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JPSE (Journal of Physical Science and Engineering)
Published by Universitas Negeri Malang
ISSN : 25412485     EISSN : 25412485     DOI : -
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
JPSE (Journal of Physical Science and Engineering) is published twice a year in April and October by Physics Department of Universitas Negeri Malang, Indonesia. e-ISSN: 2541-2485 The journal is devoted to publishing original, frontier and important of various branches of Physics Science and Engineering. Editors welcome scholars, researchers and practitioners of Physics around the world to submit scholarly articles to be published through this journal (free of charge).
Arjuna Subject : -
Articles 99 Documents
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Fabrication and Characterization of GO-Fe3O4/PSF Membrane with Phase Inversion Method Vivia Maulida Alfianti; Munasir Munasir
JPSE (Journal of Physical Science and Engineering) Vol 6, No 2 (2021): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Polysulfones are hydrophobic which can reduce membrane permeability. Permeability can be increased through the application of hydrophilic materials such as GO-Fe3O4 to the polysulfone membrane so that the membrane is hydrophilic. The riset purpose to determine the effect of the percentage weight of different material compositions on the hydrophilicity properties of the polysulfone membrane. Membrane fabrication is carried out using the phase inversion method where the polymer solution is molded in a place and immersed in a coagulation bath containing non-solvent. This solvent exchange causes the polymer to form a solid matrix and become a membrane. The results showed that GO particles were successfully doped with Fe3O4 material shown by XRD analysis at a peak of 35.61˚ with a magnetite phase, while FTIR analysis showed that there was an absorption band characteristic of Fe-O streching vibrations. The results of the contact angle test on the GO-Fe3O4/PSF membrane 0.75 wt per cent were around 73.17˚ which showed the smallest hydrophobic value and the membrane surface morphology had an average pore size of 333.61 nm so that the addition of GO-Fe3O4 composites could increase membrane hydrophilicity.DOI: 10.17977/um024v6i22021p055
A Study on Phase and Microstructure of Reduced Graphene Oxide Prepared by Heating Corncobs Kusuma Wardhani Mas'udah; Ahmad Taufiq; Sunaryono Sunaryono
JPSE (Journal of Physical Science and Engineering) Vol 5, No 2 (2020): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

The purpose of this study was to find out reduced graphene oxide (RGO) phases by identifying the system, elemental system, and microstructure of corncobs. Characterization was carried out by XRD and SEM-EDX spectroscopy. The temperatures used in this work are 100, 200, and 250 ºC with a holding time of 1 hour. XRD analysis shows that the RGO phase is formed by the structure of the aromatic layer arrangement (graphite 002), and the widening comes from small-dimensional crystallites perpendicular to the aromatic layer (graphite 120). The elements contained in the three samples have a dominant proportion in the elements carbon and oxygen. From the SEM results obtained the morphology of corncobs powder that looks like sheets. The reduced graphene oxide phase is formed from the process of reducing corncobs powder.DOI: http://dx.doi.org/10.17977/um024v5i22020p066
The External Electric Field Effect to Hydrogen Storage on B-N Co-Doped Graphene Surface Decorated by Metal Atoms: A DFT Study A. Sarmada; Susiani Pupon
JPSE (Journal of Physical Science and Engineering) Vol 4, No 2 (2019): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Hydrogen has been concerned to be an ideal clean energy carrier among the other renewable energy sources because of its environmental friendliness. However, some challenges have to be addressed before hydrogen will become a conventional and commonly available energy carrier. For instance, the volumetric energy of hydrogen has an issue such as controlling in ambient condition with reliable utilities in nowadays gadget that from day-to-day become lighter and lighter. Recently, carbon-based materials such as graphene and carbon nanotubes have been designed for hydrogen storage due to their large surface area, lightweight, and tunable properties. In this study, we have considered Boron and Nitrogen co-doped graphene surface (BNDG) because B–N pair is isoelectronic to the C–C pair and investigated its hydrogen storage capacity by decorating  different metal atoms. However, controlling the binding strength of metal atoms with that of the BNDG surface is an important issue in the application of hydrogen storage. The recent studies have shown that the binding strength between the metal atom and the substrate can be controlled by means of applying an external electric field. Thus, the effects of the external electric field on the designed medium towards its hydrogen storage capacity is explored. Using density functional theory approach, we showed the adsorption energy of molecular hydrogen as the key of storage capacity on the B, N doped graphene increased due to the higher applied electric fieldHydrogen has been concerned to be an ideal clean energy carrier among the other renewable energy sources because of its environmental friendliness. However, some challenges have to be addressed before hydrogen will become a conventional and commonly available energy carrier. For instance, the volumetric energy of hydrogen has an issue such as controlling in ambient conditions with reliable utilities nowadays gadgets that from day-to-day become lighter and lighter. Recently, carbon-based materials such as graphene and carbon nanotubes have been designed for hydrogen storage due to their large surface area, lightweight, and tunable properties. Controlling the binding strength of metal atoms with that of the BNDG surface is an important issue in the application of hydrogen storage. Recent studies have shown that the binding strength between the metal atom and the substrate can be controlled by means of applying an external electric field. In this study, we have considered Boron and Nitrogen co-doped graphene surface (BNDG) because B–N pair is isoelectronic to the C–C pair and investigated its hydrogen storage capacity by decorating different metal atoms. We utilize the DFT calculations study to investigate the hydrogen storage properties materials. By applying an external electric field on the Ti3 decorated BNDG sheet, we have demonstrated that the adsorption energy of H2 molecules can be increased substantially and thereby can tune the overall hydrogen storage capacity. These theoretical predictions can serve as a guiding reference to experimental works in developing efficient hydrogen storage materials for practical implementations. DOI: http://dx.doi.org/10.17977/um024v4i22019p074
Study of Surface Morphology and Porosity of Composite Scaffold Nanofiber PVA/CS/HA with Electrospinning Method Hartatiek Hartatiek; Nasikhudin Nasikhudin; Abdul Aziz Dwi Putra; Yudyanto Yudyanto
JPSE (Journal of Physical Science and Engineering) Vol 6, No 1 (2021): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

This research aims to compose nanofibers as a scaffold material in bone tissue engineering in terms of surface morphological properties and porosity. HA nanorod was prepared by the precipitation-ultrasonication method, while the PVA/CS/HA nanofiber composites were made by the electrospinning method using a static collector. HA was characterized by using XRD and SEM-EDX, while the PVA/CS/HA nanofiber composites used FTIR and SEM. The results show that HA nanorod has a crystalline size of 10.86 nm, crystallinity level of 52.38 per cent, and Ca/P ratio of 1.70. From the SEM image shows HA nanorod width of 11.6 nm and 97.53 nm in length and some of it still in the form of HA nanoparticles. The diameter and porosity of PVA/CS/HA nanofiber with addition of 0, 10, 20 per cent HA were 275, 212, 265 nm and 72.94, 69.49, 70.81 per cent, respectively.DOI: 10.17977/um024v6i12021p026
Analysis of Remote Sensing, Gravity, and Magnetotelluric Data on Geothermal Fields in Ogan Komering Ulu (OKU) District, South Sumatra Okta Dwi Puspita; Reinaldi Juniarto; Sava Sintya Larasati; Hafiz Hamdalah; Iqbal Takodama
JPSE (Journal of Physical Science and Engineering) Vol 5, No 1 (2020): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Geothermal energy is a clean alternative energy resource. Southern Ogan Komering Ulu (OKU), South Sumatera, is a geothermal prospect area because of the interaction between the Eurasian and Indo-Australian tectonic plates. It causes geological structures growth and the activity of volcanism in the area. Based on geological data, geothermal in southern OKU is indicated by the existence of 40–93 ºC temperature hot springs. Geological data based on remote sensing methods can determine the lineament. Geophysical data with gravity and magnetotelluric can identify the type of rock and the subsurface geological structure based on rock density and resistivity. Based on geological and gravity data indicates the presence of geological formations lead northwest-southeast, which is estimated as the geothermal fluid pathway with the suitability to the location of hot springs. The magnetotelluric data shows the geothermal reservoir rocks (clastic sedimentary rock) located at (-500)–(-2.500) meters depth with 30–200 Ωm resistivity. DOI: http://dx.doi.org/10.17977/um024v5i12020p022
Control of Air Pressurizer Levels on Pressurized Water Reactor (PWR) with Fractional Order PID Control System Rissa Damayanti; Abdul Halim; Syaiful Bakhri
JPSE (Journal of Physical Science and Engineering) Vol 5, No 2 (2020): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

The water level control system in the pressurizer is carried out for safety purposes when the PWR reactor is operating. Control is done by maintaining the water level in the pressurizer at a certain level. The height of the water level in the pressurizer will change according to the conditions of the nuclear reactor. This research aimed to obtain the best safety control system using the fractional order PID (FOPID) control system and prove that using the control system will provide better results than other existing system applications. In this research, the optimum gain control of FOPID is obtained with Kp equals 416.4, Ki equals 416.4, Kd equals 104.1, constitutes integral equals 0.15, and derivative order equals 1.9, which results in 324 times faster settling time and maximum overshoot 1.5 times lower when compared to conventional PID controllers combined with CMAC.DOI: http://dx.doi.org/10.17977/um024v5i22020p071
The Left-Right Symmetry Breaking Mechanism for the New Left-Right Symmetry Model Akmal Ferdiyan; Apriadi Salim Adam; Mirza Satriawan
JPSE (Journal of Physical Science and Engineering) Vol 5, No 1 (2020): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

We added a mechanism for breaking the left-right (LR) symmetry in the new variant of the left-right symmetry model. We added to the modela new scalar field ϕ that transforms oddly under the new LR transformation. The mechanism can provide different values for the vacuum expectation values of the left and right Higgs scalar, νL, and νR. A simple numerical analysis was performed to make sure that the parameters space in this model can satisfy some constraints of the model. It is shown that for some parameter values, this mechanism can fulfill the constraint of νL= 246 GeV and the ratio νR⁄νL >30. DOI: http://dx.doi.org/10.17977/um024v5i12020p001
Performance of Dye Sensitized Solar Cells (DSSCs) with ZnO Nanorod Electrode in Different Seed Solution Herlin Pujiarti; Nadiya Ayu Astarini; Markus Diantoro; Muhammad Safwan Aziz; Rachmat Hidayat
JPSE (Journal of Physical Science and Engineering) Vol 6, No 2 (2021): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Studies of comparing the performance of photoelectrode for dye-sensitized solar cells (DSSCs) continue to be carried out and developed. The ZnO nanorods as an electrode for DSSCs have been shown to have high electron collection due to the capability of electron photoexcitation and increased electron transport. Various methods of making ZnO nanorods have been studied and developed. However, the method requires controlled conditions under high temperature and pressure, thus limiting the commercialization of ZnO nanorods. Therefore, the seed solution-based hydrothermal method was chosen in the ZnO nanorod deposition process because it is an effective method, low-cost and easier fabrication process. The method of growing ZnO nanorod was carried out with three times of growing for 6 hours. ZnO nanorod was synthesized using different seed solutions, namely sample 1 and sample 2 by using methoxy and isopropanol, respectively. In this work, the SEM image shows the growth of ZnO nanorods vertically aligned on the FTO substrate and resulted in a smaller diameter for the isopropanol seed solution. The smaller diameter of the ZnO nanorod provides a larger surface area then increasing the total amount of dye attached to the ZnO nanorod and improve the photovoltaic performance.DOI:  10.17977/um024v6i22021p077
Reconstruction of Bandung Groundwater Basin Model Using Schlumberger Configuration Geoelectric Method Bayu Himawan; Rian Amukti; Friska Agustin; Mochamad Mussoddaq; Andika Artyanto
JPSE (Journal of Physical Science and Engineering) Vol 6, No 2 (2021): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Bandung is a city with rapid industrial development and a dense population. It causes the need for clean water to be huge, so it impacts groundwater extraction on a large scale. The Bandung Basin, which is a good reservoir for groundwater, will be disturbed if conservation and monitoring efforts are not carried out in the presence of groundwater. This study focuses on reconstructing the groundwater model in the Bandung Basin using the Schlumberger geoelectric method. After taking and analyzing the data, it was found that the resistivity value of the location of the presence of groundwater is depicted into three groundwater basins, namely the Bandung-Soreang groundwater basin, the Lembang groundwater basin, and the Batujajar groundwater basin. Unfettered aquifers, relatively aquitard in nature, are in the upper layer of the coal sandstone, claystone and sandstone units. The confined aquifer in the sand unit is under the sandy claystone layer.DOI: 10.17977/um024v6i22021p083
Trial of DC Submersible Pump 12 Volt 50 Watt with Solar Power and Relationship between Water Discharge and Storage Height Ahmad Swandi; Sri Rahmadhanningsih; Sparisoma Viridi; Inge Magdalena Sutjahja
JPSE (Journal of Physical Science and Engineering) Vol 6, No 2 (2021): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

One of the biggest problems for farmers in the dry season is the lack of water supply for irrigation. Currently, various types of pumps have been widely used, such as fuel pumps and pumps with PLN electricity. However, the costs required to operate these tools are pretty expensive. The solution to overcome this is using DC submersible pumps using solar panels as an energy source. The purposes of this study are to (1) determine the duration of operation of the DC submersible pump with the specifications of the battery and solar panels used, and (2) determine the productivity of the DC submersible pump in terms of the resulting discharge for various storage height conditions used. The research method used is an experimental research method using a quantitative approach. The results of this study are (1) DC submersible pump can operate for 240 minutes with 20 Ah battery at maximum voltage and uses 60 Wp solar panels, and (2) the height of the storage has an effect on the resulting discharge, there is a reduction in the resulting discharge every 0.5 meters increase in the height of the storage. Based on the analysis results, the maximum height limit for submersible pump push is 3.7 meters using a 3 per 4 inch hose. The results of this study can be a reference for farmers or users to determine the height of the water storage.DOI: 10.17977/um024v6i22021p061

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