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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
Awitdrus Awitdrus, Awitdrus
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Agriculture, Biological Sciences & Forestry Astronomy 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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Journal : science technology and communication journal

 1 
Performances of dye-sensitized solar cell (DSSC) with working electrode of aluminum-doped ZnO nanorods Truly Theresia Saputrina; Iwantono Iwantono; Awitdrus Awitdrus; Akrajas Ali Umar
Science, Technology, and Communication Journal Vol. 1 No. 1 (2020): SINTECHCOM Journal (October 2020)
Publisher : Lembaga Studi Pendidikan dan 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; Dewi Indriyani Roslim; Awitdrus Awitdrus
Science, Technology, and Communication Journal Vol. 3 No. 3 (2023): SINTECHCOM Journal (June 2023)
Publisher : Lembaga Studi Pendidikan dan 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 Rakhmawati Farma; Meisya Meisya; Irma Apriyani; Awitdrus Awitdrus; Erman Taer
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 Anshori Kasri; Saktioto Saktioto; Rakhmawati Farma; Ari Sulistyo Rini; 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.
Co-Authors Ade Nur Indah Lestari Agustino Agustino Agustino Agustino Akrajas Ali Umar Alamin, Rahmatan Lil Amalia Aisha Noer Amiruddin, Erwin Angela Carolina Simanjuntak Anshori Kasri Aria Yunita Aria Yunita Ayang Febrita Daulay, Siti Rahma Decha Apriliany Suwandi Decha Apriliany Suwandi Defrianto Defrianto Desmagrini Desmagrini Desy Veyka Rukmana Dewi Indriyani Roslim Dewi Indriyani Roslim Dewi Mulfida Erin Mazelly Hutapea Erman Taer Erwin Erwin Fera Anggelina Fitri Wahyuni Gultom, Elika Irma Apriyani Irma Apriyani Irma Apriyani Iwantono Iwan Barnawi Iwantono Iwantono Jaliaz, Akmal Karina Silviani Lailatul Rahmi Lazuardi Umar Liva Delvi Martha Theresia Simanjuntak Meisya Meisya Melinda Vivi Meylia Susiana Dewi Putri Miftah Ainul Mardiah Mohamad Deraman, Mohamad Mulfida, Dewi Nasution, Dio Davana Firdaus Nurlisa Kartikasari Purba, Rosianna Rakhmawati Farma Raysa Fadillah Ricko Mahindra Ridho Nopriansyah Rinaldo Abdi Rini, Ari Sulistyo Rita Kartini Manullang Saidatun Khofifah Saktioto Saktioto Saktioto Saktioto Sella Natalia Sinuraya, Salomo Siti Komariah Sri Ulina Karo Sekali Sugiyanto Sugiyanto Suhardi Suhardi Suhardi Suhardi Sumarti Sumarti Syahputri, Intan Tengku Emrinaldi Truly Theresia Saputrina Usman Malik Vepy Asyana Vina Azhara Widarti ' Winda Nofriyanti Windayani Windayani Yanuar Hamzah Yurike Asra Zulfa Zulfa Zulkifli Zulkifli Zurya Hanifa Zurya Hanifa