Visible light active zeolite-based photocatalysts for hydrogen evolution from water

Hydrogen, considered as the fuel for future can be produced from non-conventional, renewable and plentiful source like water. Novel zeolite-based materials that show photocatalytic properties in the visible light have been synthesized by incorporating titanium dioxide (TiO 2), heteropolyacid (HPA) a...

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Bibliographic Details
Published in:	International journal of hydrogen energy Vol. 33; no. 21; pp. 5958 - 5966
Main Authors:	Dubey, Nidhi, Rayalu, Sadhana S., Labhsetwar, Nitin K., Devotta, Sukumar
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 01-11-2008 Elsevier
Subjects:	Alternative fuels. Production and utilization Applied sciences Cobalt Energy Exact sciences and technology Fuels Heteropolyacid Hydrogen Photocatalysis TiO 2 Water splitting Zeolite Heteropolyacid Water splitting Zeolite TiO 2 Cobalt Photocatalysis Platinum Chemical decomposition Transition metal Titanium oxide Hydrogen production Molecular sieve TiO2
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Summary:	Hydrogen, considered as the fuel for future can be produced from non-conventional, renewable and plentiful source like water. Novel zeolite-based materials that show photocatalytic properties in the visible light have been synthesized by incorporating titanium dioxide (TiO 2), heteropolyacid (HPA) and transition metals like cobalt (Co). These materials show high efficiency for water splitting under visible light irradiation. Hydrogen (H 2) generation to the tune of 2730 μmol/h/g TiO 2 has been obtained for the composite photocatalyst synthesized. Platinum (Pt) doping has also been attempted in this composite photocatalyst, however, no substantial enhancement in hydrogen generation was observed. The high efficiency of the composite photocatalyst suggests that the TiO 2 which gets effectively dispersed and stabilized on the surface of zeolite works synergistically with transition metal like cobalt and heteropolyacid to make the material active in visible light for photoreduction of water to hydrogen. The aluminosilicate framework of zeolite also contributes towards delayed charge separation. This composite photocatalyst shows improvement in hydrogen evolution rate over other TiO 2 based visibly active photocatalyst reported.
ISSN:	0360-3199 1879-3487
DOI:	10.1016/j.ijhydene.2008.05.095