Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Study of an electrochemical analysis method for Indole-3-Acetic Acid based on reduced graphene oxide composite catalyst coated screen-printed carbon electrode

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

  • Yoo-Jin Weon (Surface Technology Division, Korea Institute of Materials Science) ;
  • Min-Yeong Kim (Surface Technology Division, Korea Institute of Materials Science) ;
  • Young-Bae Park (School of Materials Science and Engineering, Andong National University) ;
  • Kyu Hwan Lee (Surface Technology Division, Korea Institute of Materials Science)
  • 원유진 (한국재료연구원 표면기술본부) ;
  • 김민영 (한국재료연구원 표면기술본부) ;
  • 박영배 (국립안동대학교 반도체.신소재공학과 청정에너지 소재기술연구센터) ;
  • 이규환 (한국재료연구원 표면기술본부)
  • Received : 2024.04.16
  • Accepted : 2024.07.16
  • Published : 2024.08.31
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Abstract

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.

Keywords

Acknowledgement

This work was supported by the Miryang-si (PICP120)

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