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Zeolitic Materials As Organizing Media For Semiconductor-Based Artificial Photosynthetic Systems

Published online by Cambridge University Press:  15 February 2011

Yeong Il Kim ,
Richard L. Riley ,
Munir J. Huq ,
Samer Salim ,
Angie N. Le  and
Thomas E. Mallouk
Yeong Il Kim
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
Richard L. Riley
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
Munir J. Huq
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
Samer Salim
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
Angie N. Le
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
Thomas E. Mallouk
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
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Abstract

Two photocatalytic systems consisting of spatially organized electron donor/photosensitizer/oxide semiconductor/catalyst assemblies are described. The first consists of an aluminosilicate zeolite (mordenite or zeolite L) containing Pt clusters, methylviologen, and titanium oxide within the linear channels, together with a size-excluded photosensitizer RuL32+ (L = 4, 4-dicarboxy-2, 2-bipyridine) adsorbed at the TiO2 surface. The kinetics of photochemical charge separation and hydrogen evolution in the presence of sacrificial electron donors are reported. In the second system, a layered oxide semiconductor, K4−xHxNb6O17·nH2O, replaces the zeolite/TiO2/MV2+ composite. Using adsorbed RuL3 and visible light excitation, this material decomposes acidic iodide solutions into H2 and I3− with a quantum efficiency of 0.3 %.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 233: Symposium U – Synthesis/Characterization and Novel Applications of Molecular Sieve Materials , 1991 , 145
Copyright
Copyright © Materials Research Society 1991

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References

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