Hierarchical Multi-Layered Molybdenum Carbide Encapsulated Oxidized Carbon Nanofiber For Selective Electrochemical Detection Of Antimicrobial Agents: Inter-Connected Path In Multi-Layered Structure For Efficient Electron Transfer
INORGANIC CHEMISTRY FRONTIERS(2019)
摘要
Metal carbides are an emerging class of electrode materials for various electrochemical applications. Herein, we have synthesized the molybdenum carbide (Mo2C) hexagons via a template assisted method. Subsequently, the Mo2C hexagons were integrated with functionalized carbon nanofiber (f-CNF) via the ultra-sonication method. The prepared Mo2C and Mo2C/f-CNF composites were analyzed using different techniques such as XRD, RAMAN, HR-TEM, and ESCA. The HR-TEM images of Mo-2/C/f-CNF composite evidently proved that the Mo-2/C hexagons are well integrated on surface of f-CNF along with a connection part for efficient electron transfer from Mo2C to f-CNF structure. Due to its excellent electrochemical properties, the proposed Mo2C/f-CNF nanocomposite modified GCE was developed as an efficient electrode for the electrochemical detection of metronidazole (MTZ). As expected, Mo2C/f-CNF/GCE achieved the ultra-low detection limit of 0.002 mu M and the linear range of 0.04-647.7 mu M in sensing of MTZ. Mo2C/f-CNF/GCE was successfully for real time detection in human urine samples. All the electrochemical results clearly proved that the Mo2C/f-CNF composite is an effective electrode for detection of MTZ.
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关键词
Scanning Electrochemical Microscopy,Nanofibers,Nanostructured Materials,Nano-composites,Electrochemical Biosensors
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