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All Journal Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Science and Technology Indonesia Journal of Applied Geospatial Information Jurnal Penelitian Pendidikan IPA (JPPIPA) Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Hydrogen: Jurnal Kependidikan Kimia Journal of Technomaterial Physics Aceh International Journal of Science and Technology International Journal of Oil Palm
Martha Rianna
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Characterization of Barium Hexaferrite and Iron Sand as Microwave Absorbing Materials Naibaho, Yeni P.S; Humaidi, Syahrul; Rianna, Martha; Diana, Linda
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.11776

Abstract

This research aims to analyze the characteristics of Barium Hexaferite and iron sand as microwave absorbing materials, their influence on microwave absorption properties, and the frequency range of waves produced by these materials. The research method used is the Co-Precipitation method. Dissolve barium hexapherite and iron sand in distilled water with the appropriate mass ratio. The results of this study show that the synthesis of iron sand and barium hexapherite material produces a single phase material. The single phase material is shown through X-ray diffraction pattern data, namely iron sand and barium hexapherite, namely hematite and barium hexapherite. Iron sand and barium hexapherite materials are characterized using EDS which shows a composition that is close to stoichiometry. Observations using VNA show that iron sand and barium hexapherite materials are able to absorb electromagnetic waves at a radar wave frequency of 11.1 GHz, which is -25.64 dB.
Synthesis and Characterization of PVA-Enzyme/GA/PANI-HCl Indicator Membrane Electrodes; PANI-p-toluentsulfonic acid/PVC-KTpClPB-o-NPOE, SEM-EDX, XRD and FTIR Analysis Abd Hakim S; Martha Rianna; Jane Elnovreny
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.4918

Abstract

Research has been carried out on the indicator electrode PVA-Enzyme/GA-2.9%/PPy+Sulfonic Acid/PVC-KTpClPB-o-NPOE, the amorphous spectral pattern is greatly reduced for variations of the enzyme 0.6 g in 0.5 mL (50% water + 50% alcohol) . PVA-Enzyme/GA-2.9%/PPy+Sulfonic Acid/PVC-KTpClPB-o-NPOE indicator electrode, denoted As-1. Analysis of the linear curve of the As-1 sample with a sensitivity of 41.56 mV/decade, a detection range of 10-4 - 10-1 M and a detection limit of 10-4 M, R2 = 97.51 %. To increase the sensitivity, detection range, detection limit and confidence level of R2. Indicator electrodes were made with variations of the urease enzyme on PVA and o-NPOE variations on PVC-KTpClPB 61% and 66% and replacement of PANI conductive polymer. PANI conductive polymer was dissolved in hydrochloric acid HCl denoted PANI-HCl and p-toluensulfonic acid is denoted by PANI-p-toluensulfonic acid. SEM analysis shows that the morphology of S3 is greater than that of S2. Analysis of the cps/eV EDX voltage range is greater than S3 to S2. Analysis of the XRD intensity spectrum pattern on the 2theta diffraction angle is greater than S3 to S2. Likewise, the analysis of the %Transmittance FTIR spectrum pattern for wave numbers S3, S6, S8 is higher than S2. The best result according to material analysis is S3. 
Co-Authors Adi Rahwanto Amaturrahim, Suci Aisyah Anggito P. Tetuko, Anggito P. Diana, Linda Diana, Linda E. Eko Arief Setiadi, Eko Arief Felly, Putri Aldika Fitri Handayani Guk-Guk, Herwati Permata Indah Raja Habib Satria Hakim S, Abd Hamid, Muhammadin Hussain, Muhammad Khalid Indri Dayana Jane Elnovreny Maksi Ginting Nabila Agustin Naibaho, Yeni P. S. Naibaho, Yeni P.S Noverita Sprinse Vinolina Nurwijayanti Perdamean Sebayang Saragi, Indah Revita Siahaan, Chyntia Simanjuntak, Crystina Sitorus, Kurnia Jesiska Sufina Azzahra Sugianto ' Syahrul Humaidi, Syahrul Syahwin, Syahwin Talanda, Aknes Tambunan, Miranda Timbangen Sembiring Waruwu, Delima