Synthesis of iron oxide nanoparticles via biopolymer method
Citation
Abdulkareem, O. A. (2021). Synthesis of iron oxide nanoparticles via biopolymer method, (Yayınlanmış yüksek lisans tezi). Altınbaş Üniversitesi, Lisansüstü Eğitim Enstitüsü, İstanbul.Abstract
Due to its properties like low cost and uncomplicated methods to produce, iron (III) alginate is
used to produce crystalline Fe2O3 nanoparticles. Iron (III) alginate gels were prepared and then
thermal decomposition technique is used to convert the gels into iron oxide nanoparticles. After
the synthesis, the effect of the annealing on the crystallite size was investigated. X-ray
diffractometry is used to characterize the produced powder. The size of iron oxide nanoparticles
changed relying on temperature and time, between 22 to 32 nm. The grain size distribution was
calculated using a numerical method, considering the full width at 1/5 and 4/5 of maximum
(FW1/5M) and (FW4/5M) of the XRD peaks. In order to observe the effect of annealing,
samples were annealed at two different temperatures, 600 and 800oC and at two different times 2
and 4 h. The results showed that the grain size distribution (GSD) became non-symmetrical
when the post-annealing applied with increasing temperature and time, and this method
considered has low effect on the width of distribution for powder produced under heat treatment.
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