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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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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).
Membrane Electrode Assembly Based on Sulfonated Polysulfone-Activated Zeolite Composite Membrane for Fuel Cell Applications Wulanawati, Armi; Mulijani, Sri; Yulizar, Yoki
Jurnal Kimia Sains dan Aplikasi Vol 29, No 1 (2026): Volume 29 Issue 1 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.1.39-45

Abstract

The depletion of fuel cell reserves shows the need for alternative energy sources. In this context, fuel cells provide a promising solution, generating power without emissions. The membrane electrode assembly (MEA) in fuel cells is a critical component to maximize combustion efficiency. Therefore, this study aims to develop MEA using a composite membrane based on sulfonated polysulfone-activated zeolite (PSfs-Z). The membrane was obtained by first sulfonating polysulfone (PSf) and then adding activated zeolite. Optimum fuel performance was achieved with the activated zeolite using 3 N HCl. Sulfonation was completed, as demonstrated by a sulfonation degree of 32.63%. The absorption bands of the SO2 group vibration from SO3H of PSfs were identified at a wave number of 1111.00 and 1259.33 cm−1. The successful formation of MEA was confirmed by its morphology, as observed using a scanning electron microscope, with the formation of a catalyst layer and a membrane in the cross-section. The highest proton conductivity and cell potential obtained for PSfs-Z 3 N MEA were 0.01727 S.cm−1 and 330 mV, respectively. This means the membrane electrode assembly based on a sulfonated polysulfone-activated zeolite composite membrane has a higher potential than the
Co-Authors . TRIVADILA Adiarso Aferta, Lusi Alif, Alfiah Armi Wulanawati Benu, Marlon Jusak Rinaldy Djoko Kisworo Dyah Iswantini Erizal Erizal Febryanti, Amalyah Gustini Syahbirin Harry Noviardi Ida Ayu Putu Sri Widnyani Karnadi Komar Sutriah Maman K Ajiriyanto 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 Sudirman Sudirman Tatik Khusniati Yoki Yulizar