Article Per Year (5 Year)
p-Index From 2021 - 2026
4.022
P-Index
This Author published in this journals
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
Unknown Affiliation
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

Published : 51 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 51 Documents
Search

 2   3   4   5   6 
Pengaktifan Kimia Berbantuan Gelombang Mikro Karbon Aktif dari Kulit Kacang dengan Waktu Pra-karbonisasi yang Berbeda Awitdrus Awitdrus; Dewi Mulfida; Rakhmawati Farma; Saktioto Saktioto; Iwantono Iwantono
Jurnal Fisika Vol 8, No 2 (2018)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v8i2.16974

Abstract

Karbon aktif berbahan dasar kulit kacang (Arachis hypogaea L) disintesis menggunakan metode pengaktifan kimia berbantuan gelombang mikro. Kulit kacang dipra-karbonisasi selama 2 jam, 3 jam dan 4 jam pada temperatur 200 oC. Pengaktifan kimia dilakukan menggunakan kalium hidroksida dengan rasio massa pra-karbonisasi dan kalium hidroksida adalah 2:1 selama 24 jam. Iradiasi gelombang mikro dilakukan pada daya keluaran 630 watt selama 20 menit. Sifat fisika karbon aktif dikarakterisasi menggunakan difraksi sinar-X untuk mengetahui struktur mikro, isoterma adsorpsi/desorpsi N2 untuk mengetahui parameter porositas, serta infra merah transformasi Fourier untuk mengetahui struktur rantai karbon aktif. Pola difraksi sinar-X menunjukkan bahwa semua karbon aktif memiliki struktur turbostratik yang ditandai dengan adanya puncak (002) dan (100). Luas permukaan dan volume pori karbon aktif tertinggi adalah 153 m2/g dan 0,064 cm3/g untuk karbon aktif dengan waktu pra-karbonisasi selama 2 jam. Struktur rantai karbon menunjukkan adanya  gugus fungsi P=O, C-O, C-C, C-H pada bilangan gelombang 1031 cm-1, 1609,67 cm-1, 2363,87 cm-1, dan 2867,31 cm-1.
Structural Properties of the Quaternary Alloy CuIn(SxSe1-x)2 Awitdrus Awitdrus; Yanuar Yanuar
Indonesian Journal of Physics Vol 13 No 3 (2002): Vol. 13 No.3, Juli 2002
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (74.997 KB)

Abstract

In this paper we report the structural characterization of the quaternary alloy CuIn(SxSe1-x)2 grown by the horizontal Bridgman method. It is found that the CuIn(SxSe1-x)2 crystals have a chalcopyrite structure. With increasing x, lattice constants decrease following Vegard’s law.
SINTESIS FISIKOKIMIA DARI KARBON AKTIF BERBASIS BIOMASSA SABUT NIPAH (Nypa fruticans) UNTUK PERFORMANSI KINERJA SUPERKAPASITOR Irma Apriyani; Rakhmawati Farma; Awitdrus Awitdrus; Aria Yunita
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.127-134

Abstract

Biomass-based activated carbon materials provide a new approach for the development of high-performance electrode materials for supercapacitor cells. In addition, the carbon materials are low cost and sustainable for large-scale production of electrode materials. In this study, carbon electrodes made from nipa palm (Nypa fruticans) coir were synthesized physicochemically. The pore size distribution of the carbon electrodes can be adjusted with the increased CO2 activation temperature (700°C, 800°C, and 900°C). The results showed that the SN-800 carbon electrode had the lowest density shrinkage and showed excellent electrochemical performance. The highest specific capacitance was obtained at 247 F/g at a current density of 1 A/g in a symmetrical two-electrode system. This work provides an efficient strategy for the preparation of high performance carbon electrodes based on nipa coir biomass.
SINTESIS KARBON AKTIF BERBASIS BIOMASSA SERAT BINTARO SEBAGAI BAHAN ELEKTRODA UNTUK APLIKASI SEL SUPERKAPASITOR Aria Yunita; Rakhmawati Farma; Awitdrus Awitdrus; Irma Apriyani
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.223-230

Abstract

Biomass-based activated carbon has been widely developed due to its environmental friendliness, abundant availability, porous structure, high specific surface area and good electrical conductivity. One of the ways to improve the performance of supercapacitor cells is to increase the carbonization temperature, so that in this study various carbonization temperatures were carried out at 500°C, 600°C and 700°C. The results showed that the carbonization temperature of 600°C was the optimum temperature for making SB-based activated carbon. This is indicated by the results of measuring the physical properties of SB-600 in the form of the lowest density shrinkage value which can increase porosity thereby increasing the performance of supercapacitor cells. From this study, the highest capacitance value of 213 F.g-1 was found on the SB-600. The results obtained indicate that the selection of the optimum carbonization temperature is important and can improve the performance of supercapacitor cells.
PEMANFAATAN LIMBAH SERABUT KELAPA MUDA SEBAGAI ELEKTRODA KARBON SUPERKAPASITOR DENGAN VARIASI KONSENTRASI AKTIVATOR ZnCl2 Ridho Nopriansyah; Awitdrus Awitdrus
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.301-305

Abstract

The chemical activation method is a simple and low-cost activation method that can modify the surface morphology associated with improving the electrochemical properties of supercapacitor cell electrodes. The porous carbon framework was derived from young coconut fiber biomass by optimizing the chemical activation reagent (ZnCl2). Carbon material derived from coconut fiber is a biomass for the application of supercapacitor cell electrodes through the pre-carbonization stage at 200°C for 1 hour 30 minutes, chemical activation using the activating agent ZnCl2 with various concentrations of 0.1, 0.3, and 0.5 M, the carbonization process uses gas N2 with a temperature of 600°C and physical activation using CO2 gas with a temperature of 750°C. The optimum concentration of young coconut fiber-based carbon electrodes is found at a concentration of 0.5 M, which has the highest density shrinkage percentage of 53.11%. X-ray diffraction analysis showed that the sample at a concentration of 0.5 M was amorphous with two wider diffraction angle of 2q at an angle of 24.867° and 44.556°, with the lowest Lc/La ratio of 0.3 and an average microcrystalline layer of 2.3. Analysis of electrochemical properties showed that samples at a concentration of 0.5 M has an optimum specific capacitance of 81.84 F/g in the CV.
Utilization of young coconut fiber activated carbon with pre-carbonization variations as a supercapacitor electrode Winda Nofriyanti; Awitdrus Awitdrus
Indonesian Physics Communication Vol 21, No 2 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.2.127-130

Abstract

A supercapacitor is an electrochemical device that integrates power supply and charge storage capabilities.  The primary constituents of a supercapacitor consist of electrodes, separator, electrolyte, and current collector. This work focuses on the production of carbon electrodes using coconut fibre biomass waste. The carbonisation process is carried out at three different temperatures: 200ºC, 225ºC, and 250ºC. The resulting samples are labelled as SC-200, SC-225, and SC-250, respectively. The production of Carbon electrodes involves multiple procedures, including pre-carbonization, chemical activation using a ZnCl2 activator at a concentration of 0.5 M, followed by carbonisation using N2 gas at a temperature of 600ºC, and physical activation using CO2 gas at a temperature of 750ºC. The mass reduces by 23.01%, 27%, and 36.51% following pre-carbonization. The sample with the greatest density value is SC-225, which has a mass loss percentage of 41.66%. The results of cyclic voltammetry indicate that the SC-225 supercapacitor cell has the maximum capacitance value of 199.82 F/g. To summarise, the SC-225 temperature can function as an activated carbon electrode that enhances the performance of the supercapacitor electrode.
Fabrication of carbon electrodes from young coconut fiber by varying the carnonization temperature as a supercapacitor application Sri Ulina Karo Sekali; Awitdrus Awitdrus
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.63-66

Abstract

Supercapacitors are electrochemical energy storage devices that can provide a higher energy density than conventional dielectric capacitors. The most important component of a supercapacitor cell is the electrodes. In this study, the supercapacitor cell electrodes used are based on young coconut fiber with carbonization temperature variations of 500°C, 600°C, and 700°C. The pre-carbonization process is operated using a temperature of 200°C for 90 minutes, chemical activation using an activating agent ZnCl2 0.5 M, carbonization using N2 gas at various temperatures, and physical activation using CO2 gas at 800°C. The highest density value is the CNL-600 sample with a density loss percentage value of 50.96%. Analysis of electrochemical properties showed that samples with a carbonization temperature of 600°C had the highest specific capacitance values, namely 190.3 F/g using method of the cyclic voltammetry. This shows that the best sample is the sample with a carbonization temperature of 600°C.
Preparation of Terminalia catappa Shell Based Activated Carbon by Microwave Assisted Chemical Activation awitdrus, awitdrus
Journal of Technomaterial Physics Vol. 1 No. 1 (2019): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v1i1.820

Abstract

Activated carbon was prepared from Terminalia catappa shells using microwave asissted KOH activation. The ratio of mass percentages of Terminalia catappa and KOH were 4:1, 4:2, and 4:3. Terminalia catappa based activated carbon was prepared by KOH activation at the room temperature for 24 hours and followed by microwave irradiation at the out put power of 630 Watt for 20 minutes. The physical properties of activated carbon i.e. surface morphology, micro structure, and BET surface area were characterized by electron scanning microscope, X-ray diffraction and N2 adsorption-desorption isotherm at 77K, respectively. The highest BET surface area was 312 m2/g with adsorption of activated carbon towards methylene blue by 84.4 mg/g. The BET surface area was directly correlated with the stack height (Lc) of the activated carbon.
Synthesis and characterization of activated carbon based on young coconut fiber as a supercapacitor electrode Nasution, Dio Davana Firdaus; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.261-264

Abstract

Supercapacitor is energy storage devices consisting of electrodes, electrolyte, current collectors, and separator. In this research, carbon electrodes are made from young coconut fiber biomass (SKM) waste using ZnCl2 0.5 M as activation agent and variations in  physical activation temperatures. Carbon electrodes preparation begins with a pre-carbonized process of 200ºC temperatures for 1 hour and 30 minutes,  chemical activation using ZnCl2 0.5 M as activation agent, then the carbonization process uses N2 gas as well as physics activation using CO2 in temperature variation of 700ºC, 750ºC, and 800ºC. Analysis of the nature of electrodes cell capacitor based fiber young coconut fibers sample shows that the activation physics 750ºC sample is best, agreeble with the density of carbon electrodes declined by 40.43% after the carbonization-activation process. Carbon electrodes represent semicrystalline based on the characterization of the X-ray diffraction, marked with a ramp peak at 2θ at about 24º and 45º. The SKM-750 has a highest of Lc/La ratio an average number of microcrystalline inner layers (Np), are 0.9 and 3.55. SKM-750 has the highest of specific capacitance value, namely 245.45 F/g.
N-doped porous activated carbon from rubber seed shells (Hevea brasiliensis) as high-energy supercapacitor material Daulay, Siti Rahma; Farma, Rakhmawati; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.211-218

Abstract

Biomass is an environmentally safe and cost-effective source of activated carbon (AC) for supercapacitors (SC). In this study, AC was generated using precarbonisation and activation with KOH using rubber seed shell (RSS) as a precursor. The electrochemical performance was investigated by cyclic voltammetry and galvanostatic charge-discharge determination and the ACs were characterised using FTIR analysis technique. RSS materials were prepared by varying calcination temperatures of 700°C, 800°C, and 900°C without doping. RSS800 shows a maximum specific capacitance of 190 F/g and has an energy density of 26.2 Wh/kg and a power density of 695.4 kW/kg at 1 A/g. Furthermore, melamine was used as an external dopant source for the N-doping process. The doped AC sample (RSS800-90) had a specific capacitance of 288 F/g and has an energy density of 40.9 Wh/kg and a power density of 515.4 kW/kg at 1 A/g in H2SO4 electrolyte. N-doped with melamine as nitrogen source was successfully incorporated into AC to produce high-performance electrodes for SC.
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