Oman Zuas, Nuryatini Hamim, Nurhani Aryana, Wuwus Ardiatna, Elvina Trivida, Suherlan Dayat Sudayat, Andi Suhandi, Toto Sudiro, Fakhzah Aliifatudz Dzakirah
This study presents a novel and sustainable precipitation method for synthesis of Fe3O4/ZnO composite powder directly from corrugated galvanised iron (CGI) waste, addressing gaps in waste-derived catalysts for advanced oxidation processes. XRD characterisation revealed that the Fe3O4/ZnO powder contains the dominant Fe3O4 (magnetite) crystalline phase with minor amount of ZnO phase. FTIR spectroscopy verified Fe–O (571 cm−1) and Zn–O (450–500 cm−1) bonds, while XPS confirmed coexistence of Fe2+/Fe3+ (710/724 eV) and Zn2+ (1022/1045eV) cations essential for redox cycling. The composite powder showed irregular, agglomerated morphology (SEM/TEM, 20–150 nm particles), mesoporosity (BET 22.69 m2/g, Type IV isotherm) and superparamagnetic properties (Ms ≈ 51 emu/g). Preliminary Fenton-like tests achieved 85.47% methylene blue (MB) degradation in 60 min (first-order reaction, k = 0.024 min−1) via •OH generation, with >93% efficiency over 4 reuse cycles and facile magnetic separation. This reinforces waste valorisation for sustainable wastewater treatment, demonstrating a synergistic effect at the Fe3O4/ZnO interface for scalable environmental remediation. © (2026), (University of Novi Sad, Faculty of Technology). All rights reserved.
Research Centre for Catalysis, National Research and Innovation Agency, Republic of Indonesia, Building 456, K.S.T-BJ., Habibie, Indonesia; Research Centre for Molecular Chemistry, National Research and Innovation Agency, Republic of Indonesia, Building 452, K.S.T-BJ., Habibie, Indonesia; Research Centre for Equipment Manufacturing Technology, National Research and Innovation Agency, Republic of Indonesia, Building 720, K.S.T-BJ., Habibie, Indonesia; Research Centre for Electrical Technology, National Research and Innovation Agency, Republic of Indonesia, K.S.T-BJ., Habibie, Indonesia; Research Centre for Energy Materials, National Research and Innovation Agency, Republic of Indonesia, Building 440–442, K.S.T-BJ., Habibie, Indonesia; Chemistry Department, Faculty of Natural Science, Universitas Negeri Malang, Semarang Street No. 5, East Java, 65145, Indonesia
