Simple laser-induced graphene fiber electrode fabrication for high-performance heavy-metal sensing
- Authors
- Jeong, Seong-Eun; Kim, Saeyoung; Han, Ji-Hoon; Pak, James Jungho
- Issue Date
- 1월-2022
- Publisher
- ELSEVIER
- Keywords
- Heavy metal sensor; Simple fabrication; High performance; Laser-induced graphene (LIG); Laser-induced graphene fiber (LIGF); Bismuth
- Citation
- MICROCHEMICAL JOURNAL, v.172
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROCHEMICAL JOURNAL
- Volume
- 172
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/135294
- DOI
- 10.1016/j.microc.2021.106950
- ISSN
- 0026-265X
- Abstract
- In this paper, we describe the simple fabrication and characterization of a high-performing heavy metal sensor by using laser-induced graphene fiber (LIGF) electrodes for simultaneous detection of cadmium (Cd2+) and lead (Pb2+) ions. Both LIG and LIGF were grown via extremely simple and fast method, compared to conventional graphene synthesis, on a commercial polyimide film by irradiating CO2 infrared laser with the appropriate energy level (46 J/cm(2) in this work). Fabricated LIG and LIGF were analyzed by FE-SEM and Raman spectroscopy, which showed that the LIGF structure was composed of randomly stacked three-dimensional porous graphene layers and fibers. On the surface of the LIGF working electrode, bismuth was electro-deposited in-situ for the electrochemical detection of heavy metal ions. The fabricated LIGF electrode heavy metal sensor was used for the simultaneous detection of Cd and Pb ions in 0.1 M acetate buffer solution at pH 4.5 by square wave anodic stripping voltammetry. The fabricated LIGF-based heavy-metal sensor showed high sensitivity (0.19 and 0.20 mu A mu g(-1) L for Cd and Pb ions), broad linear detection ranges (1.0 to 140.0 mu g/L for Cd and Pb ions), and low detection limits (0.4 mu g/L (S/N = 3) for both Cd and Pb ions), showing great promise in high-performance heavy metal detection applications that require fast and simple manufacturing practices.
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