Karya Ilmiah
ZnO-Enhanced Reduced Graphene Oxide Electrodes from Cocoa Shell: Nanoarchitectonics Platform for Photoelectrocatalytic Detection of Methylene Blue
Thamrin Azis1, Muhammad Zakir Muzakkar1, Andi Tenri Nurwahida2, Nasriadi Dali1,
La Ode Abdul Kadir1, Dian Ayu Lestari1, and La Ode Agus Salim3
In this study, we report the successful preparation of reduced graphene oxide modified zinc oxide
(rGO-ZnO) composites from cocoa shells. Synthesis of rGO-ZnO was carried out using the Hummer
method and thermal reduction. The electrode material was comprehensively characterized using fouriertransform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy & Energy Dispersive X-ray (SEM-EDX). The photoelectrocatalytic performance of the prepared composite
electrodes was evaluated using various electrochemical techniques, including Linear Sweep Voltammetry (LSV), Cyclic Voltammetry (CV), and Multi Pulse Amperometry (MPA). The FTIR analysis of rGO-ZnO exhibited distinct bands corresponding to C-O at 1022 cm–1, C=C at 1600 cm–1, and Zn-O at 455 cm–1. The XRD analysis revealed characteristic peaks at 26.6, 29.2, 36.2, 44.04, 47.58, and 64.4, confirming the presence of key crystalline phases. SEM-EDX analysis of rGO-ZnO revealed a rough surface morphology with bright white and black regions, signifying the coexistence of ZnO and rGO with carbon, oxygen, and zinc contents of 78.98%, 17.46%, and 3.56%, respectively. The investigations involved the photoelectrochemical profiles of methylene blue organic dyes at different concentrations, ranging from 0.5 ppm to 3.0 ppm. The acquired findings offer valuable understanding into the photoelectrocatalytic effectiveness of the composite electrodes containing rGO-ZnO, suggesting their potential use in potential scenarios involving the revitalization of the environment in industrial water systems
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Diterbitkan pada: Journal of Oleo Science
Copyright ©2023 by Japan Oil Chemists’ Society
J-STAGE Advance Publication date : September 28, 2023
doi : 10.5650/jos.ess23152
J. Oleo Sci.
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