J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (7): 619-624.

• Nanomaterials and Nanotechnology • Previous Articles     Next Articles

Hydrogen Production by Selective Photo-dissociation of Water in Aqueous Colloidal Nano-particles of Doped Iron (III) Oxides Semiconductors

Kasem K. Kasem   

  1. Natural Information and Mathematical Sciences Department, School of Art and Sciences, Indiana University Kokomo, Kokomo, IN 46904, USA
  • Received:2009-04-17 Revised:2009-11-12 Online:2010-07-31 Published:2010-07-26
  • Contact: Kasem KamelKasem
  • Supported by:

    Indiana University Summer Faculty Fellowship Program

Abstract:

Homogenous and heterogeneous production of hydrogen via photo-dissociation of water has been achieved with visible range solar radiation without any external potential at room temperature. Potassium ferrocyanide as a solvated-electron supplier and electron exchanger in basic buffers was used as a homogenous media for hydrogen production. Aqueous colloidal solutions of p-type Fe2O3 doped with MgO (Fe1:8Mg0:2O3) or with ZnO (Fe1:9Zn0:1O3) suspensions in ferrocyanide solutions were used as heterogeneous media for hydrogen generation by reduction of ferricyanide. The effects of the hole-scavengers such as oxo-anions and solvated-electron- suppliers were investigated. Results showed that Fe2O3 doped with ZnO was more efficient than that doped with MgO. The studies also showed that the aqueous nano-systems we used retained their stability as indicated by the reproducibility of their photocatalytic activities. Solar radiated assemblies of doped Fe2O3/[Fe(CN)6]4 sustained cyclic systems for continuous hydrogen production.

Key words: Hydrogen production, Photo-dissociation, Nanoparticles, Semiconductors