환원 그래핀 옥사이드 복합 촉매가 코팅된 스크린 프린트 탄소전극 기반 Indole-3-Acetic Acid 전기화학분석법 연구

• Published in: Biuletyn Uniejowski Vol. 57; no. 4; pp. 265 - 273
• Main Authors: 원유진(Yoo-Jin Weon), 김민영(Min-Yeong Kim), 박영배(Young-Bae Park), 이규환(Kyu Hwan Lee)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2024
• Subjects: Polyethyleneimine; Electrochemical sensor; Conducting polymer composite; Indole-3-Acetic Acid; Reduced graphene oxide aerogel
• ISSN: 1225-8024; 2299-8403; 2288-8403

An amperometric sensor for measuring indole-3-acetic acid (IAA) was studied based on a screen-printed carbon electrode (SPCE) coated with a reduced graphene oxide composite electrocatalyst. The PEI-GO dispersion is uniformly formed through a nucleophilic substitution reaction between the active amine group of Polyethyleneimine (PEI) and the epoxide group exposed on the surface of graphene oxide. And The 3-dimensional PEI-rGO AG (Polyethyleneimine-reduced graphene oxide aerogel) complex was easily prepared through simple heat treatment of the combined PEI-GO dispersion. The proposed composite catalyst electrode, PEI-rGO AG/SPCE, showed a two linear relationship in the low and high concentrations in IAA detection, and the linear equation was Ipa = 0.2883C + 0.0883 (R2=0.9230) at low concentration and Ipa = 0.00464C + 0.6623 (R2=0.9894) at high concentration was proposed, and the detection limit was calculated to be 203.5nM±33.2nM. These results showed the applicability of the PEI-rGO AG composite catalyst as an electrode material for electrocatalysts for the detection of IAA.