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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Sains Materi Indonesia Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir Alchemy : Journal of Chemistry IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) INDONESIAN JOURNAL OF APPLIED PHYSICS ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Bulletin of Chemical Reaction Engineering & Catalysis Borneo Journal of Pharmacy Journal Serambi Engineering (JSE)
Sri Mulijani
Department Of Chemistry, FMIPA, IPB University Jalan Tanjung Kampus IPB, Dramaga, Babakan, Dramaga, Bogor, Jawa Barat, 16680, Indonesia
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics

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Journal : Bulletin of Chemical Reaction Engineering

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TiO2/ZnO/CuO/HDTMA-Br Composite for Photodegradation of Oxidative Compounds of Used Cooking Oil (UCO): Photodegradation of Free Fatty Acids and Peroxides Pitaloka, Adinda; Sutriah, Komar; Mulijani, Sri; Khotib, Mohammad
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20554

Abstract

Used cooking oil (UCO) contains peroxide and FFA, which can impede UCO processing and lower the quality of downstream products. The majority of pretreatment techniques currently in use have drawbacks, such as excessive chemical use. An alternative that is more successful and efficient is photocatalysis. No research has been conducted on the photodegradation of UCO using TiO2/ZnO/CuO/HDTMA-Br composites. Precipitation was used to create the composite. The TiO2/ZnO/CuO composite has a high crystallinity, specifically 74.54% in the 1 CMC-modified catalyst, according to the characterization results. The spectrum of the synthesized TiO2/ZnO/CuO composite showed the presence of H2O and CO2 groups in addition to the primary groups of TiO2, ZnO, and CuO. Additionally, the 1 CMC modification increased pore volume and surface area. The surfactant-modified composite exhibited a more consistent morphology, as observed by SEM analysis. The best results from photocatalytic testing at different temperatures, times, and surfactant concentrations were obtained at 120 °C for an hour with a surfactant concentration of 1 CMC. These results show that degradation using TiO2/ZnO/CuO photocatalysts can lower the FFA and peroxide contents of UCO by 65% and 59%, respectively, under ideal conditions. This study focuses on FFA and peroxide value parameters as a preliminary investigation into alternative UCO pretreatment solutions. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
The Incorporation of Hemin Catalysts and Alumina Nanoparticles in a Medium of Spondias mombin Leaf Extract of A Sulfonated Polysulfone-Polyaniline_Alumina Membrane Electrode Assembly for Fuel Cell Technologies Wulanawati, Armi; Yulizar, Yoki; Mulijani, Sri; Rohman, Fadli
Bulletin of Chemical Reaction Engineering & Catalysis 2026: Just Accepted Manuscript and Article In Press 2026
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20630

Abstract

The development of sustainable Membrane Electrode Assembly (MEA) is crucial for advancing fuel cell technology. This study presents a novel MEA design that incorporates metal oxide nanoparticles synthesized using natural materials into a high performance membrane and employs a non-platinum catalyst. Specifically, alumina (Al2O3) nanoparticles were synthesized in medium Spondias mombin leaf extract, which served as both a base source and a capping agent. Alumina nanoparticles combined with polyaniline serve as a composite material to enhance the hydrophilicity, structural and thermal stability, power density, and proton conductivity of a sulfonated polysulfone-based composite membrane. Alumina is known as a catalyst support with a large surface area, while polyaniline is a conductive polymer that readily interacts with metal oxides and hemin, which is rich in electrons, exhibits catalytic activity. Based on the characterization of physical and chemical properties, the SPSU-PANI_Al2O3 7.5% composite MEA using a hemin catalyst on the cathode in a fuel cell (DMFC) demonstrated good structural and thermal stability, low methanol permeabilitity (3,37 x 10-6 cm2/detik), and high power density (90.76 mW/cm2), but low proton conductivity. Furthermore, Electrochemical cell testing of the hemin catalyst, which identified two reduction peaks at 0.48-0.52 V and 1.22 V similar to those of the Pt catalyst at the cathode demonstrates that the hemin catalyst provides comparable cell potential and catalytic activity for the oxygen reduction reaction for fuel cell technologies.
Co-Authors . TRIVADILA Adiarso Aferta, Lusi Alif, Alfiah Armi Wulanawati Benu, Marlon Jusak Rinaldy Djoko Kisworo Dyah Iswantini Erizal Erizal Fadli Rohman, Fadli Febryanti, Amalyah Gustini Syahbirin Harry Noviardi Ida Ayu Putu Sri Widnyani Karnadi Komar Sutriah Maman K Ajiriyanto Mega Fatimah Rosana Meri Suhartini Mohammad Khotib Muammar Yulian Neneng Siti Aminah Pitaloka, Adinda Qory Hajrul Fajriani Repita Sari Ridwan Ridwan Rohmatulloh Nabhani Setyanto Tri Wahyudi Shabrina Shabrina Silvia Devi Eka Putri Siswara, I.M Tatik Khusniati Yoki Yulizar