Ding Baojun, Zhang Qiunan, Yang Cheng, Yang Wenbo, Liu Junbo, Li Chong, Tao Shengyang
Department of Chemistry, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024 Liaoning, P.R. China.
ACS Omega. 2021 May 4;6(19):12470-12479. doi: 10.1021/acsomega.0c06274. eCollection 2021 May 18.
Nowadays, heavy metal pollution has attracted wide attention. Many electrochemical methods have been developed to detect heavy metal ions. The electrode surface usually needs to be modified, and the process is complicated. Herein, we demonstrate the fabrication of electrodes by direct laser sintering on commercial polymer films. The prepared porous carbon electrodes can be used directly without any modification. The electrodes were fixed in a 3D-printed flow reactor, which led to very little analyte required during the detection process. The velocities of the analyte under stirring and flowing conditions were simulated numerically. The results prove that flow detection is more conducive to improving detection sensitivity. The limit of detection is about 0.0330 mg/L for Pb. Moreover, the electrode has been proved to have good repeatability and stability.
如今，重金属污染已引起广泛关注。人们开发了许多电化学方法来检测重金属离子。电极表面通常需要进行修饰，且过程复杂。在此，我们展示了通过在商用聚合物薄膜上直接激光烧结来制备电极。所制备的多孔碳电极无需任何修饰即可直接使用。电极被固定在3D打印的流动反应器中，这使得检测过程中所需的分析物极少。对搅拌和流动条件下分析物的流速进行了数值模拟。结果证明流动检测更有利于提高检测灵敏度。铅的检测限约为0.0330 mg/L。此外，该电极已被证明具有良好的重复性和稳定性。
