Formation of iron oxide nanowires by using thermal oxidation of iron

Sa'ad, Nur Syafini (2015) Formation of iron oxide nanowires by using thermal oxidation of iron. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

An iron oxide nanowire is used widely in a range of applications, which include photocatalysis. Conventionally, iron oxide nanowires are produced by techniques such as; sol-gel process, template method, thermal decomposition, hydrothermal process However, these techniques are costly and complicated. Hence, this project serves to fabricate the iron oxide nanowires by using thermal oxidation of iron. Several parameters were investigated such as the effect of oxidation time, oxidation temperature and condition on the substrate. The morphologies and phases of Fe2O3 nanowires formed were characterized. FESEM observation showed that Fe2O3 nanowires structure was successfully formed on pure Fe foil. XRD and Raman spectroscopy confirmed variant phase: α- Fe2O3, FeO and Fe3O4 occurred after oxidizing while EDX was used to confirm that the nanowires consisted of oxygen and iron. Raman spectroscopy was used to support the morphologies and phases observed by SEM and XRD. The samples (oxidized at 180 min, 500C, in air without dropping sulphuric acid) were subjected to photodegradation testing under UV light conditions. The result obtain from this photodegradation shows that, as increase the time of methyl orange solution exposed to UV light, the solution is become fades. To ensure that the solution has changed color, UV visible analysis is used. Based on the results obtained, it can be concluded that the solution was effective degradation process when the time of exposure to light progressively increase.

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