Lei Ling, Li Caoling, Huang Wensheng, Wu Kangbing
Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Chemistry and Environmental Engineering, Hubei University for Nationalities, Enshi 445000, China.
Analyst. 2021 Dec 6;146(24):7593-7600. doi: 10.1039/d1an01799c.
Developing a sensitive and rapid detection method for 4-chlorophenol (4-CP) and 4-nitrophenol (4-NP) is very important due to their high toxicity. In this work, bulk TiAlC powder was etched to TiCT for the first time through a hydrothermal reaction in NaF/HCl solution. After ultrasonication in -methylpyrrolidone (NMP), TiCT powder was successfully exfoliated into multilayered TiCT nanosheets ( TiCT MXene). The prepared TiCT MXene not only has a large electrochemical surface area for the oxidation of 4-CP and 4-NP, but also lowers their electron transfer resistance. As a result, the oxidation signals of 4-CP and 4-NP are significantly improved on the surface of the TiCT MXene. Based on the remarkable signal amplification of the TiCT MXene, a sensitive and rapid method was developed for the simultaneous detection of 4-CP and 4-NP. The linear range is from 0.1 to 20.0 μM for 4-CP, and from 0.5 to 25.0 μM for 4-NP, with detection limits of 0.062 μM (4-CP) and 0.11 μM (4-NP). This method was used in wastewater samples, and the accuracy was confirmed to be good by high-performance liquid chromatography.
由于4-氯苯酚（4-CP）和4-硝基苯酚（4-NP）具有高毒性，开发一种灵敏且快速的检测方法非常重要。在这项工作中，首次通过在NaF/HCl溶液中的水热反应将块状TiAlC粉末蚀刻成TiCT。在N-甲基吡咯烷酮（NMP）中超声处理后，TiCT粉末成功剥离成多层TiCT纳米片（TiCT MXene）。制备的TiCT MXene不仅具有用于4-CP和4-NP氧化的大电化学表面积，还降低了它们的电子转移电阻。结果，4-CP和4-NP在TiCT MXene表面的氧化信号显著改善。基于TiCT MXene显著的信号放大作用，开发了一种灵敏且快速的同时检测4-CP和4-NP的方法。4-CP的线性范围为0.1至20.0μM，4-NP的线性范围为0.5至25.0μM，检测限分别为0.062μM（4-CP）和0.11μM（4-NP）。该方法用于废水样品检测，通过高效液相色谱法确认其准确性良好。
