Photocatalytic hydrogen generation using glycerol wastewater over Pt/TiO2

摘要

Using glycerol as electron donor, photocataly-tic hydrogen generation over Pt/TiO2 was investigated.The results show that glycerol can not only improve the efficiency of photocatalytic hydrogen generation but can also be decomposed effectively. The factors which affect photocatalytic hydrogen generation, such as irradiation time, initial concentration of the glycerol solution, pH-value of the suspensions and the coexisting substances were studied. The final oxidation products of glycerol were H2O and CO2. Glyceraldhyde, glycoladehyde, glycolic acid and formaldehyde were identified as the intermedi-ates. A possible reaction mechanism was discussed.