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Study of the photocatalytic activity of Pt-modified commercial for hydrogen production in the presence of common organic sacrificial agents

Abstract:

A detailed study is undertaken of the photocatalytic activity in hydrogen production of the commercialphotocatalyst Kronos vlp7000 (KR) surface-modified with photodeposited platinum particles (2.1 wt%Pt). The influence of different photocatalytic variables is studied: photocatalyst loading, suspension pHvalue and the nature and concentration of the sacrificial agent used. Optimum pH was found to be neutralor slightly acidic. The catalyst loading, which ranged between 0.5 and 2 g L?1, had little effect on hydrogenproduction. In general, the results for the tested sacrificial agents in terms of hydrogen production wereas follows (in descending order):methanol > ethanol > ethylene glycol > glycerol. In studies of reuse thecommercial photocatalyst Kronos shows better perform in its photoactivity than the commercial photo-catalyst Aeroxide TiO2P25. Finally, studies were also undertaken of photoactivity under solar radiationin which promising results were obtained (5.5-18 mL h?1).