Abstract A hydroxylated carbon nanotubes/platinum nanoparticles/rhodamine B nanocomposite modified glass carbon electrode (CNTs-OH/PtNPs/RhB/GCE) was developed by a simple and environment-friendly method to determine 2,4,6-trichlorophenol (2,4,6-TCP) and 4-chlorophenol (4-CP), which usually coexist and interfere with each other. Owing to the excellent electron transfer and catalytic property, the CNTs-OH/PtNPs/RhB/GCE significantly facilitated the electro-oxidation of 2,4,6-TCP and 4-CP. The enhanced oxidation peak currents of the two chlorophenols were simultaneously determined with relatively large separation of peak potential (91 mV). Under optimized conditions, the sensor showed a linear response toward 2,4,6-TCP in the range of 5.0–175.0 μM with the detection limit of 1.55 μM (S/N = 3). The linear concentration range for 4-CP was 10.0–300.0 μM, and the detection limit was 3.69 μM (S/N = 3). Furthermore, the proposed sensor was successfully used for the analysis of 2,4,6-TCP and 4-CP in water samples with the recoveries of 96.8–102.8% and 95.6–103.2%, indicating a promising potential in practical application.

中文翻译：

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基于羟基化碳纳米管/铂纳米粒子/罗丹明B复合材料的电化学传感器同时测定2,4,6-三氯苯酚和4-氯苯酚

摘要 采用一种简单环保的方法开发了羟基化碳纳米管/铂纳米粒子/罗丹明 B 纳米复合修饰玻璃碳电极（CNTs-OH/PtNPs/RhB/GCE），用于测定 2,4,6-三氯苯酚（2,4 ,6-TCP) 和 4-氯苯酚 (4-CP)，它们通常共存并相互干扰。由于优异的电子转移和催化性能，CNTs-OH/PtNPs/RhB/GCE 显着促进了 2,4,6-TCP 和 4-CP 的电氧化。两种氯酚的增强氧化峰电流是通过相对较大的峰电位分离 (91 mV) 同时测定的。在优化条件下，传感器对 2,4,6-TCP 的线性响应范围为 5.0-175.0 μM，检测限为 1.55 μM（S/N = 3）。4-CP 的线性浓度范围为 10.0-300。0 μM，检测限为 3.69 μM (S/N = 3)。此外，所提出的传感器已成功用于分析水样中的 2,4,6-TCP 和 4-CP，回收率分别为 96.8-102.8% 和 95.6-103.2%，表明在实际应用中具有广阔的潜力。