JPSE (Journal of Physical Science and Engineering)最新文献

{"title":"Type of Mineral Deposits on Alteration Rocks using Petrography, X-Ray Fluorescence (XRF), and X-Ray Diffraction (XRD) Method in Geothermal Prospect in Tiouw Village, Maluku","authors":"R. Lokollo, J. R. Kelibulin","doi":"10.17977/um024v4i22019p037","DOIUrl":"https://doi.org/10.17977/um024v4i22019p037","url":null,"abstract":"Indonesia is a country with abundant geothermal energy potential. One of the locations that have potential geothermal energy sources is Tiouw Village, Saparua, Central Maluku. This study was conducted on the types of mineral deposits using the petrographic method, X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF). Based on the results of petrographic analysis and XRD, rock samples 1, 2, and 3 of Tiouw include andesite igneous rocks with propylitic alteration type. While sample 4 is dacite igneous rock with argillic alteration type. Each rock sample has a mineral set of kaolinite, chlorite, quartz, cristobalite, epidote, and plagioclase. The XRF results showed the highest chemical composition of SiO 2 , followed by Al 2 O 3 and K 2 O. This mineral content can indicate the subsurface temperature of the geothermal field in the range of 200–300 oC with varying salinity, pH close to neutral, and low permeability. This interpreted that the type of mineral deposits in Tiouw Village was high sulfidation epithermal deposits. DOI: http://dx.doi.org/10.17977/um024v4i22019p037","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121864653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Karakteristik Transfer Muatan pada DSSC dengan Fotoanoda Triple Layer Ag-TiO2","authors":"Titik Istirohah, Shahan Shah, Nur Amirah Mat Nor, Thathit Suprayogi, Markus Diantoro, Arif Hidayat, Ahmad Taufiq, Z. A. I. Supardi, Abdul Kariem Arof","doi":"10.17977/um024v4i12019p023","DOIUrl":"https://doi.org/10.17977/um024v4i12019p023","url":null,"abstract":"Dye Sensitized Solar Cell (DSSC) merupakan salah satu bagian dari energi terbarukan yang memiliki potensi besar dengan memanfaatkan energi dari sinar matahari menjadi energi listrik dengan bantuan sensitizer sebagai agen penyerap cahaya. Kemampuan konversi DSSC ditunjukkan oleh nilai Jsc (12,70 mA/cm 2 ), Voc (0,585 V), FF (0,476), dan η (3,54%) yang diperoleh dari pengujian solar simulator . Selain parameter tersebut, karakteristik DSSC dapat juga ditunjukkan dari nilai t tr (0,010 s), t rec (0,080 s), η cc (0,874), D (0,192) dan  L D  (0,124 mm) melalui IMPS ( Intensity Modulated Photocurrent Spectroscopy ) dan IMVS ( Intensity Modulated Photovoltage Spectroscopy ). Pada artikel ini juga dilaporkan Impedansi antar lapisan DSSC melalui analisis EIS ( Electrochemical Impedance Spectroscopy ). DOI: http://dx.doi.org/10.17977/um024v4i12019p023","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124883902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Nanoporous Semiconductor Film Thickness Effect on Short Circuit Current Density of β-Carotene Dye based DSSC: Theoretical and Experimental Approach","authors":"S. Solehudin, M. Diantoro, A. Hidayat","doi":"10.17977/um024v4i12019p001","DOIUrl":"https://doi.org/10.17977/um024v4i12019p001","url":null,"abstract":"Dye-sensitized solar cells (DSSC) made of TiO 2 have received increasing attention since O’Regan and Gratzel published their work in Nature in 1991 [1]. Some studies have been conducted to determine the effect of the TiO 2 electrode thickness on the DSSC performance. Nevertheless, the effect of the electrode thickness on the J–V characteristics, especially the short circuit current density ( J sc ), has not been adequately addressed. Therefore, in this investigation, parametric analyses were conducted to study the DSSC electrode thickness effect on J sc . Diffusion model was used to derive the equation of nanoporous semiconductor film thickness ( d ) dependence on J sc . TiO 2 paste was prepared using same method as Ref. [2]. The cells I-V curve were characterized using a computerized digital multi-meter (Keithley 2400) with a variable load. The cells short circuit current ( J sc ) data gotten from the I-V characterization were plotted as the function of the thickness of TiO 2 films. The result of the data plot was then compared and fitted with the theoretical modelling result. It is apparent that the DSSC performance largely depends on the TiO2 film thickness. The results was also showed that the diffusion model provided good approximation to describe the dependence of J sc on the film thickness of DSSC. DOI: http://dx.doi.org/10.17977/um024v4i12019p001","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123743896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Electronic Structure pada ZnO Nanoparticles Menggunakan Ionization Energy-Tight Binding Model","authors":"Y. Hardianto, A. Taufiq, A. Hidayat, S. Sunaryono, H. N. Ulya","doi":"10.17977/UM024V3I22018P038","DOIUrl":"https://doi.org/10.17977/UM024V3I22018P038","url":null,"abstract":"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","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123044165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sintesis Ferrat sebagai Pendegradasi Senyawa Turunan Benzena","authors":"Dian Majid, Aditya Rio Prabowo,, Muhammad Al Kholif, S. Sugito","doi":"10.17977/UM024V3I22018P070","DOIUrl":"https://doi.org/10.17977/UM024V3I22018P070","url":null,"abstract":"Penelitian ini dilakukan dengan tujuan untuk mensintesis kalium ferrat (K 2 FeO 4 ) 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 FeSO 4 .9H 2 O, FeCl 2 .9H 2 O, Fe(NO 3 ) 2 .9H 2 O, dan NaFeO 2 . 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 NaFeO 2 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.","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128559082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Suseptibilitas Magnetik dan Kelimpahan Mineral Magnetik pada Tanah Sawah di Lawang dan Soekarno-Hatta, Malang","authors":"N. Y. Daryanti, S. Zulaikah, N. Mufti, D. Haryati","doi":"10.17977/UM024V3I22018P048","DOIUrl":"https://doi.org/10.17977/UM024V3I22018P048","url":null,"abstract":"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 χ lf 0,885 – 7,703 ×(10 -6 m 3 kg -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","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"89 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120930075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengaruh Fraksi Nano (TiO2:SnO2) terhadap Struktur dan Efisiensi DSSC TiO2:SnO2/β-Karoten/FTO","authors":"Muhammad Zaini, S. Maryam, Suci Elya Intan Suryani, Siti Wihdatul Himmah, Z. Nurdiana, Solehudin Solehudin, Thatit Suprayogi, S. Sunaryono, Markus Diantoro","doi":"10.17977/UM024V3I22018P063","DOIUrl":"https://doi.org/10.17977/UM024V3I22018P063","url":null,"abstract":"Penggunaan energi terbarukan berbasis energi matahari banyak dikembangkan dalam beberapa tahun terakhir berupa solar sel khususnya dalam bentuk DSSC. Semikonduktor SnO 2 memiliki band gap yang paling besar yaitu 3,6 eV dan TiO 2 dalam bentuk anatase dan rutil memiliki nilai 3,2 dan 3,0 eV. SnO 2 dan TiO 2 memiliki beberapa kemiripan pada sifat elektronik dan struktural. Pada penelitian ini, pembentukan komposit TiO 2 /SnO 2 dilakukan dengan menggunakan variasi Wt% massa TiO 2 100, 97, 94, 88  dan 85%. Metode dalam sintesis menggunakan kopresipitasi untuk TiO 2 dan solgel untuk SnO 2 . Karaktersisasi XRD menunjukkan nano partikel TiO 2 dengan struktur anatase dengan ukuran butir 8,89 nm dan nano partikel SnO 2 28 nm. Pada variasi massa, efisiensi meningkat dengan bertambahnya massa TiO 2 . Nilai efisiensi maksimum yang dihasilkan pada 100 % TiO 2 yaitu 0,18 %. DOI: http://dx.doi.org/10.17977/um024v3i22018p063","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"14 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114032934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Struktur dan Sifat Mekanik Film Bacterial Cellulose dengan Disintegrasi Mekanis","authors":"Muhamad Muhajir, Heru Suryanto, Aisyah Larasati","doi":"10.17977/UM024V3I22018P055","DOIUrl":"https://doi.org/10.17977/UM024V3I22018P055","url":null,"abstract":"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. Struktur film sangat berpengaruh terhadap sifat mekanik dari Bacterial Cellulose (BC). Upaya merekayasa struktur Bacterial Cellulose Fiber s (BCF) adalah dengan mengubah ukuran dan distribusi serat BC melalui proses  disintegrator  mekanis menggunakan High Speed Blender (HSB). Penelitian ini bertujuan untuk mengetahui pengaruh disintegrasi terhadap struktur dan sifat mekanis film BCF. Metode yang digunakan dalam penelitian ini adalah sintesis BCF dari fermentasi limbah kulit nanas dengan inkubasi bakteri Acetobacter xylinum ( A. x ylinum ) selama 14 hari. Serat BC direndam dengan NaOH 1% selama 24 jam kemudian dihaluskan dengan HSB kode variasi kecepatan L (18000 rpm), M (21000 rpm), dan H (26000 rpm) selama 5 menit. Film dibentuk dengan metode casting dan dikeringkan menggunakan oven pada suhu 60 °C selama 8 jam. Hasil penelitian menunjukkan morfologi BCF menjadi berpori dengan kristalinitasnya menurun sehingga kekuatan tarik film juga menurun sebesar 94%. Hasil penelitian ini diharapkan memberikan informasi rekayasa struktur BCF berpotensi untuk filter dan maupun untuk sensor.","PeriodicalId":265940,"journal":{"name":"JPSE (Journal of Physical Science and Engineering)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124034361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}