Article

Rapid CO2-laser scribing fabrication of an electrochemical sensor for the direct detection of Pb2+ and Cd2+

Guanglei ChuDepartment of Materials Science and Engineering, National University of Singapore, No. 21 Lower Kent Ridge Road, Singapore, 119077, SingaporeYanyan ZhangSchool of Agriculture Engineering and Food Science, Shandong University of Technology, Zibo, 255049, ChinaZhongrui ZhouSchool of Agriculture Engineering and Food Science, Shandong University of Technology, Zibo, 255049, ChinaWeixuan ZengHunan Agricultural Equipment Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, ChinaDongfei ChenSchool of Chemistry, University of New South Wales, Sydney, NSW, 2052, AustraliaSiping YuHunan Agricultural Equipment Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, ChinaJiemin WangHunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, ChinaYemin GuoSchool of Agriculture Engineering and Food Science, Shandong University of Technology, Zibo, 255049, ChinaXia SunSchool of Agriculture Engineering and Food Science, Shandong University of Technology, Zibo, 255049, ChinaMing LiHunan Agricultural Equipment Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China

2023en

ABI

Abstract

Laser-induced graphene (LIG) is a highly promising preparation material for electrochemical sensors; however, its preparation speed and nanomaterial modification steps significantly limit its mass production. Herein, this study proposed a new laser printing strategy that considerably improved the preparation speed of LIG with excellent electrochemical performance. Using the optimal parameters (laser power of 1%, scribing spacing of 0.12 mm, and scribing speed of 100 mm·s −1 ), it took only 14.2 s to complete the preparation of the detection electrode. Thus, we successfully detected Cd 2+ and Pb 2+ without any toxic reagents or electrode modification steps. The limits of detection of the sensor were 0.914 and 0.916 µg·L −1 for Cd 2+ and Pb 2+ , respectively, which are significantly lower than the required values for drinking-water quality, according to the World Health Organization guidelines. This study provides a novel approach for the rapid detection of heavy-metal ions.

Identifiers

DOI: 10.1007/s12274-023-5471-y

Citations and references

Cited by 20 references

Metrics — AkademScholar