纳米金/碳电极对4-氯酚电化学检测机制的研究  

Electrochemicalanalysis of 4-Chlorophenol on nano-carbon materials complexed with gold nanoparticles

作　　者：谢雨宸 陈佰韬 裴鑫龙 孙萌 季双杰 朱洪[1] XIE Yuchen;CHEN Baitao;PEI Xinlong;SUN Meng;JI Shuangjie;ZHU Hong(College of Bioscience and Resource Environment,Beijing University of Agriculture,Beijing 102206,China;Beijing HiBio Science and Technology Inc,Beijing 102208,China)

机构地区：[1]北京农学院生物与资源环境学院,北京102206 [2]北京华仞生物科技有限公司,北京102208

出　　处：《北京农学院学报》2023年第3期46-51,共6页Journal of Beijing University of Agriculture

基　　金：北京农学院大学生科研项目(KX20230104)。

摘　　要：【目的】4氯酚(4-CP)是典型的环境有毒有害污染物,拟制备高效灵敏的4-CP新型电化学传感器。【方法】基于不同的纳米碳基材料[单壁碳纳米管(Single-walled carbon nanotubes,SWCNTs)、石墨烯(Thin graphene,GR)]进行组合,结合纳米金颗粒(Gold nanoparticles,GNPs),以1-丁基-3-甲基咪唑四氟硼酸盐(BmimBF 4)为辅助粘合剂进行玻碳电极(Glass carbon electrode GCE)的修饰,比较所得修饰电极对4-CP的电化学检测性能。【结果】通过分析修饰电极对4-氯酚(4-Chloro phenol,4-CP)电化学峰电位及峰电流,与纳米碳基材料的关系,构建氯酚在纳米碳基材料表面的动力学传质路径,借助电镜表征手段,表征纳米碳基材料对有机氯酚可能的催化作用机理,获得高效稳定的氯酚电化学传感器,并对纳米碳材料与催化机理关系形成新颖的认识。【结论】所获得纳米碳基与纳米金复合材料制备的氯酚电化学传感器在pH为3的溶液中采用CV法对4-CP的检测线性范围为5.0~480μmol/L,检出限低至1.5μmol/L,优于大多数传统4-CP的检测方法。该4-CP传感器在实际水样中的加标回收实验中,回收率在98%~103%。[Objective]4-chlorophenol(4-CP)is a typical environmental toxic and harmful pollutant,this paper aims to prepare an efficient and sensitive 4-CP electrochemical sensor.[Methods]In this study,Nano-carbon Materials(single-walled carbon nanotubes and graphene)were mixed,then combined with Gold nanoparticles,and with BmimBF 4 as an auxiliary adhesive to make the sensors.Comparing performance of sensors,analyzing the differences among peak potential and peak current,the possible catalytic mechanism of electrochemical reduction 4-CP on nano-carbon based materials was characterized.[Results]The morphology of nano-carbon,the kinetic mass transfer path on the surface were studied in detail.An efficient and stable nonenzymatic electrochemical sensor was obtained.[Conclusion]The 4-CP detecting sensor prepared got a linear range of 5.0~480μmol/L and a detection limit as low as 1.5μmol/L in a solution with a pH 3 using CV method,which is better than most reported electrochemical methods.The recovery rate of the sensor in the spiked recovery experiment was 98%~103%.

关 键 词：4-氯酚 单壁碳纳米管 石墨烯 纳米金颗粒 电化学传感器 

分 类 号：X505[环境科学与工程—环境工程]