Key Laboratory for Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, PR China.
Liquor Making Biology Technology and Application of Key Laboratory of Sichuan Province, College of Bioengineering, Sichuan University of Science and Engineering, 188 University Town, Yibin, 644000, PR China.
Talanta. 2023 May 1;256:124294. doi: 10.1016/j.talanta.2023.124294. Epub 2023 Jan 21.
Herein, we developed a unique screen-printed carbon electrode (SPCE) with three-dimensional melamine-doped graphene oxide/MXene composite aerogel (3D MGMA) modification, which is used for the simultaneous and sensitive detection of three metal ions (Zn, Cd, and Pb) in the environment. A self-assembly method was used to fabricate 3D MXene aerogels based on MXene, graphene oxide (GO), and melamine. Notably, the network-like 3D structure combining 2D MXene and rGO sheets can provide a high ratio of surface area and enriched functional clusters, which are beneficial for improving the electrical conductivity and promoting the uptake of heavy metal ions. In the linear range of 3-900 μg L, the constructed innovative sensing platform can sensitively detect Zn, Cd, and Pb simultaneously, with detection limits of 0.48 μg L,0.45 μg L and 0.29 μg L respectively. This work reflects precision and reliability in the detection of three water samples (tap water, Minzhu lake and Yangtze River) and four cereal samples (sorghum, rice, wheat and corn), proposing a novel strategy for monitoring heavy metal ions in the natural environment.
在此，我们开发了一种独特的丝网印刷碳电极（SPCE），具有三维三聚氰胺掺杂氧化石墨烯/ MXene 复合气凝胶（3D MGMA）修饰，用于同时灵敏检测环境中的三种金属离子（Zn、Cd 和 Pb）。采用自组装方法基于 MXene、氧化石墨烯（GO）和三聚氰胺制备 3D MXene 气凝胶。值得注意的是，结合二维 MXene 和 rGO 片的网状 3D 结构可以提供高的表面积比和丰富的功能簇，有利于提高导电性并促进重金属离子的摄取。在所构建的创新传感平台的线性范围内为 3-900μg/L，可同时灵敏地检测 Zn、Cd 和 Pb，检测限分别为 0.48μg/L、0.45μg/L 和 0.29μg/L。这项工作反映了在三种水样（自来水、民主湖和长江）和四种谷物样品（高粱、水稻、小麦和玉米）的检测中的精确性和可靠性，为监测自然环境中的重金属离子提出了一种新策略。
