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All Journal Acta Aquatica: Aquatic Sciences Journal Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) Jurnal Segara Hikmah Makara Journal of Science Global Komunika : Jurnal Ilmu Sosial dan Ilmu Politik Journal of Marine Studies JURNAL PENGABDIAN PEMBANGUNAN PERTANIAN DAN LINGKUNGAN (JP3L)
Munawar Khalil
Program Studi Budidaya Perairan, Fakultas Pertanian, Universitas Malikussaleh. Kampus Utama Reuleut Kabupaten Aceh Utara. Aceh.
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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Electrochemical Sensors Based on Graphene Oxide/PEDOT:PSS Composite Decorated with Bimetallic Gold–Silver Nanoparticles for H2O2 Detection Hidayat, Rayyan Azzahra; Putra, Budi Riza; Khalil, Munawar; Wahyuni, Wulan Tri
Makara Journal of Science Vol. 29, No. 4
Publisher : UI Scholars Hub

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Abstract

Hydrogen peroxide (H2O2) is a biomarker that indicates oxidative stress levels in the human body; thus, rapid and accurate detection methods are necessary to diagnose various disorders. This study developed a nonenzymatic electrochemical sensor for detecting H2O2 using bimetallic gold–silver nanoparticles (Au–Ag NPs) combined with graphene oxide and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)-modified glassy carbon electrode. The surface properties of the modified electrodes were characterized using scanning electron microscopy–energy dispersive spectroscopy and atomic force microscopy. The electrochemical performance of the modified electrodes was evaluated using cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. The bimetallic Au-Ag NP-modified electrodes exhibited a higher current response to H2O2 than their monometallic counterparts. The sensor demonstrated a linear response at the H2O2 concentration of 75–200 μM, with a sensitivity of 0.0407 μA μM⁻¹ and a detection limit of 25 μM. Moreover, the modified electrodes demonstrated excellent selectivity for H2O2 and high repeatability of measurements (relative standard deviation < 5%). The detection of H2O2 levels in synthetic urine samples yielded results that were not significantly different from those obtained by the spectrophotometry method, indicating the potential of the developed sensor for clinical applications.
Co-Authors Andika, Maulana AYU LESTARI A’kla, Cut Meurah Nurul Baehaqi Budi Riza Putra Dewi Sri Jayanti Erita Hayati Erlangga Erlangga Eva Ayuzar, Eva Fikrinda Fikrinda Habib EY, M. Handayani, Lusia Helmi Yanti, Helmi Hidayat, Rayyan Azzahra Ikhsan, Nur Indradewa, Rhian Ja'far, Ja'far Juliaviani, Noratun Kafi, Siti Umayyah Khairul Anwar Kukuh Nirmala Lastri, Lastri Mahdalena, Vina Muhammad Nasir Muhammad Yasar Muliani Muliani, Muliani Mulyadi Mulyadi Nella Tri Agustini, Nella Tri Nurwijayanti Pane, Andina Ramadhani Putri Raida Agustina Ramadhani, Ita RIDWAN AFFANDI Rika Anggraini Riri Ezraneti Rusydi, Rachmawaty Ruzanna, Arina Saifullah Saifullah Siti Hafsah SYAHRIAL SYAHRIAL Syamsiar, Syamsiar Wulan Tri Wahyuni Yessy, Lailan Try Zainal Abidin Zainura, Zainura Zuraida Zuraida