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Publicação
Solar hydrogen production from aqueous solutions of ethanol at near ambient temperatures
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Orientador(es)
Resumo(s)
Nanostructured semi-conductor materials based on titanium dioxide, with effective photo-catalytic properties under UV illumination, were synthesized using sol-gel technology and characterized by X-Ray diffraction and scanning electron microscopy, with the objective of studying the photo-catalytic hydrogen production from water. The need to decrease the electron-hole recombination rate was accounted for by metal doping and the addition of ethanol as a hole trap. Aqueous suspensions of the semiconductor powders, with noble metal loadings (Pt) of 1.5 wt% were used and the effect of solution pH and temperature (20-70ºC) on hydrogen production were studied, for a selected catalyst concentration. Hydrogen production rates were found to be linear with solution temperature with values larger than published literature data.
Descrição
Palavras-chave
Photocatalytic material Hydrogen production Doped-titanium dioxide Ethanol
Contexto Educativo
Citação
Editora
EUROSUN 2008, 1st International Conference On Solar Heating, Cooling and Building