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Kinetika Pertumbuhan Kristal Nanomagnetit (Fe3o4) Dengan Pendekatan Model Ostwald Ripening

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Magnetite (Fe3O4) nanoparticles is a magnetic nanomaterial that have potential properties to be applied as drug delivery. The purpose of this study was to determine the influence of time and temperature synthesis of magnetite characteristics and determine its crystal growth kinetics model with Ostwald ripening model approach. Magnetite nanoparticles synthesized from FeCl3, citrate, urea and polyethylene glycol with hydrothermal method at 180, 200 and 220˚C for 1,3,5,7,9 and 12 hours. Characterization by X-ray Diffraction (XRD) indicates that magnetite formed at temperatures of 200 and 220˚C. However, at temperature of 180˚C, hematite (Fe2O3) was the only product. The longer the reaction time, increasing the size of the particle radius. Magnetite Crystallite diameter obtained was 10-29 nm. Characterization by Transmission Electron Microscope (TEM) shows that magnetite nanoparticles have uniform size and non-agglomerated. Core-shell-shaped particles formed at 200˚C and 220˚C for 3 hours synthesis. Irregular shape obtained at 220˚C for 12 hour synthesis with particle diameter about 120 nm. Characterization by Vibrating Sample Magnetometer (VSM) shows that magnetite has superparamagnetism behavior with the highest saturation magnetization (Ms) was 70.27 emu/g. magnetite crystal growth data at temperature of 200˚C can’t be fitted by Ostwald ripening model. While crystal growth data at temperatures of 220˚C can be fitted by Ostwald ripening growth model with growth controlled by the dissolution of surface reaction (n≈4) with the percent error of 2.53%.

Keywords: Nanoparticles, Magnetite, Hydrothermal, crystal growth, Ostwald ripening

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 05 217 (0005)

Penerbit

Pekanbaru : UNIVERSITAS RIAU- PASCASARJANA - KIMIA., 2017

Deskripsi Fisik

xi, 77 hlm.;ill.;29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 05 217 (0005)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

PASCASARJANA (MAGISTER) KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Hanum

Versi lain/terkait

Lampiran Berkas

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