Department of Chemistry, Panjab University, Chandigarh, 160014, India.
Energy Research Centre, Panjab University, Chandigarh, India.
Mikrochim Acta. 2022 Apr 9;189(5):186. doi: 10.1007/s00604-022-05255-z.
A novel electrochemical sensor, 2-(anthracen-9-yl)benzothiazole (ABT)-modified nickel ferrite reduced graphene oxide (NF@rGO) has been designed for the individual and simultaneous detection of Cd, Cu, and Hg ions. Herein, NF@rGO nanocomposite, synthesized by a simple hydrothermal methodology, was hooked to ABT under easy and simple stirring conditions. Chelation of active functional groups of ABT with metal ions was augmented with higher adsorption and conductivity provided by NF@rGO. The created synergy resulted in analytical signals via selective oxidation of the ions within a potential ranging from - 1.2 to + 1.2 V vs sat. KCl. The proposed protocol exhibited a wide linear range from 0.05 to 1250 nM with excellent detection limit of 123, 54.1, and 86.6 pM via anodic stripping voltammetry for the simultaneous determination of Cd, Cu, and Hg ions, respectively. Simple cost-effective synthetic approach, improved sensitivity with high selectivity, noteworthy repeatability (RSD less than 3%), and reproducibility (RSD less than 7%) equipped with successful real time monitoring (apparent recovery more than 90%) bring about a spiffing sensing platform for the detection of hazardous metal ions.
一种新型电化学传感器，2-（蒽-9-基）苯并噻唑（ABT）修饰的镍铁氧体还原氧化石墨烯（NF@rGO），已被设计用于单独和同时检测 Cd、Cu 和 Hg 离子。在此，NF@rGO 纳米复合材料通过简单的水热方法合成，在简单搅拌条件下与 ABT 连接。ABT 的活性官能团与金属离子的螯合作用通过 NF@rGO 提供的更高吸附性和导电性得到增强。这种协同作用导致了在从-1.2 到+1.2 V vs sat. KCl 的范围内，通过离子的选择性氧化产生分析信号。所提出的方案通过阳极溶出伏安法表现出从 0.05 到 1250 nM 的宽线性范围，对于同时测定 Cd、Cu 和 Hg 离子，检测限分别为 123、54.1 和 86.6 pM。简单、经济高效的合成方法、高灵敏度和高选择性、出色的重复性（RSD 小于 3%）和重现性（RSD 小于 7%）以及成功的实时监测（明显回收率超过 90%）为检测有害金属离子带来了一个出色的传感平台。
