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All Journal Jurnal Ilmu Dasar Jurnal Rekayasa Mesin CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro Jurnal Penelitian Fisika dan Terapannya (JUPITER) Makara Journal of Science
Toruan, Parmin Lumban
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Control & Systems Engineering Education Electrical & Electronics Engineering Mathematics Mechanical Engineering Physics Other

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Morphological and Structural Studiesof ZnO Micro-Nanorod Structures Synthesized Using a Low-Cost Hydrothermal Method Alfarisa, Suhufa; Toruan, Parmin Lumban; Atina, Atina; Dwandaru, Wipsar Sunu Brams; Safitri, Rika Noor
Makara Journal of Science Vol. 22, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Micro-nanorod structuresof zincoxide (ZnO) have been successfully synthesized via a simple and low-cost hydrothermal method. ZnO solutions with different concentrations of 0.05 and 0.1 M were prepared using zinc nitrate tetrahydrate and hexamethylenetetramine precursors. They were dissolved inaquadesand stirred before the hydrothermal process at 95 °C for 4 hours in an oven. Extensive characterizations using scanning electron microscope (SEM) and X-ray diffraction (XRD) were conductedon ZnO powder samples. SEM results showed that hexagonally shaped ZnO micro-nanorods were formed with diameters ranging from hundreds of nanometers to several micrometers. The ZnO sample synthesized at 0.05 M was observedto have a better surface morphological structurethan the 0.1 M sample. In addition, XRD measurements confirmed that samples exhibited a hexagonal crystal structure of ZnO. Moreover, the calculated crystallite sizes of ZnO using the Debye-Scherrer equation using the full-width half maxima of the XRD peaks were 25.153 nm for the 0.05 M sample and 28.707 nm for the 0.1 M sample. The most prominent growth of ZnO had 101 plane orientation or nonpolara-plane followed by nonpolar 100 m-plane and 002 polar c-plane orientations.This studyoffersa simple andlow-costroute to producehigh-quality ZnO micro-nanorods for use in various electrical and optical devices.
Efek Waktu Milling Silika Abu Sekam Padi sebagai Filler Aspal Pen 60/70 terhadap Sifat Fisis dan Sifat Termal Sari, Kartika; Sunardi, Sunardi; Umana, Maghfirotul; Nonima, Maretah Nawang; Toruan, Parmin Lumban
Jurnal Rekayasa Mesin Vol 16, No 3 (2021): Volume 16, Nomor 3, Desember 2021
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v16i3.3055

Abstract

Aspal merupakan salah  satu  material memiliki sifat termoplastis yaitu mudah  mencair  jika dipanaskan sampai suhu tertentu dan membeku jika temperatur turun. Untuk meningkatkan sifat termoplastis aspal maka ditambahkanlah  bahan lain seperti silika sebagai filler. Sintesis paduan silika abu sekam padi sebagai filler aspal pen60/70 dengan variasi waktu tanpa milling (S0) dan dengan milling sebesar 15 jam (S15) dilakukan dengan tujuan untuk menentukan porositas, daya serap air, kapasitas panas dan kalor jenis.  Silika padi disintesis dengan metode sol gel. Serbuk silika abu sekam padi kemudian dimilling selama 15 jam. Komposisi paduan aspal pen60/70 dengan filler S0 dan S15 dibuat dengan perbandingan sebesar 1:2. Sampel dibuat dalam bentuk pellet. Kemudian, sampel dilakukan pengujian kapasitas panas dan kalor jenis dan daya serap air menggunakan alat uji Differential Scanning Calorimetry (DSC). Sedangkan, pengujian porositas menggunakan metode Archimides. Hasil uji porositas untuk sampel S0 dan S15 sebesar 6,0% dan 10,7%.  Hasil pengujian daya serap air untuk S0 dan S15 sebesar 5,3% dan 10,2%.  Sedangkan, hasil uji termal meliputi kalor jenis dan kapasitas panas menunjukkan nilai kalor jenis S0 dan S15 sebesar 7 J/kgK dan 1 J/kgK dan kapasitas panas S0 dan S15 sebesar 151,2 × 10-5 J/K dan 23,4 × 10-5 J/K. Sehingga, dapat disimpulkan bahwa silika abu sekam padi hasil milling atau dengan variasi waktu milling dapat diaplikasikan sebagai filler aspal penetrasi 60/70 untuk meningkatkan sifat fisik dan sifat termal.
Variations of Coconut Shell, Rice Husk, and Bagasse as an Alternative of Briquettes Materials Sari, Kartika; Anisyah, Anisyah; Toruan, Parmin Lumban; Setiawan, Andi Arif
Jurnal ILMU DASAR Vol 25 No 1 (2024)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v25i1.33864

Abstract

The current energy condition is getting thinner meanwhile people's daily lives still use a lot of energy derived from fossil fuels so that its use is increasing with limited availability. An alternative to reduce the use of fossil energy is by utilizing waste biomass as an energy source one of them is briquetts. This study aims to analyze the characteristics of briquettes from a variety of briquette mixtures made from coconut shells, rice husks, and bagasse. The method used is survey and experimental. The survey of sampling coconut shells was carried out in the Seberang Ulu I area, rice husks in the Pegayut area, and bagasse was obtained at the ice cane traders in the Seberang Ulu I area. The data obtained were presented in graphical form and analyzed descriptively. The results obtained are the water content in the variation of the combination of briquette-making materials ranging from 4.23 - 5.13%, ash content of 7.6 - 7.86%, the density value obtained is 0.55 - 0.59 g/cm3, the compressive strength value is 25.67 - 37.33 kg/cm2, and the calorific value is 4756 - 4865 cal/gr. The results showed there is not significant differences in moisture content, ash content, and compressive strength, while the density and calorific value showed significant differences.
Development of Bio Batteries Utilizing Coconut Dregs and Pineapple Extract as Alternative Energy Sources Toruan, Parmin Lumban; Wahyuni, Dita Putri; Rahmawati, Rahmawati; Atina, Atina
Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro Vol 8, No 2 (2024)
Publisher : PTE FTK UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/crc.v8i2.20933

Abstract

Coconut and pineapple dregs contain ions that can be effectively used as energy sources. This study aims to evaluate the electricity generated from varying compositions of coconut dregs and pineapple juice in bio-batteries. The bio-battery paste is created using different ratios of coconut dregs and pineapple juice, along with electrodes (aluminum and graphite). An experimental method was employed. The results indicated that the highest voltage of 0.54 V and a current of 0.71 mA were achieved with 40 ml of pineapple juice added to the coconut dregs, whereas the lowest voltage of 0.40 V and a current of 0.01 mA were observed without adding pineapple juice. For the pineapple juice concentration, the highest voltage of 0.51 V and a current of 0.91 mA were obtained with 10 grams of coconut dregs, while the lowest voltage of 0.44 V and a current of 0.31 mA occurred with 40 grams of coconut dregs. The concentration of coconut dregs and pineapple juice significantly affects the voltage produced, while the current is significantly influenced by the concentration of coconut dregs but not by the concentration of pineapple juice.
Development of a Bio-Battery Based on Key Lime Juice and MgSO₄ Electrolyte in a Solid Tapioca Flour Matrix Mita, Febria; Rahmawati; Toruan, Parmin Lumban; Rahman, Dui Yanto
Jurnal Penelitian Fisika dan Terapannya (JUPITER) Vol. 7 No. 1 (2025): Jurnal Penelitian Fisika dan Terapannya (JUPITER)
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/jupiter.v7i1.15934

Abstract

Research on bio-batteries as an environmentally friendly alternative energy source continues to progress. This study aims to determine the optimal composition of key lime juice and MgSO4 that produces the maximum current and voltage. Graphite sheets are used as the anode and aluminum sheets as the cathode. The volume of key lime juice is varied at 12 ml, 14 ml, 16 ml, 18 ml, and 20 ml, then 27 g of tapioca flour is gradually added and stirred until a solid electrolyte is formed. The solid electrolyte is then placed between the graphite and aluminum sheets. The optimal composition of key lime juice is then combined with varying masses of MgSO4 at 0.1 g, 0.2 g, 0.3 g, 0.4 g, and 0.5 g to achieve higher current and voltage. Measurements show that for bio-batteries using only key lime juice as the ion source, the maximum current and voltage obtained are 1.32 mA and 0.648 V, respectively, with an optimal key lime juice volume of 16 ml. Batteries using both MgSO4 and key lime juice as ion sources produce a current and voltage of 3.72 mA and 0.720 V, respectively, with an optimal mass of 0.2 g of MgSO4. This research is very promising for further development due to its simple method and the use of inexpensive and environmentally friendly materials.
Development of Bio Batteries Utilizing Coconut Dregs and Pineapple Extract as Alternative Energy Sources Toruan, Parmin Lumban; Wahyuni, Dita Putri; Rahmawati, Rahmawati; Atina, Atina
Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro Vol. 8 No. 2 (2024)
Publisher : PTE FTK UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/crc.v8i2.20933

Abstract

Coconut and pineapple dregs contain ions that can be effectively used as energy sources. This study aims to evaluate the electricity generated from varying compositions of coconut dregs and pineapple juice in bio-batteries. The bio-battery paste is created using different ratios of coconut dregs and pineapple juice, along with electrodes (aluminum and graphite). An experimental method was employed. The results indicated that the highest voltage of 0.54 V and a current of 0.71 mA were achieved with 40 ml of pineapple juice added to the coconut dregs, whereas the lowest voltage of 0.40 V and a current of 0.01 mA were observed without adding pineapple juice. For the pineapple juice concentration, the highest voltage of 0.51 V and a current of 0.91 mA were obtained with 10 grams of coconut dregs, while the lowest voltage of 0.44 V and a current of 0.31 mA occurred with 40 grams of coconut dregs. The concentration of coconut dregs and pineapple juice significantly affects the voltage produced, while the current is significantly influenced by the concentration of coconut dregs but not by the concentration of pineapple juice.
Co-Authors Alfarisa, Suhufa Andi Arif Setiawan, Andi Arif Anisyah, Anisyah Atina, Atina Jayawarsa, A.A. Ketut Mita, Febria Nonima, Maretah Nawang Rahman, Dui Yanto Rahmawati Rahmawati, Rahmawati Safitri, Rika Noor Sunardi Sunardi Syamsiar, Syamsiar Umana, Maghfirotul Wahyuni, Dita Putri Wipsar Sunu Brams Dwandaru