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Development of Fe/Ti02 Photocatalyst for Hydrogen Production from Water under Visible Light

Basar, Noor Hemiza (2010) Development of Fe/Ti02 Photocatalyst for Hydrogen Production from Water under Visible Light. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Solar energy is concerned in order to generate hydrogen (Hz) from water with the present of photocatalyst. The main problem is that current titanium dioxide (TiOz) photocatalyst is only active in the ultraviolet (UV) region. In order to harvest the abundance solar radiation consisting mainly of visible light, the efficiency of Ti02 has to be increased by shifted the absorption edge of Ti02 to the visible region. In order to increase the efficiency, the Ti02 photocatalyst is modified via metal doping method. The production of hydrogen over iron-doped titanium dioxide (Fe/TiOz) photocatalyst prepared by precipitation method has been studied. The iron (Fe) loading varied from 0.1 to 1.0 wt"lo with different calcination temperature at 300°C, 400°C and 500°C. The photocatalyst was characterized by Thermogravimetric Analysis (TGA), Diffuse Reflectance UV-Vis (DR UV-Vis), Fourier Transform Infrared (FTIR) Spectroscopy, X-ray Diffraction (XRD), and Field Emission Scanning Electron Microscopy (FE-SEM). The UV-vis absorption spectrum indicated that the absorption edge of the photocatalyst red-shifted to around 600 nm. The lowest reduction of band gap as a result of Fe doping was obtained at l.Owt% Fe/Ti02 calcined at 500°C (3.08 eV) compared to pure Ti02 (3.20 eV). Photocatalytic activity towards Hz generation from water was investigated using a multiport photocatalytic reactor by using halogen lamp that represented solar radiation. Under the irradiation with ultraviolet and visible light, the photocatalyst showed good performance for Hz production at 1,0 wt"/o of Fe loading calcined at 500°C with the production rate of 6.9 mL. The other characterizations of the photocatalyst were explained throughout this report.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Process System Engineering
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 12:24
Last Modified: 22 Oct 2013 12:24
URI: http://utpedia.utp.edu.my/id/eprint/9439

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