| 埃洛石基离子印迹材料的制备及其镉离子传感性能 |
| Preparation and Cadmium Ion Sensing Properties of Ionic Imprinted Materials Based on HNTs |
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| 摘要: 用表面印迹聚合法制备了埃洛石纳米管（HNTs）基超支化镉离子印迹传感材料HNTs@ⅡPs。用傅立叶变换红外光谱（FTIR）、XRD、SEM、核磁及热重等方法表征材料的结构；利用循环伏安法（cyclic voltammetry，CV）、差分脉冲伏安法（differential pulse voltammetry，DPV）及交流阻抗法（electrochemical impedance spectroscopy，EIS）等考察了HNTs@ⅡPs的电化学性能及其对镉离子的特异性传感性能。结果表明成功合成了HNTs@ⅡPs，且在cCD2+≤0.125 μmol·L-1时，感应峰电流与镉离子浓度有良好的定量关系，检出限为0.026 μmol·L-1，印迹因子α为5.97，选择因子β为4.97，表明HNTs@ⅡPs对Cd2+具有专一性和强选择性。对阻抗谱分析结果拟合得到了传感器的电学等效电路模型，并分析阐明了传感机理。 |
| 关键词: 埃洛石 传感材料 镉离子 特异性 |
| 基金项目: 浙江省自然科学基金（No.LY18B070003）资助项目。 |
| Abstract: We used surface imprinting polymerization to prepare the sensing material HNTs@ⅡPs modified by hyperbranched imprinting polymers (HNTs=halloysite nanotubes). Fourier transform infrared spectroscopy (FTIR), XRD, SEM, nuclear magnetic and thermogravimetry proved that HNTs@ⅡPs was successfully synthesized. Then, we used cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy to investigate the electrochemical properties and specific sensing properties to cadmium ion of HNTs@ⅡPs. The results showed that when cCD2+≤ 0.125 μmol·L-1, the peak current of the sensing material had a good quantitative relationship with cCD2+, and the detection limit is 0.026 μmol·L-1. The imprinting factor was 5.97 and the selective factor was 4.97, which indicates that the HNTs@ⅡPs have specificity and strong selective adsorption to Cd2+. It suggests that HNTs@ⅡPs can be used to detect the concentration of Cd2+. The equivalent electrical circuit model of the sensor was obtained by fitting the results of impedance spectrum analysis and the sensing mechanism was analyzed and illustrated. |
| Keywords: halloysite nanotubes sensing material cadmium ions specificity |
| 投稿时间：2019-04-02 修订日期：2019-08-09 |
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| 胡莹露,卢闻君,郭明,王珏.埃洛石基离子印迹材料的制备及其镉离子传感性能[J].无机化学学报,2019,35(10):1755-1766. |
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