Photocatalysis application of TiO₂ and Fe₂O₃ nanostructures

Tan, Boon Yee (2018) Photocatalysis application of TiO₂ and Fe₂O₃ nanostructures. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Photocatalysis applications have been studied extensively due to its excellent photocatalysis performance in environment remediation. The photocatalysis applications involves degradation of organic and inorganic pollutants, self-cleaning surfaces, anti-fogging surfaces, purification products and anti-bacterial applications. The aim of this study is to determine and quantify the photocatalytic efficiency of TiO2 and Fe2O3 based photocatalyst materials by using methyl orange (MO) degradation. RAMAN spectrometer, field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD) were employed to characterize TiO2 thin film, TiO2 powder, Fe2O3 thin film and Fe2O3 powder. FESEM images have shown the nanostructure of the samples. RAMAN and XRD have confirmed there are anatase and rutile phases exist in TiO2 samples while α-Fe2O3 phase is observed in Fe2O3 samples. The materials are then embedded into MO solution for photocatalytic testing. A few important factors or parameters such as distance between the light source and MO solution, time interval, and concentration of MO solution were being control. UV- Vis spectrometer was used to analyse the degradation result of MO solution. The data obtained from the UV-Vis analysis shows that at 10cm from the light, 5 hrs exposure time under UV light and 10ppm MO solution are giving the better efficiency of MO photodegradation. Based on the result obtained, a conclusion of TiO2 based photocatalyst has better photocatalytic performance in photocatalysis activity of MO solution than Fe2O3 based photocatalyst is made. At the same time, the photodegradation rate of material with powder form is more effective than thin film material.

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