Aug, 31, 2024

Vol.57 No.4

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Review

  • The Korean Society of Surface Science and Engineering
  • Volume 57(4); 2024
  • Article

Review

The Korean Society of Surface Science and Engineering 2024;57(4):265-273. Published online: Sep, 9, 2024

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DOI : 10.5695/JSSE.2024.57.4.265

Study of an electrochemical analysis method for Indole-3-Acetic Acid based on reduced graphene oxide composite catalyst coated screen-printed carbon electrode

  • Yoo-Jin Weona,c, Min-Yeong Kima, Young-Bae Parkc* and Kyu Hwan Leea,b*
    aSurface Technology Division, Korea Institute of Materials Science, 797 Changwon-daero, Seongsan-gu, Changwon, Gyeongsangnam-do, 51508, Republic of Korea bAdvenced Materials Engineering, Korea University of Science and Technology, 217 Gajeong-ro, Yuesong-gu, Changwon, Deajeon 34113, Republic of Korea cSchool of Materials Science and Engineering, Andong National University, 1375, Gyeongdong-ro, Andong-si, Gyeongsangbuk-do, 36729, Republic of Korea
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 Indole-3-Acetic Acid, Electrochemical sensor, Reduced graphene oxide aerogel, Conducting polymer composite, Polyethyleneimine