Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan.
Institute of Materials Science and Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan.
Sensors (Basel). 2023 Jun 17;23(12):5668. doi: 10.3390/s23125668.
In the current work, copper tungsten oxide (CuWO) nanoparticles are incorporated with carbon nanofiber (CNF) to form CNF/CuWO nanocomposite through a facile hydrothermal method. The prepared CNF/CuWO composite was applied to the electrochemical detection of hazardous organic pollutants of 4-nitrotoluene (4-NT). The well-defined CNF/CuWO nanocomposite is used as a modifier of glassy carbon electrode (GCE) to form CuWO/CNF/GCE electrode for the detection of 4-NT. The physicochemical properties of CNF, CuWO, and CNF/CuWO nanocomposite were examined by various characterization techniques, such as X-ray diffraction studies, field emission scanning electron microscopy, EDX-energy dispersive X-ray microanalysis, and high-resolution transmission electron microscopy. The electrochemical detection of 4-NT was evaluated using cyclic voltammetry (CV) the differential pulse voltammetry detection technique (DPV). The aforementioned CNF, CuWO, and CNF/CuWO materials have better crystallinity with porous nature. The prepared CNF/CuWO nanocomposite has better electrocatalytic ability compared to other materials such as CNF, and CuWO. The CuWO/CNF/GCE electrode exhibited remarkable sensitivity of 7.258 μA μM cm, a low limit of detection of 86.16 nM, and a long linear range of 0.2-100 μM. The CuWO/CNF/GCE electrode exhibited distinguished selectivity, acceptable stability of about 90%, and well reproducibility. Meanwhile, the GCE/CNF/CuWO electrode has been applied to real sample analysis with better recovery results of 91.51 to 97.10%.
在当前的工作中，通过简便的水热法将铜钨氧化物（CuWO）纳米颗粒与碳纳米纤维（CNF）结合，形成 CNF/CuWO 纳米复合材料。制备的 CNF/CuWO 复合材料被应用于电化学检测危险有机污染物 4-硝基甲苯（4-NT）。将定义明确的 CNF/CuWO 纳米复合材料用作玻璃碳电极（GCE）的修饰剂，以形成用于检测 4-NT 的 CuWO/CNF/GCE 电极。通过各种表征技术，如 X 射线衍射研究、场发射扫描电子显微镜、EDX-能量色散 X 射线微分析和高分辨率透射电子显微镜，研究了 CNF、CuWO 和 CNF/CuWO 纳米复合材料的物理化学性质。使用循环伏安法（CV）和差分脉冲伏安法检测技术（DPV）评估了 4-NT 的电化学检测。上述 CNF、CuWO 和 CNF/CuWO 材料具有更好的结晶度和多孔性。与 CNF 和 CuWO 等其他材料相比，制备的 CNF/CuWO 纳米复合材料具有更好的电催化能力。CuWO/CNF/GCE 电极表现出显著的灵敏度为 7.258 μA μM cm、低检测限为 86.16 nM 和长线性范围为 0.2-100 μM。CuWO/CNF/GCE 电极表现出出色的选择性、约 90%的可接受稳定性和良好的重现性。同时，GCE/CNF/CuWO 电极已应用于实际样品分析，具有更好的回收率为 91.51 至 97.10%。
