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Hydrogen evolution by water splitting using novel composite zeolite-based photocatalyst

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Title: Hydrogen evolution by water splitting using novel composite zeolite-based photocatalyst
Authors: Dubey, Nidhi1, Labhsetwar, Nitin K.1, Devotta, Sukumar1, Rayalu, Sadhana S. s_rayalu@neeri.res.in
Source: Catalysis Today. Dec2007, Vol. 129 Issue 3/4, p428-434. 7p.
Subjects: Photocatalysis, Cobalt catalysts, Zeolites, Hydrogen production
Abstract: Abstract: Novel zeolite-based material showing photocatalytic properties in the visible light have been synthesized by incorporating TiO2, heteropolyacid (HPA) and transition metal, namely cobalt. This material shows high efficiency for water splitting under visible light irradiation. Hydrogen generation to the tune of 2171μmol/h/g of TiO2 has been achieved for the composite photocatalyst synthesized as compared to H2 evolution rate to the tune of 131.6μmol/h/g of TiO2 for Degussa P25. This suggests that the TiO2 which gets effectively dispersed and stabilized on the surface of zeolite works synergistically with cobalt and heteropolyacid to make the material active in visible light for evolution of hydrogen from water. TiO2 is the photocatalyst, HPA functions as the dye sensitiser as well as redox system; zeolite functions as support matrix and as electron acceptor in synergy with cobalt. The probable mechanism for improved hydrogen evolution rate using such composite photocatalyst has been discussed. [Copyright &y& Elsevier]
Copyright of Catalysis Today is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 27640761
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  Data: Hydrogen evolution by water splitting using novel composite zeolite-based photocatalyst
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  Data: <searchLink fieldCode="AR" term="%22Dubey%2C+Nidhi%22">Dubey, Nidhi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Labhsetwar%2C+Nitin+K%2E%22">Labhsetwar, Nitin K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Devotta%2C+Sukumar%22">Devotta, Sukumar</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rayalu%2C+Sadhana+S%2E%22">Rayalu, Sadhana S.</searchLink><i> s_rayalu@neeri.res.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Catalysis+Today%22">Catalysis Today</searchLink>. Dec2007, Vol. 129 Issue 3/4, p428-434. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Cobalt+catalysts%22">Cobalt catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Zeolites%22">Zeolites</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink>
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  Data: Abstract: Novel zeolite-based material showing photocatalytic properties in the visible light have been synthesized by incorporating TiO2, heteropolyacid (HPA) and transition metal, namely cobalt. This material shows high efficiency for water splitting under visible light irradiation. Hydrogen generation to the tune of 2171μmol/h/g of TiO2 has been achieved for the composite photocatalyst synthesized as compared to H2 evolution rate to the tune of 131.6μmol/h/g of TiO2 for Degussa P25. This suggests that the TiO2 which gets effectively dispersed and stabilized on the surface of zeolite works synergistically with cobalt and heteropolyacid to make the material active in visible light for evolution of hydrogen from water. TiO2 is the photocatalyst, HPA functions as the dye sensitiser as well as redox system; zeolite functions as support matrix and as electron acceptor in synergy with cobalt. The probable mechanism for improved hydrogen evolution rate using such composite photocatalyst has been discussed. [Copyright &y& Elsevier]
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  Group: Ab
  Data: <i>Copyright of Catalysis Today is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.cattod.2006.09.041
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      – Code: eng
        Text: English
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        StartPage: 428
    Subjects:
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        Type: general
      – SubjectFull: Cobalt catalysts
        Type: general
      – SubjectFull: Zeolites
        Type: general
      – SubjectFull: Hydrogen production
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      – TitleFull: Hydrogen evolution by water splitting using novel composite zeolite-based photocatalyst
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            NameFull: Devotta, Sukumar
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              Text: Dec2007
              Type: published
              Y: 2007
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