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All Journal Bulletin of Electrical Engineering and Informatics JURNAL ILMU PERTANIAN Science and Technology Indonesia Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat SCIENTIA JOURNAL Eksakta : Berkala Ilmiah Bidang MIPA Teknologi Indonesia Indonesian Physical Review Journal of Technomaterial Physics Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Mechanical Engineering for Society and Industry JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Makara Journal of Technology
Erna Frida
Department Of Physics, Faculty Of Mathematics And Natural Sciences – Universitas Sumatera Utara, Jl. Dr. T. Mansur No.9, Padang Bulan, Kec. Medan Baru, Kota Medan, Sumatera Utara
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UTILIZATION OF ACTIVATED CARBON FROM ELEPHANT GRASS (PENNISETUM PURPEREUM) AND MANGANESE DIOXIDE AS SUPERCAPACITOR ELECTRODES Fathi Marzuqi; Erna Frida; Syahrul Humaidi
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 4 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i4.3146

Abstract

The growing need for sustainable and eco-friendly energy storage solutions has led to advancements in high-performance supercapacitors with extended cycle life. This research explores the fabrication of composite electrodes using activated carbon derived from elephant grass (Pennisetum purpureum) combined with manganese dioxide (MnO₂). The carbon material was produced through chemical activation with potassium hydroxide (KOH) and subsequent physical activation using carbon dioxide (CO₂). MnO₂ was incorporated into the activated carbon at various weight ratios (10:0, 7:3, 5:5, 3:7, and 0:10). Morphological and elemental analyses were performed using SEM-EDS, Meanwhile, the electrochemical performance was evaluated using galvanostatic charge-discharge (GCD) tests and electrochemical impedance spectroscopy (EIS). Of all the samples evaluated, the composite containing a 3:7 ratio of carbon to MnO₂ exhibited the highest specific capacitance, reaching 198.51 F/g, highlighting the beneficial interaction between double-layer capacitance and pseudocapacitance. These findings suggest that elephant grass-derived carbon, when effectively combined with MnO₂, presents a cost-effective and environmentally friendly option for next-generation supercapacitor electrodes.
METHYL RED ADSORPTION BY BIODEGRADABLE POLYCAPROLACTONE/RICE HUSK ASH/TiO2 NANOFILLER HYBRID BIONANOCOMPOSITES: SYNTHESIS AND CHARACTERIZATION Armelia Yuniani; Erna Frida; Syahrul Humaidi
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 6 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i6.3470

Abstract

The contamination of wastewater by synthetic dyes such as Methyl Red poses serious environmental and health risks, necessitating effective remediation methods. This study investigates the synthesis and characterization of hybrid bionanocomposites composed of polycaprolactone (PCL), rice husk ash (RHA), and titanium dioxide (TiO2) nanoparticles for the efficient degradation of Methyl Red (MR) dye. The composites were prepared using a co-precipitation method for the incorporation of nano-RHA and TiO2. Characterization of the bionanocomposites was conducted through scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and photodegradation tests. XRD analysis, using the Scherrer equation, revealed crystallite sizes ranging from 19.01 nm (composite S0) to 27.25 nm (composite S2). FTIR spectra showed characteristic absorption peaks corresponding to Ti–O (669.29 cm⁻¹), Si–O (970.19 cm⁻¹), and C–H (2960.73 cm⁻¹) bonds. The photodegradation results indicated a significant improvement in dye adsorption, with the highest degradation efficiency observed in composite S1, achieving 93.55% degradation after 45 hours of UV irradiation. The degradation efficiencies of S0, S1, and S2 were found to be 87.1%, 93.55%, and 25.81%, respectively, under the same conditions. The incorporation of TiO2 and RHA in PCL significantly enhanced its photocatalytic activity. This study demonstrates the potential of these bionanocomposites as sustainable materials for textile wastewater treatment
THERMOPHYSICAL AND THERMAL CHARGING ENHANCEMENT OF PEG/Al₂O₃ COMPOSITES FOR THERMAL ENERGY STORAGE (TES) Amdy Fachredzy; Chyntia R. Situmorang; Erna Frida; Ariadne L. Juwono; Anggito P. Tetuko; Muhammad Fauzi; Muhammad A. H. Nabawi; Achmad Maulana S. Sebayang; Eko A. Setiadi
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.610

Abstract

The transition to renewable energy continues to face challenges in balancing supply and demand. Thermal Energy Storage (TES) based on Phase Change Materials (PCM) offers a potential solution, with polyethylene glycol (PEG) providing high storage capacity but low thermal conductivity. This study focuses on enhancing the performance of PEG 6000 by incorporating aluminum oxide (Al₂O₃, 8 and 12 wt.%) and sodium dodecyl benzene sulfonate (SDBS) as a surfactant. X-ray Diffraction (XRD) confirmed that no new phases were formed, while Differential Scanning Calorimetry (DSC) recorded an increase in latent heat up to 224.6 J/g for PEG/Al₂O₃ 12%. Thermal conductivity improved by more than 33.3%, and Thermogravimetric Analysis (TGA) verified enhanced thermal stability. Charging–discharging tests further demonstrated an extended average charging time with slight fluctuations during discharging. These findings highlight the promising potential of PEG/Al₂O₃ composites for TES applications in renewable energy systems.
Co-Authors Achmad Maulana S. Sebayang Alfonsius Chrisandy Pratama Siregar Aliakbar, Muhammad Amdy Fachredzy Anggito P. Tetuko Ariadne L. Juwono Armelia Yuniani Atikah, Nisrina Binti Mohd Zulkifli, Nurin Wahidah Bukit, Bunga fisikanta Bukit, Ferry Rahmat Astianta Bunga Fisikanta Bukit S.Si, M.Si Chyntia R. Situmorang Dadan Ramdan Darnianti Darnianti Dharma Sembiring Eko A. Setiadi Estananto Eva Marlina Ginting Eva Marlina Ginting Fathi Marzuqi Ferry Rahmat A. Bukit Ferry Rahmat A. Bukit Fiqri, Miftahul Ganda Parasian Damanik Ilmi Ilmi, Ilmi Imanuel P. Tua Panggabean Ivo Andika Hasugian Jamal Pandia Jufrizal Jufrizal Khairina Fitri Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Martha Marchofinece Padang Marzuki Sinambela Marzuki Sinambela Mega Sirait Muhammad A. H. Nabawi Muhammad Fauzi Nasution, Yulianti Noverita Sprinse Vinolina Noviyunida Noviyunida Nurdin Bukit Nurdin Bukit Nurdin Bukit Perdinand Sinuhaji Pintor Simamora Pratyka, Venna Sally Irvina Ritonga Santy Meilisa Manurung Siregar, Achmad Husein Siregar, Shinta Marito Suherman Suherman, Suherman Susilawati Susilawati Syahrul Humaidi Syahrul Humaidi Syahrul Humaidi, Syahrul Syiska Yana Tambunan, Nensy Nindy Tarigan, Kerista Theresia Grefyolin Simbolon Timbangen Sembiring Tresia Sinaga Vijai Aleksander Ginting Waslina Rangkuti Yahya Darmawan Yahya Darmawan Yahya Darmawan Yulianta Siregar