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Journal of Energy, Material, and Instrumentation Technology
Published by Universitas Lampung
ISSN : 27472043     EISSN : 2747299X     DOI : https://doi.org/10.23960/jemit
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Ruang lingkup penulisan dalam jurnal ini meliputi: 1. Fisika Teori Mekanika Klasik Elektromagnetik Termodinamika Mekanika Statistik Mekanika Kuantum Teori Relativitas Kuantum Gravitasi Astrofisika Kosmologi 2. Fisika Bumi (Geofisika) Geothermal Geolistrik Seismik Geomagnet 3. Fisika Material Nanomaterial Logam dan Korosi Material Magnetik Thin Film Fotokatalis/Katalis Semikonduktor Superkonduktor Keramik Polimer 4. Elektronika dan Instrumentasi Sensor Instrumentasi Biomedik Instrumentasi Pertanian Instrumentasi Lingkungan Biofisika Fisika Komputasi Laser 5. Fisika Nuklir Keselamatan Reaktor Analisis Neutronik Manajemen Bahan Bakar dan Limbah
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 121 Documents
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Production of Nanocellulose from Kepok Banana Peel Waste Using Acid Hydrolysis Method Putri, Faradilla Nabila; Manurung, Posman; Suciyati, Sri Wahyu; Karo, Pulung Karo
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 3 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i3.174

Abstract

Research on the production of nanocellulose from kepok banana peel waste has been carried out using the Acid Hydrolysis method with H2SO4 Sulfuric Acid. This study aims to determine the effect of giving H2SO4 on kepok banana peels and the crystal structure and surface morphology of nanocellulose on kepok banana peels. The production of nanocellulose was carried out in three stages: delignification using 10% NaOH, bleaching using 10% H2O2, and isolation of nanocellulose using H2SO4 with various concentrations of 5, 10, 15, and 20%. This research uses X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) as its characterization. The resulting crystallite size ranges from 3.58 to 4.15 nm, producing a lump-like morphological structure.
Pengaruh Variasi Konsentrasi Zn(NO3)2·6H2O Terhadap Gugus Fungsi, Ukuran Partikel, dan Morfologi Partikel Nanopartikel ZnO dengan Metode Sintesis Hijau Menggunakan Ekstrak Daun Kelor Benyamin, Chairunissa A; Manurung, Posman; Suprihatin, Suprihatin
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 3 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i3.208

Abstract

This research was conducted to determine the effect of varying concentrations of Zn(NO3)2·6H2O (zinc nitrate hexahydrate) on functional groups, particle size, and particle morphology of ZnO nanoparticles using the green synthesis method using Moringa leaves. The materials was used in this study were moringa leaf extract, Zn(NO3)2·6H2O with various concentrations of 0.2, 0.4, 0.6, and 0.8 M, and NaOH of 0.1 M. Based on the results of characterization using FTIR, it shows that the functional groups in the content of Moringa leaves play a role in the formation of ZnO nanoparticles. Meanwhile, the results of the XRD characterization showed a diffractogram difference with standard ZnO at concentrations of 0.6 M and 0.8 M Zn(NO3)2·6H2O with the appearance of the NaNO3 phase. SEM characterization results show that the morphology of ZnO nanoparticles using the green synthesis method is irregular in shape.
Design of a Classroom Noise Monitoring Tool Using a KY-037 Sound Sensor Based on Wemos D1R1 Rifqah, Raden Ayu Nurfadhillah; Suciyati, Sri Wahyu; Surtono, Arif; Pauzi, Gurum Ahmad
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 4 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i4.118

Abstract

The noise level in the room is one of the factors that can influence teaching and learning activities. Research on classroom noise levels has been done using the Wemos D1 R1-based KY-037 sound sensor. This research aims to determine the noise level in the classroom and be able to monitor the noise level in the room. Data collection was carried out by sound detection in the classrooms of SMA Negeri 13 Palembang from 07.00 – 12.00 WIB for seven days. The research results show that the system is functioning well, indicated by the situation when the noise level is less than 45 dB, and the LED lights up. When the noise level is more than or equal to 45 dB, then the yellow LED, mini DFPlayer, and speaker will light up, and when the noise level is more than or equal to 55 dB, then the red USB LED, mini DFPlayer, and speaker will light up. Data on noise levels and LED conditions received can be monitored via the web server. The system used on the web server is localhost access on a computer that can be monitored within the school environment.
The Microbial Fuel Cell Characteristics of the PVA/Chitosan Membrane with Variations of Phosphate Acid and Sodium Alginate Derived from Vegetable Waste Nugraha, Iqbal Adi; Supriyanto, Amir; Pauzi, Gurum Ahmad; Junaidi, Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 4 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i4.131

Abstract

Microbial Fuel Cell (MFC) is one of the alternative energy sources as a producer of vegetable waste. The membrane that is commonly used in the MFC system is the Nafion membrane, but it is expensive and must be imported. PVA membrane and chitosan are an alternative substitute for Nafion membrane. The purpose of this study was to determine the electrical performance of variations of PVA/Chitosan membrane with the addition of sodium alginate or phosphoric acid. The study used a dual chamber MFC system made of acrylic with a volume of ±250 ml for each compartment. The anode compartment contains vegetable waste with carbon electrodes, and the cathode compartment contains seawater electrolytes with Cu(Ag) electrodes. The MFC system consists of 10 cells in series. From the study results, it was concluded that the vegetable waste substrate with the addition of EM4 bacteria could be used as an alternative energy source. The use of variations on the PVA/Chitosan membrane without addition produces the highest maximum voltage level of 2.25 volts compared to the addition of sodium alginate or phosphoric acid of 2.25 volts, 1.941 volts, and 2.1 volts.
Analysis of the Effect of Variations of Silica Concentration on Synthesis γ-Al2O3 Fuadiyah, Nadhifatul; Marjunus, Roniyus; Rustyawan, Wawan; Syafriadi, Syafriadi
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 1 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i1.144

Abstract

Research has been carried out to analyze the effect of variations in silica concentration on the synthesis of γ-Al2O3. This research was conducted to determine the variation of Silica against the support γ-Al2O3which is the best as a hydrotreating catalyst in the green fuel industry by using several physical characteristics and analyzing the effect of silica variations on the surface area, pore volume, and pore size of the support. This study uses materials such as Boehmite (AlOOH), equates, 25% NH4OH solution, 6% HNO3, and several variations of Silica such as (Carboxyl, SIRAL, and ZSM). In the process of making supports γ-Al2O3with the sol-gel method in order to homogenize the solutions and silica powders as a buffer variant, it becomes AlOH powder, which is then printed with a press and calcined at a temperature of 550oC gradually to become powder.buffer γ-Al2O3. From the study results, the best variation of γ-Al2O3 silica buffer was carboxyl with a concentration of 6% because several characterization studies showed superior results to γ-Al2O3 support without silica variation. The results of the Surface Area Analyzer characterization greatly affect the hydrotreating catalyst process in the green fuel industry, namely the γ-Al2O3 buffer with the addition of 6% silica carboxyl concentration. This is because a large surface area, pore size, and large pore volume can contain more impregnant solution, and the amount of active phase dispersed will also be greater.
Prototype of a Digital Measuring Device Based on Atmega 328P for Measuring Current, Voltage, Electrical Power, and RLC Components Putri, Risa Amelia; Supriyanto, Amir; Surtono, Arif
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 2 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i2.157

Abstract

Research on digital measuring device prototypes has developed over the past few years. However, there are still challenges in measuring current, voltage, electrical power, and RLC component parameters accurately. This research aims to design a digital system to measure electrical quantities such as current, voltage, resistance, inductance, and capacitance using Atmega 328P. Data retrieval is done by implementing the system as a whole, namely the AC and DC electrical measurement system and the measurement of RLC components. The results showed that the system can measure and display the result of measuring current, voltage, electric power, and RLC components correctly. The accuracy percentage for the components measuring instrument on the resistor test is 99.35%, the error is 0.65%, and the precision is 99.87%. In the inductor test measurement, the percentage value of accuracy is 94.11%, the error is 5.89%, and the precision is 96.77%. In the capacitor test measurement, the accuracy percentage is 98.03%, the error is 1.97%, and the precision is 98.65%. On the DC voltage sensor, the accuracy percentage is 97.31%, error 2.69%, and precision 99.77%.
Design and Electrical Characterization of Plant Microbial Fuel Cell (PMFC) Using Eichhornia crassipes by Varying the Electrode Distance and Effect Light of the Sun Suryani, Mei; Pauzi, Gurum Ahmad; Junaidi, Junaidi; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 1 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i1.159

Abstract

The Plant Microbial Fuel Cell (PMFC) design using water hyacinth has been successfully created. The PMFC was then treated by varying the distance of the electrode and giving the effect of sunlight. The electrodes used are Cu-Zn pairs where the electrode distance varies, with values of 3, 6, 9, and 12 cm. Furthermore, the data was taken with PMFC conditions placed outside and indoors for 14 days (331 hours). The results showed that PMFC with an electrode distance of 3 cm produced a more excellent value of electrical power than the other electrode distances, which was 0.6786 mW on the second day at the 37th hour or in the afternoon at 13.00 WIB. In general, the electrical characteristics produced by PMFCs, which are affected by sunlight, produce greater electrical power than PMFCs indoors.
PEMANFAATAN LIMBAH KULIT SINGKONG UNTUK PRODUKSI ENERGI LISTRIK MENGGUNAKAN RANGKAIAN JOULE THIEF DENGAN TEKNOLOGI MICROBIAL FUELL CELL (PENAMBAHAN RAGI DAN ASETAT) Situmorang, Elfrina; Supriyanto, Amir; Surtono, Arif; Junaidi, Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 3 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i3.160

Abstract

The Cassava peel waste can be used as a substrate in the Microbial Fuel Cell (MFC) system to produce electrical energy. MFC was made of acrylic with a size of 9×9×11 cm with a dual chamber type that can accommodate a substrate volume of ±350 ml. The MFC system consists of 10 cells arranged in series with voltage and current measurements every 2 hours for 72 hours using a multimeter. The maximum power MFC produces by adding 16 ml of acetate using a joule thief amplifier circuit is 8.42 W. In contrast, the addition of 24 gr yeast produces a maximum power of 7.82 W; without any addition, it produces 7.74 W of power. The amplifier also produces pretty good power. The maximum power produced by MFC without an amplifier circuit with the addition of 24 gr yeast is 2.51 mW, while 16 acetate is 2.18 mW. Without any addition, it produces 1.91 mW of power.
The Effect of H2SO4 Variations on the Synthesis and Characterization of Nanocellulose Using Pineapple Peel Fiber Sitohang, Rosanti; Manurung, Posman; Suciyati, Sri Wahyu; Karo, Pulung Karo
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 2 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i2.168

Abstract

Manufacturing nanocellulose made from pineapple peel fiber has been carried out using acid hydrolysis. This study aims to determine the effect of variations in H2SO4 on the synthesis of nanocellulose in pineapple peel fibers and on the crystal structure, surface morphology, and constituent elements of pineapple skin fiber nanocellulose. The variations of H2SO4 used were 5, 10, 15 and 20%. X-ray diffraction (XRD) and Scanning Electron microscopy (SEM) are characterizations used. The results of XRD characterization showed that the size of the resulting crystallite had met the appropriate size in the range of values from 2.03 – 2.21 nm. The results of SEM characterization show that the image is not porous and lumpy.
Effect of Variation H2SO4 on the Manufacture of Nanocellulose from Corn Cobs Pertiwi, Mega; Manurung, Posman; Suciyati, Sri Wahyu; Karo, Pulung Karo
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 3 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i3.173

Abstract

The acid hydrolysis method has been used to manufacture nanocellulose from corn cobs. This study aims to determine the effect of variations in the concentration of H2SO4 on the characteristics of nanocellulose produced from corn cobs and their surface morphology. The variations of H2SO4 used were 5, 10, 15, and 20%. X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) are characterizations used. The results of XRD characterization showed that the crystallite size obtained followed the nanocellulose crystallite size, which was 1.79-2.59 nm. The SEM characterization showed that the resulting nanocellulose's surface morphology was lumpy and non-porous.

Page 8 of 13 | Total Record : 121

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