0×10⁻⁶ M。此外，该方法在低浓度下表现出优异的准确度和精密度，从蒸馏去离子水和加标回收试验中成功回收草甘膦可证明这一点，回收率高达99.9%。此外，通过计时电流法对铜、钴和铁阳离子存在情况下进行的干扰测试展示了Ni:CG电化学传感器的卓越性能。皱巴巴石墨烯/镍基复合材料的合成，为未来现场检测草甘膦提供了一条有前景的途径，为环境挑战提供了一种强大而有效的解决方案。
