ZIF-8/碳纳米管复合材料的制备及其用于4-氯苯酚电化学传感

Preparation of ZIF-8/Carbon Nanotubes Composite and Its Application in Electrochemical Sensing of 4-Chlorophenol

以聚乙烯吡咯烷酮K30为分散剂,碳纳米管(CNTs)为导电增强材料,二水合乙酸锌和2-甲基咪唑(MeIM)为前驱体,合成出一种Zn-MeIM金属有机框架材料(ZIF-8)与CNTs的复合材料(ZIF-8@CNTs)。研究表明,与ZIF-8及CNTs相比,所制备的ZIF-8@CNTs对4-氯苯酚(4-CP)的电化学氧化表现出显著的增敏效应。基于此,建立了一种高灵敏的4-CP电化学传感方法,其线性范围为0.1~6.0μmol/L,检出限(S/N=3)为0.04μmol/L。将该传感器用于污水样品中4-CP的检测,其测定结果与高效液相色谱法基本一致。

A nanocomposite of metal organic framework material(ZIF-8)and multi-walled carbon nanotubes(ZIF-8@CNTs)was synthesized using polyvinylpyrrolidone K30-dispersed CNTs conducting materials and zinc acetate dihydrate and 2-methylimidazole(MeIM)precursors.Compared with ZIF-8 or CNTs alone,ZIF-8@CNTs was demonstrated to possess superior electrochemical sensing performance toward the oxidation of 4-chlorophenol(4-CP).Based on this,a highly-sensitive electrochemical sensing method was developed for 4-CP,with a linear range of 0.1-6.0μmol/L and a detection limit of 0.04μmol/L(S/N=3).This sensor was applied to the analysis of waste water samples,and the results were consisted with those obtained by high performance liquid chromatography.