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Jurnal Fisika Unand
Published by Universitas Andalas
ISSN : 23028491     EISSN : 26862433     DOI : https://doi.org/10.25077/jfu
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Makalah yang dapat dipublikasikan dalam jurnal ini adalah makalah dalam bidang Fisika meliputi Fisika Atmosfir, Fisika Bumi, Fisika Intrumentasi, Fisika Material, Fisika Nuklir, Fisika Radiasi, Fisika Komputasi, Fisika Teori, Biofisika, ataupun bidang lain yang masih ada kaitannya dengan ilmu fisika.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 1,782 Documents
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Peningkatan Absorpsi Cahaya pada Nanostruktur TiO₂ Terdoping Cu dan Ni untuk Aplikasi Pemisahan Air Fotokatalitik Novianti, Noni; Ramona, Fransischa; Wellia, Diana Vanda; Muldarisnur, Mulda
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.635-643.2025

Abstract

This study reports the enhancement of light absorption by TiO₂ nanoparticles when doped with Ni and Cu nanoparticles. Numerical simulations were performed using the boundary element method. The absorbance in the visible region of Ni-doped TiO₂ increases compared to pure TiO₂. The increase in absorbance is accompanied by a shift in the absorption band edge to a longer wavelength (redshift) due to the formation of new energy levels that narrow the band gap. Cu-doped TiO₂ exhibits a more significant increase in absorbance and a wider absorption range. Both dopants decrease the band gap relative to pure TiO₂, with Cu doping producing a greater decrease. Ni and Cu doping enhance the optical response of TiO₂ in the visible region. Cu doping has the most dominant effect in broadening the absorption and lowering the band gap energy. These findings indicate that Ni- and Cu-based dopant engineering is a potential approach to improve the performance of TiO₂-based materials in photocatalytic applications such as hydrogen production by water splitting.
Aplikasi Metode Geolistrik Resistivitas untuk Menentukan Zona Lemah (Studi Kasus: Wilayah Episenter Gempabumi di Kecamatan Lalolae, Kabupaten Kolaka Timur) Triani, T.; Sudarwin Kamur; Erfina, Erfina
Jurnal Fisika Unand Vol 15 No 1 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.1.49-56.2026

Abstract

Research was conducted on the weak zones at the epicenter of the earthquake in Lalolae District, East Kolaka Regency, utilizing the Wenner 2D resistivity geophysical method. This study involved five measurement lines, each 150 meters in length, with a spacing of 10 meters between electrodes. The data analysis revealed that resistivity values across each line were heterogeneous, ranging from low to high resistivity at varying depths. Low resistivity (<100 Ωm), indicated in blue, corresponds to sandy alluvium resulting from the weathering of schistose rocks, which are classified as weak zones. Medium resistivity (>100 Ωm) is situated above the low resistivity layer and transitions into the high resistivity layer across each measurement traverse, identified as gneiss rock. High resistivity (>200 Ωm) extends along the measurement path at varying depths and is classified as quartzite rock.

Page 179 of 179 | Total Record : 1782

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