Porous Photocatalytic Nanotitania (T102) Thin Films For Environmental Self-Cleaning Applications

Zainab , Mahamud (2010) Porous Photocatalytic Nanotitania (T102) Thin Films For Environmental Self-Cleaning Applications. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Titanium dioxide photocatalysis is one of the most promising mechanisms for absolute mineralization of organic pollutants. This research, deals with the modification of the sol gel process for the synthesis of the porous TiO₂-PEG thin films with good structural integrity for water treatment. Relatively by adding the PEG, it can influence the formation of TiO2 films structure and adhesion. Then, high porosity induced by the combination effect of the template such as the PEG with titania sol can be beneficial to the maximum exposure of the nanocrystallites. Moreover, the formation of TiO2 associated with larger pores will accelerate the mass transfer of the treated contaminants in the larger pore channels. For the mesoporous TiO₂ thin films prepared by a PEG 300, PEG 400 and PEG 600 through the sol gel method, porous structure and larger film thickness will be obtained. The advantages of the unique structures of the as-prepared TiO₂ films in the application of environmental self-cleaning systems are extensively studied. In this research, details information on the preparation method, synthesis route and its mechanism, crystallographic and structural properties, and photocatalytic activity of the nanocrystalline TiO₂ particles with thermal stability will be investigated. Due to this research, five characteristic techniques applied for the characteristic the photocatalytic coating of TiO2 thin films such as X-ray Diffraction (XRD), Atomic Force Microscoe (AFM), Transmission Electron Microscopy (TEM) and Brunner- Emmet-Teller (BET) surface area. Adhesion of TiO2 thin films become smooth and better surface while increasing the coating layers. Besides that, the films structure of TiO2 thin films produced high anatase peak while increase the coating layer over the five layers coating and the increasing the PEG molecular weight. From the other view, this research will provide the investigation of new nanotechnology product development of high efficient photocatalytic TiO₂ particles films that will be used in the self cleaning and disinfection application.

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