Abstract A new strategy was developed for the construction of a multilayered chemical modified electrode. The electrode was modified with two layers of carbon nanotubes conglutinated by polydopamine embedded with β-cyclodextrin. The practicability of the designed electrode was validated by the determination of catechol as a model molecule. Using the multilayered electrode, the redox peak currents in cyclic voltammetry for catechol were enhanced significantly compared with an electrode modified with single-layer carbon nanotubes. With the amount of added β-cyclodextrin and pH optimized, the peak currents showed good linear relationship with concentrations of catechol in the range from 2.50 × 10−7 to 4.00 × 10−3 mol·L−1 with a detection limit of 4.00 × 10−8 mol·L−1 based on a signal-to-noise ratio equal to three. The recovery values for spiked tap water and lake water were also satisfactory.

中文翻译：

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基于聚多巴胺粘合的碳纳米管的多层化学修饰电极：用于测定邻苯二酚的电化学信号增强的新策略

摘要 提出了一种构建多层化学修饰电极的新策略。电极用两层碳纳米管修饰，由嵌入β-环糊精的聚多巴胺粘合。通过确定邻苯二酚作为模型分子，验证了所设计电极的实用性。使用多层电极，与用单层碳纳米管修饰的电极相比，儿茶酚循环伏安法中的氧化还原峰值电流显着增强。随着β-环糊精的添加量和pH值的优化，峰值电流与邻苯二酚浓度在2.50×10-7至4.00×10-3 mol·L-1范围内表现出良好的线性关系，检测限为4.00× 10-8 mol·L-1 基于等于 3 的信噪比。