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All Journal Jurnal Keteknikan Pertanian Komunikasi Fisika Indonesia JURNAL FISIKA Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam SEMIRATA 2015 Journal of Aceh Physics Society Jurnal Litbang Industri Jurnal Fisika Indonesia Journal of Technomaterial Physics Jurnal Litbang Industri Indonesian Journal of Physics (IJP) Science, Technology, and Communication Journal Journal of Engineering and Technological Sciences
Awitdrus Awitdrus, Awitdrus
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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Performances of dye-sensitized solar cell (DSSC) with working electrode of aluminum-doped ZnO nanorods Saputrina, Truly Theresia; Iwantono, Iwantono; Awitdrus, Awitdrus; Umar, Akrajas Ali
Science, Technology and Communication Journal Vol. 1 No. 1 (2020): SINTECHCOM Journal (October 2020)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v1i1.22

Abstract

Renewable energy sources are intensively developed for substituting fossil energy by several routes, such as solar cells and wind power. As a kind of solar cell, dye-sensitized solar cell (DSSC) was studied for low cost and environmentally friendly cell in competing with a silicon-based cell which dominated in the market. But, main problem in DSSC is low current density and power conversion efficiency, especially zinc oxide (ZnO)-based DSSC. In this paper, we enhance the ZnO nanorod properties through the doping of aluminum (Al). For obtaining optimum results, we varied the dopant concentration of 1%, 1.5%, 1%, and 3%. The Al-doped ZnO nanorod was grown by a seed-mediated hydrothermal method at 90oC for 8 hours. The physical properties were analyzed by field emission scanning electron microscopy and EDX, while the photovoltaic properties were analyzed by J-V curve analysis. An improvement of photovoltaic performance up to 200% is obtained by the ZnO nanorod with 1% Al-doped concentration.
Effect of chemical ions on oil palm midribs and leaves by direct electric voltage treatment Defrianto, Defrianto; Suhardi, Suhardi; Roslim, Dewi Indriyani; Awitdrus, Awitdrus
Science, Technology and Communication Journal Vol. 3 No. 3 (2023): SINTECHCOM Journal (June 2023)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v3i3.233

Abstract

The productivity of palm trees grown is generally measured in monthly and yearly periods, but on a shorter time scale, it is particularly measured by the plant maintenance of palm trees. Consideration of the general productivity in time is how to produce good fruit fertilizer (chemical aspect), healthy plants, fast growing and evolving (agricultural aspect), and genetic type of palm that grows (biological aspect). However, the growth and production on the physical aspect is still less attention. Through physical treatment, the growth of palm trees can be optimized to support aspects of the previous aspects, as it has been proven in advanced countries on the plant's aloe vera, avocado, and pine trees. In this paper, the methodology proposes a direct current voltage treatment to the palm tree that can accelerate the flow of ions to grow and develop nutrients. The palm tree samples are aged 1 to 5 years corresponding to the provision of 10, 16, 25, 35, and 50 V for each of the ages of the palm tree respectively. Identifying samples before and after treatment by electricity is based on the geometry of leaves, midribs, and ions effect. There have been reduced and increased levels of nutrients. This identification can optimize the productivity of palm trees.
Design and fabrication of chitin-derived electrodes with optimization of temperature carbonization for energy storage in supercapacitors Farma, Rakhmawati; Meisya, Meisya; Apriyani, Irma; Awitdrus, Awitdrus; Taer, Erman
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.310

Abstract

Supercapacitors have become one of the potential solutions for efficient energy storage, and the development of carbon-based electrodes from biomass has received increasing attention due to their sustainability. This study aims to produce carbon electrodes from crab shells (CS) as biomass materials by optimizing the carbonization process with temperature variations of 600°C, 700°C, and 800°C for supercapacitor cell applications. Material characterization shows that the carbonization temperature of 700°C produces carbon electrodes with optimal semicrystalline structures and mesopore dominance, which supports efficient ion diffusion. The CS-700 carbon electrode showed the highest specific capacitance of 118.84 F/g in cyclic voltammetry tests with 1 M H2SO4 electrolyte. These results indicate that carbonization at 700°C provides the best electrochemical performance, making it the optimal condition for developing efficient and environmentally friendly mud crab shell biomass-based electrodes for supercapacitor cell applications.
Argon plasma ionization in thermodynamic equilibrium with continuity equation Kasri, Anshori; Saktioto, Saktioto; Farma, Rakhmawati; Rini, Ari Sulistyo; Erwin, Erwin; Awitdrus, Awitdrus
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.318

Abstract

Local thermodynamic equilibrium is a foundational concept in plasma physics and heat transfer, describing a state where each small region of a system can be treated as if it is in thermodynamic equilibrium, even if the whole system is not. However, achieving accurately perfect thermodynamic equilibrium conditions in real-experiments is often challenging. It often struggles for understanding phenomena like excited states or specific Arrhenius-driven reactions. As a result, the advantages of plasma modeling with simplifications can sometimes overshadow the disadvantages of experiments. This study simulated the ionization process of argon plasma using the 4th order Runge-Kutta numerical method. The simulation, initiated with initial densities before the simulation is run, each of them is electrons 2.6 × 1018 m-3, neutral argon (Ar) 2.6 × 1018 m-3, positive argon ions (Ar+) 2.6 × 1018 m-3, and positive diatomic argon ions (Ar2+) 2.6 × 1018 m-3, successfully obtained reaction rate equilibrium data at the 625th iteration. The final densities observed were 2.46 × 1018 m-3 for electrons, 2.27 × 1018 m-3 for neutral argon, 6.4 × 1015 m-3 for Ar+, and 4.34 × 1017 m-3 for Ar2+. These results show the equilibrium reaction rate in argon plasma which provides information that density of electron and Ar+ species show a decreasing trend while density of Ar and Ar2+ species shows an increasing trend which are the result of ionization and recombination processes in the entire plasma system.
Preliminary study on the utilization of cabbage waste as a raw material for activated carbon in supercapacitor applications Syahputri, Intan; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.97-104

Abstract

This study aims to utilize cabbage waste as an active carbon material for supercapacitor electrodes through an environmentally friendly approach without chemical activation. The fabrication process includes pre-carbonization at 200°C for 1 hour, carbonization at 600°C, and physical activation at 850°C. The resulting carbon material exhibits a porous structure essential for ion storage, despite the absence of chemical activation. Electrochemical testing using the galvanostatic charge-discharge method with Na2SO4 electrolyte concentrations of 0.5 M, 1 M, and 1.5 M demonstrated a highest specific capacitance of 155.87 F/g at 1.5 M concentration. The increase in electrolyte concentration enhances ion mobility and charge storage capacity. This research indicates that cabbage waste can serve as an effective active carbon source for supercapacitors, with further performance improvements expected through chemical activation in future studies.
Preliminary study on the potential use of Averrhoa bilimbi L. as a supercapacitor electrode material Rahmi, Lailatul; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.125-132

Abstract

The global energy crisis and environmental damage caused by the use of fossil fuels have driven the development of environmentally friendly energy storage technologies, one of which is the supercapacitor. This study aims to explore the potential of Averrhoa bilimbi L. (belimbing wuluh) as a source of activated carbon for supercapacitor applications. Activated carbon from belimbing wuluh pulp was synthesized through a carbonization process at 800°C. Morphological characterization using SEM showed a porous surface that had not yet developed optimally, while EDX analysis identified carbon, oxygen, and magnesium as the dominant elements. Electrochemical characterization was carried out using CV and GCD methods with variations in H2SO4 electrolyte concentration (1, 2, and 3 M). The electrode tested with 1 M showed the best performance, with a specific capacitance of 45.98 F/g (CV) and 96.81 F/g (GCD). These results indicate that belimbing wuluh has potential as a sustainable natural material for the development of environmentally friendly supercapacitors.
Comparison of electrochemical performance of supercapacitor electrodes based on electrolyte solution variation Purba, Rosianna; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.133-140

Abstract

The increasing global energy demand has accelerated the progress of renewable energy technologies and the creation of effective energy storage solutions such as supercapacitors. In this study, biomass obtained from the peel of the matoa fruit (Pometia pinnata) was employed as a raw material to produce activated carbon for supercapacitor electrodes. The preparation process consisted of an initial carbonization step, followed by chemical activation using a 0.7 M potassium hydroxide (KOH) solution, and then additional carbonization and physical activation stages. The synthesized material was characterized through density measurements and electrochemical testing, including cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) methods, conducted with KOH electrolytes at concentrations of 2, 4, and 6 M. Results demonstrated that combining chemical activation with pyrolysis yielded better outcomes than physical activation alone, as shown by a decrease in activated carbon density, indicating enhanced porosity and surface area. CV analysis revealed that increasing the KOH electrolyte concentration improved the supercapacitor’s performance, reflected in higher specific capacitance during charge-discharge cycles. Moreover, GCD experiments showed that electrodes treated with 6 M KOH electrolyte achieved the greatest specific capacitance, energy density, and power density, recorded at 170.52 F/g, 23.68 Wh/kg, and 580.00 W/kg, respectively. These findings highlight that activated carbon derived from matoa fruit peel is a highly promising material for supercapacitor electrodes, combining excellent electrochemical characteristics, efficiency, and stable cycling behavior.
Preparation of activated carbon electrodes from orange peel biomass with various separator materials for supercapacitor applications Alamin, Rahmatan Lil; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.119-124

Abstract

Activated carbon electrodes from orange peel biomass materials for supercapacitor applications with variety of type separator have been prepared. Activated carbon was prepared by pyrolysis process at 800° under N2 gas envinroment. Electrochemical characterization was tested on avariety of separators, i.e, JR-800-W (using Whatman paper number 40), JR-800-E (using eggshell membrane, and JR-800-O (using orange fruit membrane). The results of chemical measurement for the cyclic voltammetry method on the three samples are capacitance values of 191.82 F/g on JR-800-W, 115.08 F/g on JR-800-E, and 94.17 F/g on JR-800-O. The capacitance value in the galvanostatic charge-discharge method are 174.24 F/g with IR drop of 0.067 for sample JR-800-W, 133.22 F/g with IR drop of 0.14 for sample JR-800-E, and 116.8 F/g with IR drop of 0.36 for sample JR-800-O. Whatman paper separators produce good electrochemical properties, indicating the use of separators can affect the performance of activated carbon electrodes for supercapacitor applications.
Making supercapacitor carbon electrodes from lemongrass leaf biomass with variations in physical activation temperature Jaliaz, Akmal; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 1 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.1.49-52

Abstract

Supercapacitor is energy storage device consisting of current collector, electrodes, separator, and electrolyte. Material selection and fabrication of the electrodes play an important role in improving the performance of the supercapacitor. In this research, carbon electrodes of supercapacitors were made from citronella leaves using variations in physical activation temperature. The preparation of carbon electrodes were starts from the pre-carbonization at temperature of 200℃ for 2 hours, chemical activation using 0.3 M KOH as activating agent, carbonization process using N2 gas at temperature of 600℃ and physical activation using CO2 gas with temperature variations of 750℃, 800℃, and 850℃. The highest of percentage density reduction at temperature 800℃ is 51.42%. Analysis using X-ray diffraction showed that the sample has a semicrystalline structure with the highest of ratio Lc/La and average number of microcrystalline layer (Np) at temperature of 800℃, are 0.27 and 1.67 respectively. The highest of specific capacitance value is 122 F/g at temperature 800℃. The result show that the optimum physical activation temperature for carbon electrodes based on citronella leaves is 800℃.
Modification of magnetic properties and morphology of iron oxide particles of natural sand from Rokan River through copper doping and preparation using ball milling method Gultom, Elika; Sinuraya, Salomo; Amiruddin, Erwin; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 22, No 1 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.1.35-42

Abstract

The magnetic susceptibility, magnetic properties, morphological properties, and composition of iron oxide nanoparticles of the natural sand in Rokan River, Rokan Hulu Regency, doped copper and prepared by the ball milling method. Processing of the magnetic and non-magnetic particle separation was carried out using iron sand separator (ISS). The ball milling process is ground in two stages for 70 hours and 30 hours and is divided into 3 parts and doped copper with concentrations (weight%) 0 wt%, 5 wt%, and 10 wt%, called BM2A, BM2B, and BM2C products. The calculation of the magnetic susceptibility of the sample is carried out based on the values (BT) and (B0). The resulting magnetic susceptibility decreases as the percentage of copper doping increases. Vibrating sample magnetometer (VSM) shows the magnetic properties of iron oxide particles produced, namely magnetization saturation (MS) decreases, coercivity value (HC) and loop squareness (Mr/MS) grow up, and remanent magnetization (Mr) and loop area (A) varies as doping concentration increases. Morphological properties and composition of iron oxide particles using a scanning electron microscope with energy dispersive X-ray (SEM-EDX). The average measurement of particles produced decreased with the increase in copper doping given, that is 121.960 ± 47.493 nm, 119.730 ± 37.03 nm, and 84.244 ± 34.392 nm. Copper element increased with the increase in doping concentrations given which were 0.76%, 7.11%, and 8.13%, while elements O, Si, and Fe decreased.
Co-Authors Ade Nur Indah Lestari Agustino Agustino Agustino Agustino Akrajas Ali Umar Alamin, Rahmatan Lil Amalia Aisha Noer Amiruddin, Erwin Angela Carolina Simanjuntak Apriyani, Irma Aria Yunita Aria Yunita Azwat, Luqyana Adha Daulay, Siti Rahma Decha Apriliany Suwandi Decha Apriliany Suwandi Defrianto Defrianto Desmagrini Desmagrini Desy Veyka Rukmana Dewi Indriyani Roslim Dewi Mulfida Erin Mazelly Hutapea Erman Taer Erwin Erwin Fera Anggelina Fitri Wahyuni Gultom, Elika Irma Apriyani Irma Apriyani Iwantono Iwan Barnawi Jaliaz, Akmal Karina Silviani Kasri, Anshori Lailatul Rahmi Lazuardi Umar Martha Theresia Simanjuntak Meisya, Meisya Melinda Vivi Meylia Susiana Dewi Putri Miftah Ainul Mardiah Mohamad Deraman, Mohamad Muhammad Luthfi Mulfida, Dewi Nasution, Dio Davana Firdaus Nurlisa Kartikasari Purba, Rosianna Putri, Hardini Chania Rahmondia N. Setiadi Rakhmawati Farma Raysa Fadillah Ricko Mahindra Ridho Nopriansyah Rinaldo Abdi Rini, Ari Sulistyo Rini, Ari Sulistyo Rita Kartini Manullang Saidatun Khofifah Saktioto Saktioto Saputrina, Truly Theresia Sella Natalia Sinuraya, Salomo Solly Aryza Sri Ulina Karo Sekali Sugiyanto Sugiyanto Suhardi Suhardi Sumarti Sumarti Syahputri, Intan Usman Malik Vepy Asyana Widarti ' Winda Nofriyanti Windayani Windayani Yanuar Hamzah Yurike Asra Zulkifli Zulkifli Zurya Hanifa Zurya Hanifa