Garuda - Garba Rujukan Digital

PENGEMBANGAN PRAKTIKUM FISIKA MATERI HUKUM KEKEKALAN MOMENTUM MENGGUNAKAN APLIKASI VIDEO TRACKER Khotijah, Khotijah; Arsini, Arsini; Anggita, Sheilla Rully
Physics Education Research Journal Vol 1, No 1 (2019)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

This study aims to determine the feasibility and the effectiveness of using a video tracker application for practicum of physics 1 on momentum conservation. This is included in research and development type. Stages carried out in this study include: 1) define, is done by giving questionnaires and interviews, 2) design, includes media selection, format selection and produce the initial product design, 3) development, includes product development and material expert validation assessment, media experts and linguists and limited field testing. The validation test results obtained that the media is feasible to use with a percentage of 88% based on material experts with very good categories, 85% based on media experts with very good categories, and 78% based on linguists with good categories. The effectiveness of media is shown by high average value of the experimental class of 84,06 compared to the control class of 70,97. Student responses to the use of products are categorized very well with a percentage of 89%.

Effect of Molarity on Double Layer Photocatalytic Activity ZnO/ZnO:Ag for Metanil Yellow Degradation Anggita, Sheilla Rully; Kusuma, Hamdan Hadi; Sumarti, Heni; Teke, Sosiawati
Physics Education Research Journal Vol 5, No 1 (2023)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2023.5.1.13301

Double layer (DL) ZnO/ZnO:Ag has been synthesized with variations in molarity of 0.1, 0.3, 0.5, and 0.7 M and its application as a degrading agent for methanil yellow dye. This study aims to determine the effect of the molarity of the DL ZnO/ZnO:Ag on crystallinity and photocatalytic activity for methanil yellow degradation. DL ZnO/ZnO:Ag was synthesized using sol-gel technique and deposited with spray coating technique. The results of DL ZnO/ZnO:Ag were characterized by XRD to determine the crystallinity and particle size. The photocatalytic activity was carried out by immersing the DL ZnO/ZnO:Ag layer in 10 ppm methanil yellow solution and irradiating it with UV light for 4 hours and then tested using UV-Vis spectroscopy to get the percentage of methanil yellow degradation. The results showed that the crystallinity of the DL ZnO/ZnO:Ag for all molarity variations had a hexagonal wurtzite structure. Grains size increase as molarity increases from 0.1 to 0.5 M. However, if the concentration continues to be increased to 0.7M, the grain size decreases. Photocatalytic activity is increasing every hour, as indicated by the increasing percentage of degradation. Precursor in 0.5 M has the maximum percentage of degradation is 25.32%.

Morphological, Crystallinity, and Functional Group Analysis of Coconut Shell-Based Activated Carbon with Carbonization Temperature Variations for Supercapacitor Electrode Potential Anggita, Sheilla Rully; Prahesti, Arinda Yukashima Putri; Azizah, Tasya Salsabila; Arsini, Arsini
Journal of Physics and Its Applications Vol 7, No 3 (2025): August 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i3.25118

Supercapacitors are advanced energy storage devices with high power density and rapid charge–discharge capabilities. This study explores the potential of coconut shell–based activated carbon as an electrode material for supercapacitors. Coconut shell carbon powder was carbonized at temperatures ranging from 400°C to 700°C and chemically activated using 3M KOH for 24 hours. The activated carbon was then filtered, rinsed with distilled water until neutral pH, and dried at 120°C for 4 hours. Characterization was performed using Scanning Electron Microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR). SEM images confirmed the formation of uniformly distributed pores, with higher carbonization temperatures leading to increased pore development. BET analysis showed that both surface area and pore volume increased with rising carbonization temperatures. XRD patterns revealed amorphous graphite-like carbon structures, with improved crystallinity at higher temperatures. FTIR spectra confirmed the presence of aromatic C=C and C–O functional groups. These results demonstrate that activated carbon derived from coconut shells exhibits favorable physicochemical properties, indicating strong potential as a low-cost and sustainable electrode material for supercapacitor applications.

Effect of Molarity on Double Layer Photocatalytic Activity ZnO/ZnO:Ag for Metanil Yellow Degradation Anggita, Sheilla Rully; Kusuma, Hamdan Hadi; Sumarti, Heni; Teke, Sosiawati
Physics Education Research Journal Vol. 5 No. 1 (2023)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2023.5.1.13301

Double layer (DL) ZnO/ZnO:Ag has been synthesized with variations in molarity of 0.1, 0.3, 0.5, and 0.7 M and its application as a degrading agent for methanil yellow dye. This study aims to determine the effect of the molarity of the DL ZnO/ZnO:Ag on crystallinity and photocatalytic activity for methanil yellow degradation. DL ZnO/ZnO:Ag was synthesized using sol-gel technique and deposited with spray coating technique. The results of DL ZnO/ZnO:Ag were characterized by XRD to determine the crystallinity and particle size. The photocatalytic activity was carried out by immersing the DL ZnO/ZnO:Ag layer in 10 ppm methanil yellow solution and irradiating it with UV light for 4 hours and then tested using UV-Vis spectroscopy to get the percentage of methanil yellow degradation. The results showed that the crystallinity of the DL ZnO/ZnO:Ag for all molarity variations had a hexagonal wurtzite structure. Grains size increase as molarity increases from 0.1 to 0.5 M. However, if the concentration continues to be increased to 0.7M, the grain size decreases. Photocatalytic activity is increasing every hour, as indicated by the increasing percentage of degradation. Precursor in 0.5 M has the maximum percentage of degradation is 25.32%.

Title

Found 4 Documents
Search

Abstract

Abstract

Abstract

Abstract

Title Search

Found 4 Documents Search

Abstract

Abstract

Abstract

Abstract

Title

Found 4 Documents
Search