Department of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.
Sensors (Basel). 2019 Mar 29;19(7):1531. doi: 10.3390/s19071531.
Titanium carbide (TiC) is a very significant transition metal carbide that displays excellent stability and electrical conductivity. The electrocatalytic activity of TiC is similar to noble metals but is much less expensive. Herein, carbon nanofibers (CNFs)-supported TiC nanoparticles (NPs) film (TiC/C) is prepared by electrospinning and carbothermal processes. Well-dispersed TiC NPs are embedded tightly into the CNFs frameworks. The electrochemical oxidation of pyrimethanil (PMT) at the TiC/C-modified electrode displays enhanced redox properties, and the electrode surface is controlled simultaneously both by diffusion and adsorption processes. When TiC/C is applied for PMT determination, the as-fabricated sensor shows good sensing performance, displaying a wide linear range (0.1⁻600 μM, R² = 0.998), low detection limit (33 nM, S/N = 3), and good reproducibility with satisfied anti-interference ability. In addition, TiC/C shows long-term stability and good application in natural samples. The facile synthetic method with good sensing performance makes TiC/C promising as novel electrode materials to fabricate efficient sensors.
碳化钛 (TiC) 是一种非常重要的过渡金属碳化物，具有优异的稳定性和导电性。TiC 的电催化活性类似于贵金属，但价格要便宜得多。本文通过静电纺丝和碳热工艺制备了碳纤维 (CNFs) 负载的碳化钛纳米颗粒 (TiC/NPs) 薄膜 (TiC/C)。TiC/NPs 分散良好并紧密嵌入到 CNFs 骨架中。TiC/C 修饰电极上嘧啶苯胺 (PMT) 的电化学氧化显示出增强的氧化还原性能，并且电极表面同时受到扩散和吸附过程的控制。当 TiC/C 用于 PMT 测定时，所制备的传感器显示出良好的传感性能，具有较宽的线性范围 (0.1⁻600 μM, R² = 0.998)、低检测限 (33 nM, S/N = 3) 以及良好的重现性和令人满意的抗干扰能力。此外，TiC/C 表现出长期稳定性，并在天然样品中具有良好的应用前景。这种具有良好传感性能的简便合成方法使 TiC/C 有望成为制备高效传感器的新型电极材料。
