Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao East Rd, Taipei, 106, Taiwan.
Mikrochim Acta. 2022 Apr 29;189(5):205. doi: 10.1007/s00604-022-05305-6.
Novel cube-like transition metal oxide embedded on graphitic carbon nitride (MCO@GCN) formed a hybrid composite via hydrothermal assisted sonochemical synthesis. The synthesized composite was examined with various physical characterizations such as morphological SEM, EDX, XRD, and FT-IR spectroscopy. The electrocatalytic activity of MCO@GCN composite was further investigated when used to modify a glassy carbon electrode (GCE). The electrochemical sensor was investigated using modified MCO@GCN/GCE towards environmental pollutant 2,4,6-trichlorophenol (2,4,6-TCP) detection with at a potential of (+ 0.654 V vs Ag/AgCl) in pH-7. The structural features have favored a high charge transfer ratio with excellent conductivity which showed a low detection limit (LOD) of 0.0068 μM and sensitivity of 23.57 μA·μM·cm comprising a wide linear working range of 0.01-1720 μM by using differential pulse voltammetry. Besides, the MCO@GCN/GCE displayed excellent selectivity , repeatability, reproducibility, storage, and operational stability. Notably, the proposed MCO@GCN/GCE was validated with different environmental samples (tap, river, and industrial water) with RSD 0.62-2.86% and 96.51-99.66% (n = 3) recovery.
通过水热辅助声化学合成，在石墨相氮化碳（GCN）上形成了一种新型的立方过渡金属氧化物嵌入的混合复合材料（MCO@GCN）。通过各种物理特性进行了合成复合材料的检查，例如形貌 SEM、EDX、XRD 和 FT-IR 光谱。进一步研究了 MCO@GCN 复合材料作为修饰玻碳电极（GCE）时的电催化活性。使用修饰后的 MCO@GCN/GCE 作为电化学传感器，在 pH-7 下，在（相对于 Ag/AgCl 为 +0.654 V）的电势下，对环境污染物 2,4,6-三氯苯酚（2,4,6-TCP）进行检测。结构特征有利于高电荷转移比和优异的导电性，其检测限（LOD）低至 0.0068 μM，灵敏度为 23.57 μA·μM·cm，包括使用差分脉冲伏安法的 0.01-1720 μM 的宽线性工作范围。此外，MCO@GCN/GCE 表现出出色的选择性、重复性、重现性、存储和操作稳定性。值得注意的是，该提议的 MCO@GCN/GCE 已通过不同的环境样品（自来水、河水和工业用水）进行了验证，其 RSD 为 0.62-2.86%，回收率为 96.51-99.66%（n=3）。
