Vol 6, No 4 (2015) > Chemical Engineering >

Photocatalytic Hydrogen Production from Glycerol-water over Metal Loaded and Non-metal Doped Titanium Oxide

Slamet Slamet, Eny Kusrini, Agus Salim Afrozi, Muhammad Ibadurrohman

 

Abstract:

Modifications of the TiO2 P25 photocatalyst with metals: Platinum (Pt), Copper (Cu) and
non-metal: Nitrogen (N) doping
to produce Hydrogen (H2) from a glycerol-water
mixture have been investigated. The metals (Pt and Cu) were loaded into Titanium Dioxide (TiO2 ) surface by employing an impregnation and
Photo-Assisted Deposition
(PAD) method, respectively. As prepared the metal
doped TiO2 photocatalyst was then dispersed into an ammonia solution to obtain N-doped photocatalysts. The
modified photocatalysts were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS). XRD patterns indicated that the modified TiO2 photocatalysts have a nano-size crystallite range of 16-23 nm, while the DRS analysis showed that
the doping of both metal and non-metal into TiO2 photocatalysts could effectively shift photon
absorption to the visible light region. The optimum
Cu loading of Cu-N-TiO2 was found to be 5%, resulting in a 10 times higher H2
production improvement level when compared to unloaded TiO2, even though this is still considered to be inferior
compared to
that of a 1% Pt loading, which results in a 34
times higher level than an unmodified TiO2photocatalyst. The effect of glycerol concentrations on hydrogen
production has also been studied. This method offers a
promising technology to find renewable and clean
energy by
using cheap materials and a simple technology.

Keywords: Glycerol; Hydrogen production; Nanocomposite; Photocatalyst; TiO2

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