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JPSE (Journal of Physical Science and Engineering)
ISSN : 25412485     EISSN : 25412485     DOI : -
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).
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Articles 57 Documents
Struktur dan Sifat Mekanik Film Bacterial Cellulose dengan Disintegrasi Mekanis Muhajir, Muhamad; Suryanto, Heru; Larasati, Aisyah
JPSE (Journal of Physical Science and Engineering) Vol 3, No 2 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Film structure was greatly affected to mechanical properties of Bacterial Cellulose (BC). An engineering effort on Bacterial Cellulose Fibers (BCF) structure was changing the size and distribution of BC fiber through mechanical disintegrator process using a High Speed Blender (HSB). This study aimed to show the effect of disintegrator to the structure and mechanical properties of BCF film. The method used in this study is a synthesis of BCF from fermentation from pineapple peel waste with incubation of Acetobacter xylinum (A. xylinum) for 14 days. BC pellicle was soaked by using 1% NaOH for 24 hours then distrusted using the HSB with code speed variation of L (18000 rpm), M (21000 rpm), and H (26000 rpm) for 5 min. Then film formed by a casting method and dried in the oven at a temperature of 60 °C for 8 hours. The study result showed that the morphology of BCF formed pores, the crystallinity decreased so the tensile strength was decreased by 94%. The results of this study are expected to provide engineering information on the BCF structure potentially for filters and for sensors. DOI: http://dx.doi.org/10.17977/um024v3i22018p055 
The Virtual Lock-in Amplifiers - Accuracy of Measurement Results in Light Transmission Experiments Prastika, Lintang Ratri; Indarti, Lili; Hendro, Hendro
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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This research focuses on the analysis of the measurement result of the virtual lock-in amplifier (virtual-LIA) in the light transmission experiment as the trial step of developing the virtual-LIA. The virtual-LIA used in this research is designed by using the Vernier sensor DAQ as the data acquisition and the LabVIEW as the programming media. The design of virtual-LIA is based on the mathematical operations of LIA. The type of virtual-LIA is a single phase with the capabilities to process the external reference signal. Light transmission experiments are carried out using formazin polymer suspension with turbidity level of 3000 NTU, 3500 NTU, and 4000 NTU as the medium in which light is passed. The accuracy of the measurement results is known by comparing the results of virtual-LIA with real-LIA SR510. The experiments are also carried out in bright and darkroom conditions to determine the ability of virtual-LIA in reducing noise signals. Based on the experiment, the results obtained that the measurement accuracy of the virtual-LIA developed is above 94% compared to the LIA SR510. Virtual-LIA could measure small signals with and without noise with the average percentage of differences measured between dark and bright conditions is 0.54%.DOI: 10.17977/um024v6i12021p001
Pengaruh Fraksi Nano (TiO2:SnO2) terhadap Struktur dan Efisiensi DSSC TiO2:SnO2/β-Karoten/FTO Zaini, Muhammad Baqir; Maryam, Siti; Suryani, S E I; Himmah, S W; Nurdiana, Z; Solehudin, Solehudin; Suprayogi, Thatit; Sunaryono, Sunaryono; Diantoro, Markus
JPSE (Journal of Physical Science and Engineering) Vol 3, No 2 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Penggunaan energi terbarukan berbasis energi matahari banyak dikembangkan dalam beberapa tahun terakhir berupa solar sel khususnya dalam bentuk DSSC. Semikonduktor SnO2 memiliki band gap yang paling besar yaitu 3,6 eV dan TiO2 dalam bentuk anatase dan rutil memiliki nilai 3,2 dan 3,0 eV. SnO2 dan TiO2 memiliki beberapa kemiripan pada sifat elektronik dan struktural. Pada penelitian ini, pembentukan komposit TiO2/SnO2 dilakukan dengan menggunakan variasi Wt% massa TiO2 100, 97, 94, 88  dan 85%. Metode dalam sintesis menggunakan kopresipitasi untuk TiO2 dan solgel untuk SnO2. Karaktersisasi XRD menunjukkan nano partikel TiO2 dengan struktur anatase dengan ukuran butir 8,89 nm dan nano partikel SnO2 28 nm. Pada variasi massa, efisiensi meningkat dengan bertambahnya massa TiO2. Nilai efisiensi maksimum yang dihasilkan pada 100 % TiO2 yaitu 0,18 %. DOI: http://dx.doi.org/10.17977/um024v3i22018p063
Sintesis Ferrat sebagai Pendegradasi Senyawa Turunan Benzena Majid, Dian; Prabowo, Aditya Rio; Al Kholif, Muhammad; Sugito, Sugito
JPSE (Journal of Physical Science and Engineering) Vol 3, No 2 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Penelitian ini dilakukan dengan tujuan untuk mensintesis kalium ferrat (K2FeO4) dengan menggunakan berbagai sumber Fe dan diaplikasikan pada pendegradasian senyawa turunan benzene seperti klorobenzena, bromobenzena dan toluene. Pada penelitian ini telah berhasil mensintesis dengan mengunakan 4 sumber Fe yang berbeda diantaranya FeSO4.9H2O, FeCl2.9H2O, Fe(NO3)2.9H2O, dan NaFeO2. Masing masing kristal kalium ferrat hasil sintesis berwarna hitam keunguan. Pada analisa menggunakan spektrofotometer UV-Vis, ferrate memiliki panjang gelombang pada 510nm. Sintesis kalium ferrat menggunakan NaFeO2 memiliki tingkat kemurnian yang paling tinggi. Pada hasil uji degradasi, efisiensi tertinggi didapatkan pada degradasi toluene sebesar 53% hanya dalam 10 menit waktu reaksi. Hal ini menunjukan bahwa kalium ferrat merupakan bahan alternatif yang menjajikan dalam pengolahan air maupun limbah industri. DOI: http://dx.doi.org/10.17977/um024v3i22018p070
Suseptibilitas Magnetik dan Kelimpahan Mineral Magnetik pada Tanah Sawah di Lawang dan Soekarno-Hatta, Malang Daryanti, Nurainin Yuli; Zulaikah, Siti; Mufti, Nandang; Haryati, D S
JPSE (Journal of Physical Science and Engineering) Vol 3, No 2 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Tanah sawah merupakan tanah khas antropogenik yang memiliki peran penting di seluruh dunia, tidak terkecuali di Indonesia. Seiring perkembangan pembangunan dan perkotaan tanah sawah menjadi beralih fungsi sehingga tercipta lingkungan sawah yang berada dekat dengan aktivitas manusia seperti industri. Upaya dalam memahami keadaan lingkungan seperti itu dapat dilakukan dengan agromagnetisme yaitu memahami sifat mineral magnetik yang terkandung dalam tanah pertanian atau perkebunan. Sifat magnetik sering digunakan sebagai indikator pencemaran dan perkembangan tanah, terutama untuk identifikasi oksida besi tanah dan sifatnya. Untuk memenuhi upaya tersebut dilakukanlah penelitian sifat mineral magnetik tanah sawah di Lawang dan Sokearno Hatta, Malang. Hasil penelitian diperoleh rentang nilai χlf 0,885 – 7,703 ×(10-6m3kg-1). Unsur yang mendominasi pada tanah sawah diantaranya Fe, Si, Al, Ca dengan nilai terendah ada pada Ca sebesar 4,5% dan yang tertinggi adalah unsur Fe sebesar 45,52%. DOI: http://dx.doi.org/10.17977/um024v3i22018p048
Kajian Electronic Structure pada ZnO Nanoparticles Menggunakan Ionization Energy-Tight Binding Model Hardianto, Yuda Prima; Taufiq, Ahmad; Hidayat, Arif; Sunaryono, Sunaryono; Ulya, H N
JPSE (Journal of Physical Science and Engineering) Vol 3, No 2 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Zinc oxide (ZnO) nanoparticles have been investigated intensively related to their applications such as in optical band gap energy for semiconductor application. In general, the characterization of band gap energy of the ZnO nanoparticles has been carried out using UV-Vis spectroscopy. In this work, ionization energy-tight binding model was developed to analyze the optical binding energy of the ZnO nanoparticles. The primary technique of the electronic structure calculation was an analytical calculation of overlap integral of 2p orbital from O and 3d orbital from Zn. The result of the calculation presents that the maximum bandgap energy of ZnO particles is about of 4.4 eV. This result is almost similar to band gap energy of the ZnO nanoparticles showing by experimental result. DOI: http://dx.doi.org/10.17977/um024v3i22018p038
A Study on Phase and Microstructure of Reduced Graphene Oxide Prepared by Heating Corncobs Mas'udah, Kusuma Wardhani; Taufiq, Ahmad; 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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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
Integrasi Pengembangan Techno Park dan Mitigasi Bencana Daerah Volcano Hosted Geothermal Cangar, Arjuno-Welirang Berbasis Metode Seismik Maryanto, Sukir
JPSE (Journal of Physical Science and Engineering) Vol 3, No 1 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Abstract

Telah dilakukan integrasi konsep pengembangan Techno Park dan Mitigasi Bencana pada kawasan Volcano Hosted Geothermal dengan berdasar pada metode seismik. Pada tahap awal dilakukan survey mikroseismik dengan analisis pergerakan partikel. Tujuannya untuk mengetahui sebaran episenter dan hiposenter gempa bumi mikro yang berubah secara spatio- temporal dan sebaran nilai Peak Ground Acceleration (PGA) yang dihitung menggunakan metode Kanai. Akuisisi data dilakukan di dua lokasi (Tretes dan Cangar) tempat pengembangan Techno Park dan observatorium Gunungapi dan Geothermal menggunakan seismograf TDL-303S dan juga dikembangkan homemade seismometer berbasis MEMS. Hasil penelitian didapatkan rentang frekuensi gempa bumi mikro berkisar 12-24 Hz. Terdiri atas 34 event tersebar di sekitar Daerah Cangar dengan rentang kedalaman 4-262 meter, serta 6 event di sekitar Kawah Welirang dengan rentang kedalaman 985-2152 meter. Sumber event di sekitar kawah diduga sebagai akibat aktivitas vulkanik Kawah Welirang. Nilai Sebaran nilai PGA di Daerah Cangar berkisar 11,23 gal hingga 21,8 gal. Sedangkan, di Daerah Tretes berkisar 5,93 gal hingga 18,87 gal. Rentang nilai tersebut menunjukkan tingkat risiko akibat gempa tektonik pada daerah penelitian termasuk kategori aman, sehingga layak untuk pengembangan daerah monitoring erupsi gunungapi Arjuno WelirangDOI: http://dx.doi.org/10.17977/um024v3i12018p025 
Identifikasi Sistem Panas Bumi Daerah Cangar, Jawa Timur menggunakan Metode Magnetotelurik Rahmawati, Rahmawati; Maryanto, Sukir; Susilo, Adi
JPSE (Journal of Physical Science and Engineering) Vol 2, No 2 (2017): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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The research has been done in Cangar area of complex Mt.Arjuno-Welirang, East Java.  This research using magnetotelluric method. The purpose of this research is to identify the geothermal system of research area based on its resistivity value. Acquisition of magnetotelluric data done in 11 point with spaces 70 meters up to 150 meters. Magnetotelluric measurement points is divided into 5 profile. Based on the result of data processing given range resisitivity value in research area between 4 W.m up to 2000 W.m.  The result of modeling geothermal system in Cangar indicated of caprock (≤21 W.m), reservoir (21 W.m – 167 W.m) and a heat source (≥167 W.m). Geothermal Cangar is controlled by Cangar fault.
UJI POTENSIODINAMIK MATERIAL PELAPIS ANTI- KOROSI: Acrylic Paint-PANi/SiO2 Munasir, Munasir; Umah, H; Syahra, D M T
JPSE (Journal of Physical Science and Engineering) Vol 1, No 1 (2016): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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Polyaniline (PANi) was succesfully prepared from Ammonium Peroxodisulfate (APS) and anyline using chemical oxidation method. Silica (SiO2) was synthesized from natural sands taken from Banjar. PANi/SiO2 composites were prepared using mechanical mixing route. The composites were prepared by variating the weight compositions of PANi:SiO2 of 2.5%, and 5% for SiO2. Furthermore, the coating process of Paint-PANi/SiO2 on SS304 stainless stell by spray coating technique. The characterization of anticorrosive behaviour of Paint-PANi/SiO2 was tested by potentiodynamics method. The obtained Tafel curve was then analyzed by means of ANOVA method. The best anticorrosive performance refered to the sample of Paint-PANi/(5%)SiO2, both of before and after exposure processes. The corrotion rate of before and after exposure processes were 0,00896000 mpy and 0,00024408, respectively. DOI: http://dx.doi.org/10.17977/um024v1i12016p025