Comparative study of alcohols as sacrificial agents in H-2 production by heterogeneous photocatalysis using Pt/TiO2 catalysts

摘要

In this work, a TiO2 photocatalyst synthesized using a sol gel procedure (SG750) was Pt modified through photodeposition (SG750-2.1 wt%Pt) and tested for its efficiency in hydrogen production by heterogeneous photocatalysis in the presence of different alcohols as sacrificial agents. The tested alcohols were: methanol, ethanol, ethyleneglycol and glycerol. Production was continuously followed for 3.5 h. The concentration of each alcohol that resulted in the highest production was optimized and some of the degradation intermediates were identified and quantified in both gaseous and the remaining liquid phase at the end of the process.