Boakye Andrews, Yu Kun, Chai Huining, Xu Tailin, Houston Lystra Sarah, Asinyo Benjamin K, Zhang Xueji, Zhang Guangyao, Qu Lijun
Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China.
Langmuir. 2024 Feb 6;40(5):2708-2718. doi: 10.1021/acs.langmuir.3c03257. Epub 2024 Jan 26.
Due to their highly exposed active sites and high aspect ratio caused by their substantial lateral dimension and thin thickness, two-dimensional (2D) metal-organic framework (MOF) nanosheets are currently considered a potential hybrid material for electrochemical sensing. Herein, we present a nickel-based porphyrinic MOF nanosheet as a versatile and robust platform with an enhanced electrochemical detection performance. It is important to note that the nickel porphyrin ligand reacted with Cu(NO)·3HO in a solvothermal process, with polyvinylpyrrolidone (PVP) acting as the surfactant to control the anisotropic development of creating a 2D Cu-TCPP(Ni) MOF nanosheet structure. To realize the exceptional selectivity, sensitivity, and stability of the synthesized 2D Cu-TCPP(Ni) MOF nanosheet, a laser-induced graphene electrode was modified with the MOF nanosheet and employed as a sensor for the detection of -nitrophenol (-NP). With a detection range of 0.5-200 μM for differential pulse voltammetry (DPV) and 0.9-300 μM for cyclic voltammetry (CV), the proposed sensor demonstrated enhanced electrochemical performance, with the limit of detection (LOD) for DPV and CV as 0.1 and 0.3 μM, respectively. The outstanding outcome of the sensor is attributed to the 2D Cu-TCPP(Ni) MOF nanosheet's substantial active surface area, innate catalytic activity, and superior adsorption capacity. Furthermore, it is anticipated that the proposed electrode sensor will make it possible to create high-performance electrochemical sensors for environmental point-of-care testing since it successfully detected -NP in real sample analysis.
由于二维（2D）金属有机框架（MOF）纳米片具有高度暴露的活性位点以及由其较大的横向尺寸和薄厚度所导致的高纵横比，目前被认为是一种用于电化学传感的潜在混合材料。在此，我们展示了一种基于镍的卟啉MOF纳米片，它是一个多功能且稳健的平台，具有增强的电化学检测性能。需要注意的是，镍卟啉配体在溶剂热过程中与Cu(NO)·3HO反应，聚乙烯吡咯烷酮（PVP）作为表面活性剂来控制各向异性生长，从而形成二维Cu-TCPP(Ni) MOF纳米片结构。为了实现合成的二维Cu-TCPP(Ni) MOF纳米片卓越的选择性、灵敏度和稳定性，用该MOF纳米片修饰激光诱导石墨烯电极，并将其用作检测对硝基苯酚（-NP）的传感器。对于差分脉冲伏安法（DPV），检测范围为0.5 - 200 μM，对于循环伏安法（CV），检测范围为0.9 - 300 μM，所提出的传感器展示出增强的电化学性能，DPV和CV的检测限（LOD）分别为0.1和0.3 μM。该传感器的出色结果归因于二维Cu-TCPP(Ni) MOF纳米片较大的活性表面积、固有的催化活性和优异的吸附能力。此外，由于它在实际样品分析中成功检测到了 -NP，预计所提出的电极传感器将有可能用于创建用于环境即时检测的高性能电化学传感器。
