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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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Author-ID : 535830

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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KARAKTERISASI SIFAT ELEKTROKIMIA ELEKTRODA KARBON AKTIF BERBASIS LIMBAH SABUT KELAPA MUDA MENGGUNAKAN SEPARATOR MEMBRAN KULIT TELUR AYAM Angela Carolina Simanjuntak; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 19, No 1 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.1.31-34

The supercapacitor is an energy storage device with an electrochemical characteristic that can provide high energy and power density. The supercapacitor cell consists of a current collector, electrode, electrolyte, and separator. This study used young coconut fiber biomass as a supercapacitor electrode, H2SO4 as an electrolyte, 316L stainless steel as a current collector, and chicken eggshell membrane as a separator. The fabrication of electrode carbon made from young coco fiber begins with the pre-carbonization process, chemical activation using 0.5M KOH, carbonization process using N2 gas at a temperature of 600 °C, and physical activation using CO2 gas at a temperature of 750 °C. Analysis of electrochemical characteristics using cyclic voltammetry method resulting in a specific capacitance value of 197.05 F/g for a scan rate of 1 mV/s, 157.215 F/g for a scan rate of 2 mV/s, and 129.42 F/g for scan rate of 5 mV/s.

PENGARUH WAKTU PERENDAMAN DALAM PEMBUATAN KARBON AKTIF CANGKANG BUAH KETAPANG DENGAN PENGAKTIFAN KIMIA BERBANTUAN IRADIASI GELOMBANG MIKRO Awitdrus '; Desy Veyka Rukmana; Rakhmawati Farma; Iwantono '
Komunikasi Fisika Indonesia Vol 13, No 13 (2016)
Publisher : Universitas Riau

Karbon aktif dibuat dari cangkang Terminalia cattapa. Cangkang Terminalia cattapa dikarbonisasi biasa selama 3 jam. Rasio persentase massa granul karbon : KOH adalah 2: 1. Campuran butiran karbon dan KOH direndam dalam 200 mL air suling selama 12 jam, 24 jam dan 36 jam. Masingmasing selanjutnya diiradiasi dengan daya 630 watt untuk 20 menit. Sampel dikarakterisasi dengan mikroskop pindaian elektron, EDX dan luas permukaan. Kandungan karbon dan luas permukaan karbon aktif masing-masing berada dalam interval 66,93 % - 69,26 % dan 285,85 m2 /g - 293,36 m2 /g.

EFEK VARIASI DAYA IRADIASI GELOMBANG MIKRO TERHADAP KARBON AKTIF TONGKOL JAGUNG UNTUK PENJERNIHAN AIR Raysa Fadillah; Rakhmawati Farma; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 15, No 1 (2018)
Publisher : Universitas Riau

The power of microwave irradiation affect the quality of activated carbon. In this research the activated carbon has been made of biomass of corn cob by using carbonization process, chemical activation using potassium hydroxide as the activating agent and microwave irradiation power was variated for 360 watt, 450 watt, 630 watt, dan 720 watt in 15 minutes. The surface morphology of activated carbon for the sample KA720 produced lots of pores more than that of the sample KA360, KA450, and KA630. The sea water that has been mixed with activaed carbon using microwave irradiation power of 720 watt with temperatur of 26oC, and pH of 7,41.

PENYERAPAN LOGAM BERAT Pb DAN Cu MENGGUNAKAN KARBON AKTIF BERBASIS MAHKOTA NANAS DENGAN VARIASI KONSENTRASI KALIUM HIDROKSIDA Meylia Susiana Dewi Putri; Awitdrus Awitdrus; Rita Kartini Manullang
Komunikasi Fisika Indonesia Vol 17, No 1 (2020)
Publisher : Universitas Riau

This study aims to determine the influence of concentration of potassium hydroxide (KOH) on the adsorption of Pb2+ and Cu2+ metal ions in industrial used water. The activated carbon was prepared from pineapple crown waste. Pineapple crown was pre-carbonized at 180oC for 1 hours. Chemical activation was done using KOH with variations in concentrations of 2, 3, and 4 M. The samples were irradiated by using a microwave at 630 Watt of output power for 15 minutes. KOH activation and microwave irradiation power were influenced to the physical properties of the samples. Activated carbon obtained were characterized using SEM, EDX, FTIR and AAS. The results showed that highest adsorption were obtained from activated carbon that was activated by KOH 2 M. Adsorption efficiency for Pb2+ and Cu2+ metals were 81.15% and 49.71%, respectively. The carbon chain structure shows the functional groups C-H, C≡C, O-H, C=C at wavenumber 2889.49 cm-1, 2360.97 cm-1, 2339.97 cm-1.

PEMBUATAN ELEKTRODA KARBON DARI BIOMASSA SABUT KELAPA MUDA DENGAN AKTIVATOR KOH SEBAGAI APLIKASI SEL SUPERKAPASITOR Zurya Hanifa; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 19, No 1 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.1.45-50

The supercapacitor is a storage device consisting of carbon electrodes, separator, electrolyte, and current collector. Carbon electrodes made from young coconut coir biomass with a mass ratio of 1:0.20 KOH activator have been successfully fabricated with a carbonization temperature of 550 °C and a physical activation temperature of 750 °C. Characterization of physical properties by measuring the density value showed that before and after pyrolysis decreased due to KOH activating agent. Furthermore, the electrochemical characterization using the voltammetry cyclic method showed the specific capacitance value to the scanning rate, where the highest specific capacitance value was 163.14 F/g with a scanning rate of 1 mV/s.

PEMBUATAN DAN KARAKTERISASI KARBON AKTIF DARI SERABUT TANDAN KELAPA SAWIT SEBAGAI ADSORBEN DENGAN VARIASI AKTIVATOR KOH BERBANTUAN IRADIASI GELOMBANG MIKRO Rakhmawati Farma; Fitri Wahyuni; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

Penelitian ini bertujuan untuk mengetahui pengaruh persentase KOH terhadap karbon aktif yang dihasilkan sebagai penyerap metilen biru. Karbon aktif disediakan dari serabut tandan kosong kelapa sawit yang di pra-karbonisasi pada suhu 280℃ selama 4 jam. Aktivasi kimia dilakukan selama 25 jam dengan variasi KOH masing-masing dengan 25%, 50%, dan 75% dari massa karbon dan diiradiasi gelombang mikro selama 15 menit dengan daya 720 Watt. Daya serap metilen biru terbaik dihasilkan oleh karbon aktif dengan persentase KOH 75% sebesar 87,731 mg/g. Daya serap metilen biru tertinggi didukung oleh nilai Lc terbaik sebesar 2,897 nm.

KARAKTERISASI SIFAT ELEKTROKIMIA ELEKTRODA KARBON BERBAHAN PELEPAH AREN MENGGUNAKAN LARUTAN ELEKTROLIT Na2SO4 Decha Apriliany Suwandi; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.88-92

The electrical energy crisis occurs due to the availability of non-renewable sources of electrical energy. The focus of research is currently developing on how to store electrical energy using biomass energy. This study aims to analyze the electrochemical properties of the palm frond based carbon electrode using electrolyte solution of Na2SO4. Pre-carbonization of palm fronds was carried out using an electric oven with a temperature of 100 °C – 250 °C for 2 hours. Chemical activation using KOH activating agent with a concentration of 0.3 M at 80 °C for 2 hours. Carbonization was carried out at a temperature of 600 °C using an N2 gas environment and followed by a chemical activation process using CO2 gas at a temperature of 850 °C for 2.5 hours. Na2SO4 with a concentration of 0.5 M is used as a solution in the manufacture of supercapacitor cells. The scanning rate is inversely proportional to the specific capacitance value generated. Characterization of electrochemical properties was carried out using the cyclic voltammetry method resulting in a specific capacitance value of 61.71 F/g for a scan rate of 1 mV/s, 57.93 F/g for scan rate of 2 mV/s and 51.37 F/g for scan rate of 5 mV/s.

PEMBUATAN DAN KARAKTERISASI KARBON AKTIF DARI BAMBU BETUNG (DENDROCALAMUS ASPER) DENGAN AKTIVASI KOH BERBANTUAN GELOMBANG MIKRO Erin Mazelly Hutapea; Iwantono Iwantono; Rakhmawati Farma; Saktioto Saktioto; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

Telah berhasil dibuat karbon aktif dari bahan bambu betung (Dendrocalamus Asper)melalui proses pra-karbonisasi selama 1 jam dengan aktivasi kimia menggunakan KOH dengan perbandingan variasi massa karbon aktif dengan massa aktivator 1:0, 1:1, 1:2 dan 2:1. Pengaktifan dibantu iradiasi gelombang dengan daya mikro (µ) 630 Watt selama 20 menit. Penelitian bertujuan untuk mengkarakterisasi karbon aktif menggunakan difraksi sinar-X, spektroskopi inframerah transformasi fourier (FTIR) dan dayaserapmetilenbiru. Karakterisasi difraksi sinar-X menunjukkan karbon aktif memiliki pola difraksi semikristalin dengan kehadiran puncak pada sudut 2θ sebesar 21,268o dan 41,014o masing-masing bersesuaian dengan orientasi (002) dan (100). Tinggilapisan (Lc) tertinggi dihasilkan pada rasio 1:1 sebesar 21,495 nm dan data ini didukung oleh daya serap karbon aktif terbaik terhadap metilen biru yaitu pada rasio 1:1 sebesar 99,327 mg/g. Hasil karakterisasai FTIR menunjukkan karbon aktif memiliki serapan gugus –OH, C-H dan C=C. Secara keseluruhan hasil perhitungan dan analisis yang diperoleh menunjukkan bahwa banyaknya KOH mempengaruhi kualitas dari karbonaktif yang dihasilkan.

FABRIKASI DAN KARAKTERISASI ELEKTRODA KARBON DARI BIOMASSA SERABUT BUAH NIPAH DENGAN VARIASI KONSENTRASI AKTIVATOR KOH Ade Nur Indah Lestari; Rakhmawati Farma; Vepy Asyana; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 17, No 3 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.17.3.127-133

Today the need for electrical energy has increased due to the large number of electronic devices that require high electrical energy. To overcome this, a large storage of electrical energy is needed. One of the constituents of energy storage devices that is very important is the electrode. This study used nipah fibers as the basic material for electrodes, because the potential of nipah fruit has not been widely used. The purpose of this study was to determine the effect of KOH activator on the quality of activated carbon from nipah fruit fibers using variations of KOH activator concentrations 0.2 M, 0.3 M, and 0.4 M with sample codes SBN-02, SBN-03, and SBN-04. The manufacture of activated carbon electrodes is carried out through a process of pre-carbonization, chemical activation, carbonization, and physical activation. Characterization of TGA resulted in a resistant temperature of 296°C with a maximum speed of 0.166mg/min. XRD analysis produced a semicrystalline diffraction pattern consisting of two peaks around 24° and 44° at an angle of 2θ indicating the orientation of the hkl (002) and (001) planes.

EFEK PENAMBAHAN ATOM TEMBAGA (Cu) DAN PERAK (Ag) PADA MATERIAL AKTIF NANOMATERIAL ZnO SEL SURYA FOTOELEKTROKIMIA Windayani Windayani; Iwantono Iwantono; Awitdrus Awitdrus; Zulkarnain Zulkarnain
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

ZnO material coated with Cu + Ag was successfully grown using seed mediated hydrothermal method at a temperature of 90° C for 8 hours with a variation of concentration of Ag, 10 mM, and 20 mM. The growth of ZnO nanomaterials was carried out on the FTO substrate (Flourine Tin Oxide). The Samples were characterized using, Field Emission Scanning Microscope (FESEM), and X-ray Diffraction (XRD). The FESEM photos show ZnOnanorod coated with Cu + Ag have grown on FTO having a nanoflower shape that consructed from ZnOnanorods with their orientation . The XRD pattern shows five peaks at 2θ: 31.69 °; 34.36 °; 36,18 °; 47.52 °; and 56.4 °. Based on the results of the analysis of the OriginPro 8 program each peak in a row according to the crystal orientation (100), (002), (101), (012), and (110). The stongest line was found in the crystal plane (101). DSSC was fabricated using ZnO nanomaterial coated with Cu + Ag as active material, N719 dye, liquid electrolyte, and plastisol as catalyst on the counter electrode. The results of I-V measurements at halogen lamp with ilumination its intensity of 100 mW/cm2 of the cells has producedthe highest efficiency value based on Cu coated ZnO was based DSSC 0,98% with a Cu concentration of20mM.These results show that the addition of Cu layer can increase the efficiency of DSSC based on ZnO by 123% compared to ZnO without Cu based DSSC. Addition of Ag to active material of Cu coated ZnO nanomaterial did not have a positive effect on the efficiency of DSSC cells.

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

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