CD Tesis
Model Kinetika Pertumbuhan Kristal Magnetit (Fe3O4) Yang Disintesis Dengan Metode Kopresipitasi
Magnetite (Fe3O4) nanoparticles becomes a new innovation that gets attention of biomedical scientists. Magnetite can be applied to cancer treatment as a drug carrier because of its good biocompatibility and very low toxicity. 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 using Ostwald Ripening model, Avrami model, and Oriented Attachment model approach. Magnetite nanoparticles were synthesized from FeCl3, FeCl2 and NH4OH with co-precipitation method at 40, 60 and 80˚C for 1, 5, 10, 15, 20, 25 and 30 minutes.
Characterization by X-ray Diffraction (XRD) indicates that magnetite nanoparticles were formed in all temperature variations, i.e. 40, 60, and 80˚C. The particle diameter increases with the reaction time. Magnetite Crystallite diameter obtained in the range of 7-13 nm. Characterization by Scanning Electron Microscope (SEM) shows that magnetite nanoparticles have a fairly uniform size and agglomerated. Characterization by Brunauer Emmett Teller (BET) shows the pore surface area 86,145 m2/g and pore volume 0,025 cc/g. Beside that, the characterization by Particle Size Analyzer (PSA) shows the particle size distribution in the range of 400-600 nm. The growth of nanomagnetite crystals at 40˚C followed the Ostwald Ripening model. While the growth of magnetite crystals at temperatures of 60 and 80˚C fitted by Oriented Attachment model. And at temperatures of 40, 60 and 80 ° C also followed the Avrami model.
Key words: Magnetite, Co-precipitation, crystal growth, Ostwald Ripening, Avrami, Oriented Attachment
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