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Performance Improvement of Acid Pretreated 3D‐printing Composite for the Heavy Metal Ions Analysis
Author(s) -
Shin JaeHong,
Seo KyeongDeok,
Park Hyun,
Park DeogSu
Publication year - 2021
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202100077
Subject(s) - polylactic acid , electrode , graphene , materials science , raman spectroscopy , composite number , x ray photoelectron spectroscopy , oxide , metal ions in aqueous solution , electrolyte , dielectric spectroscopy , graphite , analytical chemistry (journal) , metal , nuclear chemistry , chemical engineering , electrochemistry , composite material , nanotechnology , chemistry , chromatography , metallurgy , physics , engineering , optics , polymer
The performance enhancement of 3D‐printed electrode comprised of polylactic acid (PLA) and graphite (Gr) doped with graphene oxide (GO) was studied to detect five heavy metal ions in trace level. The pretreatment of PLA/Gr/GO electrode with potential cycling in H 2 SO 4 solution achieved the most sensitive response. The characteristics of the composite electrodes were verified using XPS, FE‐SEM, EDXS, Raman, and impedance spectroscopy. The experimental variables affecting the response current were optimized with respect to pH, deposition time, ratio of PLA/Gr/GO, and supporting electrolytes. The pretreated 3D‐PLA/Gr/GO electrode showed a wide dynamic range from 0.5 ppb to 1.0 ppm with low detection limits of 0.039–0.13 ppb. The reliability of the PLA/Gr/GO electrode was evaluated by analyzing the reference samples of European Reference Materials.