Journal of Materials Science

, Volume 44, Issue 11, pp 2890–2898 | Cite as

Photocatalysis for water oxidation by Fe2O3 nanoparticles embedded in clay compound: correlation between its polymorphs and their photocatalytic activities

  • Seiji Kakuta
  • Toshiyuki AbeEmail author


Iron oxide (Fe2O3) nanoparticles of distinct polymorphs (i.e., α and amorphous phases) were prepared in montmorillonite (MT) particularly with three types of methods (i.e., calcining, hydrothermal reaction, and hydrolysis) and used as photocatalysts for the oxidation of water to O2. Although α-Fe2O3 has usually been applied to a photocatalysis system [employing the saturated loading of α-Fe2O3 (25 wt%) in MT], this study first showed that amorphous Fe2O3 has similar photocatalysis ability to α-Fe2O3 in terms of water oxidation. Moreover, irrespective of the types of polymorphs, their photocatalyses were dependent on the loading amount of Fe2O3 in MT; that is, the O2 amount increased with the amount of the photocatalyst employed until the loading amount reached ca. 3 wt%, and decreased in the larger loading amount. In this article, the reason why such an optimal photocatalysis condition appears was considered in terms of kinetic aspects.


Fe2O3 Photocatalytic Activity Photocatalysis Water Oxidation Hydrous Ferric Oxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of Frontier Materials Chemistry, Graduate School of Science and TechnologyHirosaki UniversityHirosakiJapan
  2. 2.Aomori Industrial Research CenterAomoriJapan

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