Ruthenium Tris-bypyridine/Zeolite-Y/Titanium Dioxide Nano-Assembly: ‘Ship-in-a-Bottle’ Synthesis and Application in Heterogeneous Photodegradation of 2,4-xylidine

  • Leon M. PayawanJr.
  • Eva Marie Ratilla
  • Stefan Bossmann

The synthetic route followed in the encapsulation of [Ru(bpy)32+ in ZeoliteY is referred to as “ ship-in-a-bottle ” synthesis due to non-extractability of the [Ru(bpy)3]2+ complex, once encapsulation has taken place within the cages of the zeolite Y. Nanoparticles of TiO2 was then introduced through TiCl3 in ethylene glycol mixture under argon, with sintering at 200 ° C. Spectroscopic, surface, and electrochemical characterization confirmed the presence of [Ru(bpy)3]2+ complex within the cages of zeolite Y, and nanoparticles of TiO 2 in its cages.

The amount of TiO2 was varied, and the assembly was tested for its photocata-lytic activity using degradation of 2,4-xylidine as test reaction probe. The decrease in the concentration of xylidine and the corresponding increase in oxalate concentration were monitored through HPLC. A pseudo-first order kinetics was observed in the photodegradation process based on the Langmuir-Hinshelwood mechanism. An inverse correlation was observed between the kinetic rate constant and the obtained Light-Induced Optoacoustic Spectroscopy (LIOAS) frequency maxima.

Enhanced rate of photodegradation observed with the use of new and efficient photocatalyst such as [Ru(bpy)3]2+TiO2 co-doped Zeolite Y may pave the way for development of large-scale advanced oxidation processes for other pollutant system.

Keywords

Photodegradation Ruthenium tris-bypyridine Synthesis Titanium Dioxide 2,4-xylidine Zeolite-Y 

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References

  1. 1.
    Bossmann, S.H., Turro, C., Schnabel, C., Pokhrel, M.R., Payawan, L.M. Jr.Baumeister, B. and Woerner, M., 2001, J. Phys. Chem. B., 105, 5374–5382CrossRefGoogle Scholar
  2. 2.
    Bossmann, S.H., Jockusch, S., Schwarz, P., Baumeisters, B., Gob, S., Schnabel, C., Payawan, L M. Jr.Pokhrel, M.R., Worner, M., Baraun, A.M. and Turro, N.J., 2003, Photochem. Photobiol. Sci., 2, 477PubMedCrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media B.V 2009

Authors and Affiliations

  • Leon M. PayawanJr.
    • 1
  • Eva Marie Ratilla
    • 1
  • Stefan Bossmann
    • 2
  1. 1.Institute of ChemistryUniversity of the PhilippinesDilimanPhilippines
  2. 2.Lehrstuhl für UmweltmesstechnikUniversität KarlsruheKarlsruheGermany

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