Photocatalytic hydrogen generation using glycerol wastewater over Pt/TiO₂

Abstract

Using glycerol as electron donor, photocatalytic 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 intermediates. A possible reaction mechanism was discussed.

Keywords

photocatalysis / hydrogen generation / glycerol / degradation

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Acknowledgements

The financial support of Department of Sciences and Technology of China (2003CB214503), the National Natural Science Foundation of China (Grant No. 20763006), and the Natural Science Foundation of the Jiangxi Province (No. 2007GZH1754) are gratefully acknowledged.

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg