【摘要】 室温下以硝酸钬为金属源,均苯三甲酸为有机配体,通过一步共混法制备出形貌均一的棒状稀土基金属有机框架材料（Ho-MOF）,在玻碳电极基底上,采用两步滴涂法制备Ho-MOF-NIP复合修饰电极,成功构建了用于检测Pb²⁺的电化学传感器（Ho-MOF-NIP/GCE）。采用差分脉冲阳极溶出伏安法（DPASV）研究了Pb²⁺在该修饰电极上的电化学行为。实验结果表明:该电极对Pb²⁺的检测灵敏度显著提升,在0.1～1 mmol·L^-1范围内,氧化峰电流值与Pb²⁺的浓度呈现良好的线性关系,检测限为7μmol·L^-1（S/N=3）,该方法可用于水样中Pb²⁺的快速检测。更多还原

【Abstract】 One-step blending of Ho（NO₃）₃ as a metal source and H₃BTC as an organic ligand at room temperature resulted in the preparation of a homogeneous rod-shaped rare-earth-based metal-organic framework material（Ho-MOF）.The Ho-MOF-NIP composite modified electrode was prepared by a two-step drop-coating method on a glassy carbon electrode substrate,and then an electrochemical sensor（Ho-MOF-NIP/GCE） was successfully constructed for the detection of Pb²⁺.The electrochemical behaviour of Pb²⁺at this modified electrode was investigated by using differential pulsed anodic dissolution voltammetry（DPASV）.The experimental results showed that the sensitivity of the electrode for the detection of Pb²⁺ was significantly improved,and the oxidation peak current value showed a good linear relationship with the concentration of Pb²⁺ in the range of 0.1～1 mmol·L^-1.The detection limit was 7 μmol·L^-1（S/N=3）,which can be used for the rapid detection of Pb²⁺ in water samples.更多还原