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Journal of Experimental and Applied Physics
Published by Universitas Negeri Padang
ISSN : 29880378     EISSN : 29879256     DOI : -
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
Journal of Experimental and Applied Physics: an international peer-reviewed open-access journal dedicated to interchange for the results of high-quality research in all aspects of theoretical physics, applied physics, electronics and instrumentation, material physics, biophyiscs, geophysics, high energy physics and computational physics.
Arjuna Subject : Fisika dan Astronomi - Instrumentasi
Articles 81 Documents
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Microstructure Analysis of Mass Variations of LiOH/Cassava Peel Activated Carbon Nanocomposite Lidya Agraini; Yenni Darvina
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.43

Abstract

The need for electronic devices has grown quite rapidly. To operate electronic devices, batteries are needed. The most widely used battery is a rechargeable battery type lithium ion battery. the advantages of using rechargeable batteries are practical and easy to carry everywhere. One of the disadvantages of rechargeable batteries is not able to work at high power. For this reason, it is necessary to conduct research on the forming material on the battery anode. This study was intended to characterize the structure, field and crystal size of the mass variation of LiOH/cassava peel activated carbon nanocomposite synthesized using the sol gel method with a mass variation ratio of 40%: 60%, 50% : 50%, and 60%: 40%.The LiOH/cassava peel activated carbon nanocomposite was mixed with PEG 6000 solution stirred at 100º C to form a gel which was dried and pulverized. XRD characterization was carried out and analyzed using High Score Plus software. Carbon has a cubic crystal structure with a diffraction peak of 29.41º. Activated carbon has a hexagonal crystal structure with diffraction peaks of 31.53º and 44.48º. The nanocomposite has a crystal structure that is hexagonal and orthorhombic for the carbon phase, while LiOH is monoclinic with different miller indices. The nanocomposite crystal size is 26.33 nm to 79.01 nm, with the smallest crystal size found when the LiOH/activated carbon nanocomposite variation is 40%: 60%. From the three comparisons, the more carbon the smaller the crystal size.
Lattice Constants, Structure, and Crystal Size of Nanocomposites LiOH/Activated Carbon and Rough Bamboo with Mass Variation Yulia Febrina; Yenni Darvina
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.44

Abstract

Energy development is needed in everyday life, one of which is electrical energy. Batteries are reliable electrical energy in the operation of portable electronic devices. Batteries that are often used are lithium batteries. Lithium batteries have the ability to charge quickly, last long and have high energy power. The reality is that batteries often overheat, affecting the work of the battery. Efforts to improve the performance of lithium batteries are to improve the quality of the anode material. This study aims to determine the lattice constant, structure, and crystal size of carbon, activated carbon, LiOH and variations of LiOH nanocomposite/ rough bamboo activated carbon. This research uses the sol gel method and is characterized using XRD. The mass variations used are 40%: 60%, 50% : 50%, 60% :40%. Carbon has a cubic crystal structure, crystal size of 103 nm. Peak addition occurs on activated carbon because it undergoes an activation process. Activated carbon has a hexagonal crystal structure, smaller crystal size than carbon which 25 nm - 62 nm. LiOH has a tetragonal crystal structure, crystal size 81 nm - 108 nm. The LiOH phase generally has a tetragonal crystal structure, and the carbon phase has a rhombohedral crystal structure. In the 40%: 60% variation has the smallest crystal size of 23 nm - 42 nm, because the addition of activated carbon is more than LiOH so that it affects the crystal size. If the addition of activated carbon is more than LiOH, the crystal size will be smaller.
Effect of Variations in Mass Composition of TiO2/Activated Carbon Cassava Peel on Crystal Structure and Size Faadhilah Fauziyah; Yenni Darvina; Ratnawulan Ratnawulan; Gusnedi Gusnedi
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.45

Abstract

A battery is a tool used to store electrical energy to obtain electricity so that it can be used to power remotes, cellphones, laptops, cameras and other electronic items. The working indicator of a battery is capacity, its electrochemical cycling capability depends on the anode material. In general, battery anodes are made using graphite. However, graphite has limitations, namely that it can easily cause short circuits. Because graphite has limitations, a replacement for graphite from TiO2 nanocomposites with activated carbon will be made. Nanocomposites are new materials that are formed by combining two or more compounds to produce new properties and have nanoscale dimensions. TiO2 is used because it can reduce short cycles, has good stability, high current density and can increase battery performance capacity. Activated carbon is used to expand the surface of the material to obtain a large capacitance. The activated carbon used in this article is cassava peel from unused waste in order to reduce environmental pollution and increase the economic value of the waste. The aim of this research is to produce TiO2/Activated Carbon nanocomposites to test their crystal structure and size using XRD. TiO2/Activated carbon nanocomposites were obtained using the sol-gel method. Variations in the mass composition of TiO2/Activated Carbon used are 40%:60%, 50%;50%, and 60%:40%. Based on the tests that have been carried out, the smallest crystal size was obtained with a variation of 40%:60%, namely 58.4 nm with a Tetragonal structure for TiO2 while Cubic and Rhombohedral for carbon.
Seismotectonic Analysis and Seismic Potensial of The Sumatra Region Using The Guttenberg-Richter Method Yoga Yusrila; Syafriani Syafriani; Hamdi Hamdi; Letmi Dwiridal
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.46

Abstract

Sumatera is one of the most seismically active regions in Indonesia. This is due to the presence of subduction zones and active faults that influence the plate tectonic activity of the region, resulting in many earthquake events that cause damage and loss. One of the efforts to mitigate earthquake disasters is the analysis of seismotectonic parameters, which are indicated by the a-value and b-value of the Gutenberg-Richter equation in the earthquake frequency-magnitude relationship. Low seismotectonic parameters (a-value) and (b-value) can be interpreted as low seismic activity and high local rock stress conditions, and vice versa high (a-value) and (b- value). In this study, the analysis was performed spatially and temporally from the National Earthquake Information Center United States Geological Survey (NEISUSGS) earthquake catalogue. The data obtained in the form of longitude, latitude, depth, magnitude, time and location of the earthquake event, the data are limited to M ≥ 4.0Mw and Depth ≤ 350KM in the Sumatera region with the boundaries of 6030'LU-6°30'LS and 94BT-106°BT for the period 1990-2022. Based on the estimation results of the Guttenberg-Richter method in ZMAP v6 software, the b-value is 0.92-1.04 and the a-value is 7.42-7.97, with a return period of 6.5 Mw earthquakes generally ranging from 5-25 years.
Mapping the Peak Ground Acceleration Value and Seismic Intensity in Pesisir South District Area using The Empirical Formulation of SI and Midorikawa Muhammad Aulia Fauzi; Syafriani Syafriani
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.47

Abstract

The South Pesisir is an area that is prone to earthquakes, because it is in a zone that is traversed by the Sumatran fault, subduction zone and Mentawai fault. The 3 earthquake zones are areas that have an active level of seismicity from which the maximum ground acceleration value and earthquake intensity can be calculated. This research aims to determine and map the peak ground acceleration and seismic intensity values ​​to support development planning and spatial planning in the South Pesisir District area.This type of research is descriptive research, namely by collecting earthquake catalog data sourced from the USGS (United States Geological Survey) in the period 1973-2023 with coordinates -2.35°S – -1.04°N and 99.32°E – 101.27°E . The magnitude used is M ≥ 5 SR and a maximum depth of 300 Km. The method used in processing the peak ground acceleration data is the empirical formulation of Si and Midorikawa attenuation, then the peak ground acceleration and seismic intensity data output is displayed with ArcGis 10.8 software.The results obtained from calculating the higgest peak ground acceleration were in Lengayang District, Air Pura District, Pancung Soal District, and Basa IV Balai Tapan District with a value of 225.53 – 526.57 gal, while the lowest ground acceleration value was in Koto XI Tarusan District , Bayang District, North Bayang District, and Silaut District with a value of 16.15 – 27.91 gal. Meanwhile, the highest seismic intensity is in Lengayang District VIII MMI and the smallest seismic intensity is in Bayang District, North Bayang District, and Silaut District, namely IV MMI.
Effect of Tetraethoxysilane Addition to Coconut Coir Ash Nanosilica on Morphology and Particle Size of SiO2-TiO2 Nanocomposite Triana Dwi Restika; Ratnawulan Ratnawulan
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.48

Abstract

Nanotechnology is not possible without nano-sized materials. Nanomaterials can be used to produce composites that can be used in various fields, including in industry as fabric coating materials by providing certain properties to fabrics, one of which is water repellent properties. By adjusting the shape and size of the microscopic elements that comprise the nanocomposite, these water-repellent characteristics may be changed, changing the surface morphology, and interacting with the particles through the incorporation of two or more materials. Therefore, the goal of this research is to ascertain how the effect of tetraethoxysilane as a co-precussor SiO2 and as coupling agent on the SiO2-TiO2 nanocomposite layer. This type of research is experimental. Starting with the grinding of coconut fiber ash using HEM-E3D, the experiment continued with the extraction of silica using the sol-gel method and checking its composition with XRF. Next, the prepared nanocomposites were applied to the fabric. Furthermore, the nanocomposites were characterized by SEM and contact angle testing was conducted. The results of this study show that nanocomposites have better properties than their constituent particles. With the variation of adding 7 milliliters of tetraethoxysilane, the smallest particle size reaches 51 nm, and produces the best contact angle of 148°.
Effect of Fe3O4 Nanoparticle and Graphene Oxide Compositions on The Magnetic Properties of Fe3O4 : Graphene Oxide Nanocomposites Dinda Ramadhani; Rahmat Hidayat; Ratnawulan Ratnawulan; Yenni Darvina
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.50

Abstract

Magnetic material research aims to determine the effect of variations in the addition of Fe3O4 nanoparticles to graphene oxide. Graphene oxide made from coconut shell waste was synthesized using the modified hummers method and composited with Fe3O4 nanoparticles consisting of three composition variations, which are 20%:80%, 30%:70% and 40%:60%. The Fe3O4-Graphene Oxide nanocomposite was tested using three characterization tools, namely XRD, FTIR and VSM. Testing using XRD and FTIR was carried out to determine whether the Fe3O4-Graphene Oxide nanocomposite had been formed or not. In XRD testing, a crystal size of 39.57 nm was obtained, which means that this research has succeeded in forming nanocomposites where the size obtained is smaller than 100 nm. In FTIR testing, it can also be seen that this research has succeeded in forming Fe3O4-Graphene Oxide nanocomposites as seen from the functional groups obtained, which consist of oxygen, hydrogen, carbon and iron. In testing using VSM, it can be seen how the effect of adding Fe3O4 to graphene oxide, where the greater the addition of Fe3O4 composition, the greater the value of the coercivity field produced. In addition, the addition of Fe3O4 causes an increase in the magnetic properties of remanent magnetic, saturation magnetic  and coercivity values. The coercivity values are 371.18 Oe, 387.59 Oe and 405.19 Oe, respectively, where the highest coercivity value is found in the 40% variation: 60%. This hail shows that the nanocomposite produced is ferromagnetic and classified as a hard magnet so that it can be applied as HDD.
Water pH Measurement Instrument using Titration Methods Kurnia Illahi; Yohandri Yohandri; Fajar Mukharom Darozat
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.51

Abstract

Indonesian aquaculture is one of the activities supporting production and economic activities in the fisheries sector locally and nationally. The endurance of the fish body is very dependent on the quality of the water used. One of the water quality parameters is the degree of acidity (pH). The problem in measuring the pH of water is the limited use of the pH meter sensor because the sensor probe must be cleaned regularly. One solution to overcome this problem is to make a water pH measuring instrument for aquaculture using the titration method. This tool is designed to make it easier for aquaculture farmers to measure the pH quality of water without touching the fish pond water. Research was conducted to determine the tool's design and performance specifications. The performance specifications of the water pH measuring instrument consist of mechanical design and electronic design. The results of the color reading of the pH value of the device can be displayed on a serial monitor through the Arduino IDE application or on the Bluetooth terminal serial application on Android. The design specifications of the water pH measuring instrument consist of the accuracy and accuracy of the measurement of the pH value of water with the following details: The average pH value reading error is 1.027% with an average accuracy of 98.973% and an average accuracy of 99.419%.
Consistency of Magnetic Susceptibility Values in Raw Mix 2 using Bartington Magnetic Susceptibility Meter Sensor Type B Julio Fadjar Kolotosa; Hamdi Hamdi; Fatni Mufit; Letmi Dwiridal
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.52

Abstract

The process of making cement goes through quite long stages, one of the processes is grinding at the Raw Mill. Raw Mill is divided into two large groups, Horizontal Mill and Vertical Mill, in Horizontal Factory. The milling result at the Horizontal Mill is Raw Mix 2 and quality testing will be carried out. In quality testing, testing is usually carried out on chemical parameters and there is no testing based on physical parameters. By looking for the magnetic susceptibility score of raw cement samples in Raw Mix 2 using the Bartington Magnetic Susceptibility Meter Type B sensor, you can see the consistency of magnetic minerals in raw cement in Raw Mix 2. Samples were taken from the Padang Semen Factory every hour of every day from February 1 to February 10, 2022, the samples were then measured using the Bartington Magnetic Susceptibility Meter Type B Sensor. The measurement results showed that the magnetic susceptibility value of Raw Mix 2 ranged from 79.8 x/kg to 206.9 x/kg, and standard deviation calculations were used. The data is interpreted into a graph and it shown that the magnetic susceptibility value of Raw Mix 2 obtained can be said to be consistent and of good quality. The magnetic properties of Raw Mix 2 obtained according on the magnetic susceptibility score obtained are antiferromagnetic. The grain type in Raw Mix 2 was found to have almost no superparamagnetic grains or contained less than 10% superparamagnetic grains.
Composition Effect of Fe3O4 and Graphene Oxide on The Microstructure of Fe3O4-Graphene Oxide Nanocomposite Mifta Damayani
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.53

Abstract

The manufacture of lithium ion batteries is a solution to future energy limitations, but lithium ion batteries have a high price. The best solution to overcome the high price of lithium ion batteries is to make lithium ion battery electrodes from Fe3O4 nanoparticles. To optimize the performance of Fe3O4, it will be combined with graphene oxide made from coconut shell. This study aims to analyze the effect of Fe3O4:Graphene Oxide composition (40%:60%, 30%:70%, and 20%:80% ratio) on the microstructure of Fe3O4-Graphene Oxide nanocomposite which includes crystal size, functional groups, and surface morphology. The method used to make graphene oxide is by using the modified hummers method because this method is faster, safer, and has higher efficiency. The mixture of Fe3O4 variation with graphene oxide will be characterized using XRD, FTIR, and SEM. The result of XRD obtained crystal size for Fe3O4-Graphene Oxide nanocomposite composition 40%: 60% is 44.73 nm, for the composition of Fe3O4-Graphene Oxide nanocomposite 30%: 70%, the crystal size is 39.71 nm, and for Fe3O4-Graphene Oxide 20% nanocomposite composition: 80%, the crystal size is 45.64 nm. FTIR results showed the presence of C-H, O-H, C≡C, C=O, C-O bonds, and the presence of Fe-O absorption peaks indicating the success of the Fe3O4 with graphene oxide composite. SEM analysis results showed that the surface morphology of Fe3O4-Graphene Oxide nanocomposite has a spherical structure, which can be seen that the more Fe3O4 composition in the composite, the larger the graphene oxide surface is covered.

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