Abstract

Hematite coated PEG was synthesized by the sonication-calcination method. A variation of Na₂CO₃ is investigated to know the effect on structure and morphology. Characterization of samples are using X-ray fluorescence, X-ray diffraction, Scanning electron microscopy, and color reader techniques. XRF data showed that iron is the highest element in the precursor. The X-ray diffraction data confirm that Fe(OH)₃, α-FeOOH, and Fe₃O₄ established at the sonication stage are then transformed into the α-Fe₂O₃ phase after calcination. The X-ray diffraction data also was found that α-Fe₂O₃ at 0.5 M formed with the highest crystallinity degree. The scanning electron microscopy showed that the particle's shape is spherical, bar-shaped, and aggregate. However, the distribution of particles is not uniform and still displays agglomeration. The Color reader shows the highest degree of lightness obtained is at 1 M variation.

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