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All Journal Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Jurnal Kartika Kimia Bakti Cendana: Jurnal Pengabdian Masyarakat Jurnal Atma Inovasia Jurnal Inovasi Pengabdian dan Pemberdayaan Masyarakat Jurna Beta Kimia Bulletin of Chemical Reaction Engineering & Catalysis Journal of Chemical Science and Application Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Benu, Didi Prasetyo
Department Of Chemistry, Faculty Of Agriculture, Universitas Timor, Timor Tengah Utara, Indonesia Jl. El Tari - Km. 09,Timor Tengah Utara, East Nusa Tenggara, Indonesia
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Sustainable Green Synthesis of ZnO Photocatalysts Using Shallot Peel Extract as Capping Agent for Efficient Photodegradation of Rhodamine B Didi Prasetyo Benu; Cindy Claudia Christanti; I Gede Arya Wiguna; Fry Voni Steky; Veinardi Suendo
Jurnal Kartika Kimia Vol 9 No 1 (2026): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v9i1.1103

Abstract

Green synthesis strategies offer a sustainable approach for preparing semiconductor photocatalysts with tunable properties. In this study, ZnO particles were synthesized using shallot peel extract, and their structural, morphological, optical, and photocatalytic properties were systematically investigated. Structural characterization by Raman spectroscopy and X-ray diffraction confirmed the formation of phase-pure wurtzite ZnO, with crystallite sizes in the nanometer range. Scanning electron microscopy revealed hexagonal rod-like morphologies with dimensions of 1–2 μm, which are interpreted as polycrystalline assemblies of aggregated nanocrystallites. Optical analysis using UV–Vis diffuse reflectance spectroscopy showed a direct bandgap of 3.02 eV and additional visible-light absorption, which may be associated with defect states and possible extrinsic contributions. Photoluminescence spectroscopy exhibited green emission attributed to intrinsic defects. The photocatalytic performance of the synthesized ZnO was evaluated through the removal of Rhodamine B under irradiation, achieving a maximum removal efficiency of 97.68% within 150 min. Kinetic analysis indicated that the process follows a pseudo-first-order model with an apparent rate constant of 0.0290 min⁻¹. The observed photocatalytic performance may be associated with the structural and optical characteristics of the synthesized ZnO. However, the specific roles of these factors, as well as the contribution of adsorption, cannot be conclusively distinguished in the absence of a control sample. Overall, this study provides insight into the relationship between synthesis conditions and the resulting properties of green-synthesized ZnO, while highlighting the need for further investigation to clarify the underlying mechanisms. This work demonstrates that shallot peel extract is an effective and environmentally benign capping agent for engineering ZnO photocatalysts with high efficiency for wastewater treatment applications.
Co-Authors Baso, Budiman Christanti, Cindy Claudia Cindy Claudia Christanti Damar Rastri Adhika Dimas Agustian Dira Asri Pramita Edi, Eduardus Erna Febriyanti Faustinus Kadha Florian Mayesti P.R. Makin Fry Voni Steky Fry Voni Steky Gebhardus D. Gelyaman Gelyaman, Gebhardus Djugian Hanas, Dicky Hanas, Dicky Frengky I Gede Arya Wiguna Kamaluddin Kamaluddin Kamaluddin Lisnahan, Charles V. Lukas Pardosi Mada, Grandianus Seda Makin, Florian M. P. R. Marselina TD. Tea Matius Stefanus Batu Megawati Megawati Mere, Janrigo Klaumegio Muhamad Jalil Baari Muhammad Reza Nugraha, Ashari Budi Rino Rakhmata Mukti Risald Risna Erni Yati Adu Risna EY. Adu Sefrinus Maria Dolfi Kolo Siahaan, Desta Gloria Talan, Veronika Sofia Jaquelin Tea, Marselina Theresia Djue Tnunay, Ite Morina Yostianti Veinardi Suendo Veinardi Suendo Viny Veronika Tanuwijaya Viny Veronika Tanuwijaya Welsiliana