基于双配体金属有机骨架电化学传感食品包装中迁移的壬基酚

该研究制备了一种基于铁基金属有机骨架负载于高导电石墨烯（Fe-HHTP-HITP-HCG）的电化学传感器测定痕量的壬基酚（NP）。双配体金属有机骨架（Fe-HHTP-HITP）在高导电石墨烯（HCG）的空隙中生长而成Fe-HHTP-HITP-HCG，然后通过滴涂成膜的方式制成电化学传感器；考察了缓冲液的种类、pH值、配体比例、HCG比例、累积电位、累积时间等实验条件；采用循环伏安法（CV）、场发射扫描电子显微镜（SEM）、傅立叶红外光谱（FT-IR）和X射线衍射（XRD）对电极的性能进行了评价。实验显示，Fe-HHTP-HITP-HCG具有较高的电化学活性与催化活性，有良好的响应作用。实验结果显示，当涂层为4层时，NP的检测浓度范围为1.0×10-7 mol/L~1.0×10-4 mol/L，检出限为1.22×10-8 mol/L。该传感器应用于牛奶袋迁移出的NP时，其加标回收率范围为96.90%~102.00%。因此，实验提出了一种利用金属有机骨架复合材料进行NP灵敏度检测的新策略。

Electrochemical Sensing of Migrating Nonylphenols in Food Packaging Based on Double-ligand Metal-organic Frameworks

An electrochemical sensor based on Fe-based metal-organic framework supported on highly conductive graphene (Fe-HHTP-HITP-HCG) was prepared for the determination of trace nonylphenol (NP). Double-ligand metal-organic framework (Fe-HHTP-HITP) was grown in the empty spaces of highly conductive graphene (HCG) to form Fe-HHTP-HITP-HCG, and the electrochemical sensor was then made by drop-coating to form a film. The experimental conditions, namely the type of buffer, pH value, ligand ratio, HCG ratio, cumulative potential and cumulative time were investigated. The properties of the electrodes were evaluated through the use of cyclic voltammetry (CV), field emission scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The results of the experiments showed that Fe-HHTP-HITP-HCG had high electrochemical and catalytic activity and has good response. When the coating was four layers, the detection concentration of NP ranged from 1.0×10-7 to 1.0×10-4 mol/L, and the limit of detection was 1.22×10-8 mol/L. When the sensor was applied to NP that migrated from the milk bag, the standard addition recovery rate ranged from 96.90% to 102.00%. Based on these results, a new strategy for NP-sensitive detection using metal-organic framework composites is proposed.