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Penentuan Sifat Magnetik Dan Optik Partikel Oksida Besi Berbasis Pasir Pantai Sunur-Pariaman Didoping Cobalt

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Iron sand possesses unique magnetic properties, making it a promising material for various technological applications. This research aims to analyze the magnetic, optical, and compositional properties of iron oxide particles derived from Sunur-Pariaman beach sand, which were doped with cobalt. The material preparation process involved the ball milling method conducted in three stages, totaling 120 hours. Each stage utilized a strong NdFeB magnet to separate the iron oxide particles from non-magnetic particles. The final ball milling products were divided into four samples, each doped with cobalt at concentrations of 0, 5, 10, and 15 wt.%, labeled as BM4 0, BM4 5, BM4 10, and BM4 15. To analyze changes in the physical properties and composition resulting from this process, various characterization methods were employed, including Vibrating Sample Magnetometer (VSM), UV-Vis Spectrometry, and X-Ray Fluorescence (XRF). The VSM results indicated that the cobalt-doped iron oxide samples exhibited ferromagnetic properties, as characterized by clear hysteresis curves. Increased cobalt doping resulted in higher saturation magnetization (Ms) and remanent magnetization (Mr), which reflect the material's enhanced ability to retain magnetization. Coercivity (Hc) values also showed an increasing trend, from 301.64 Oe for undoped samples to 520.15 Oe for samples with 5% cobalt doping. However, at higher cobalt concentrations, coercivity slightly decreased, suggesting a saturation effect of doping on magnetic properties. The optical properties of the samples were evaluated using UV-Vis spectrometry, and the band gap values calculated with the Tauc equation showed a decreasing trend as cobalt doping increased. The lowest band gap of 1.80 eV was achieved with 5% cobalt doping, indicating that cobalt doping effectively reduced the band gap, potentially enhancing photocatalytic activity under visible light. XRF analysis showed changes in elemental composition. Before the ball milling process, Sunur-Pariaman beach sand contained 8.224% Fe and no Co. After ball milling and doping with 5% cobalt, the composition shifted to 7.19% Co and 72.275% Fe. These findings demonstrate that the ball milling method and cobalt doping effectively modify the magnetic and optical properties of iron oxide particles, enhancing the material's potential for advanced technological applications.
Keywords: Sunur-Pariaman beach sand, iron oxide particles, cobalt doping, ball milling

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2003110315

Penerbit

Pekanbaru : Universitas Riau FMIPA Fisika., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2003110315

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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