Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
J Hazard Mater. 2021 Jun 5;411:125054. doi: 10.1016/j.jhazmat.2021.125054. Epub 2021 Jan 6.
This work reports the electrochemical detection of highly hazardous material 4-Nitroaniline (4-NA) based on the metal oxide-rGO composite materials. The potassium intercalated MnO-rGO composite material was prepared by a simple one-pot reduction method. The K intercalation on K-MnO-rGO was confirmed by X-ray photoelectron spectroscopy (XPS) and Raman analysis. The amorphous nature of prepared material was scrutinized by high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) pattern analysis. The elemental compositions are done by energy dispersive X-ray Analysis (EDX) mapping. The prepared composite material K-MnO-rGO was used to determine the 4-NA by differential pulse voltammetry (DPV). The electroanalytical performances of fabricated K-MnO-rGO/SPCE were compared with the K-MnO and rGO in pH 7. The developed 4-NA sensor showed good sensitivity (2.85 µA µM cm), linear range (0.001-10.53 µM), and LOD (0.7 nM). Furthermore, the K-MnO-rGO/SPCE exhibited high selectivity with the other potential interfering nitro compounds in river water and pond water samples. Therefore the developed sensor can be applied for the determination of noxious pollutants in real-time monitoring devices.
这项工作报道了基于金属氧化物-rGO 复合材料的高危害性物质 4-硝基苯胺（4-NA）的电化学检测。通过简单的一锅还原法制备了钾插层 MnO-rGO 复合材料。X 射线光电子能谱（XPS）和拉曼分析证实了 K 插层在 K-MnO-rGO 上的存在。高分辨率透射电子显微镜（HRTEM）和选区电子衍射（SAED）图案分析仔细研究了制备材料的非晶性质。通过能量色散 X 射线分析（EDX）映射进行元素组成分析。制备的复合材料 K-MnO-rGO 用于通过差分脉冲伏安法（DPV）测定 4-NA。与 K-MnO 和 rGO 相比，制备的 K-MnO-rGO/SPCE 的电分析性能在 pH 7 下进行了比较。开发的 4-NA 传感器显示出良好的灵敏度（2.85 μA μM cm）、线性范围（0.001-10.53 μM）和 LOD（0.7 nM）。此外，K-MnO-rGO/SPCE 在河水和池塘水样中对其他潜在干扰的硝基化合物表现出高选择性。因此，该开发的传感器可用于实时监测设备中有害污染物的测定。
