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Photochemical Reactivity of Iron(III)-Doped Ruthenium(II)-tris- Bipyridine/Titanium Dioxide Zeolite Y Photocatalysts at High Substrate Concentrations
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Megh Raj Pokhrel
Published/Copyright:
November 30, 2016
Abstract
Ruthenium(II)-tris-bipyridine/titanium dioxide codoped zeolite Y (Ru(bpy)32+/TiO2/Y) has been proven to be an efficient heterogeneous photocatalyst in Fenton-type oxidation reactions. However, these catalysts have exhibited low efficiency when high concentrations of aromatic amines (e.g. 2,4-xylidine) were treated. We have developed a mechanistic paradigm based on our photophysical studies (luminescence quenching of encapsulated Ru(bpy)32+by Fe3+ ) that accounts for this behavior. Our studies have demonstrated that the addition of small amounts of iron(III) can help to overcome the photocatalyst’s low efficiency.
Keywords: “Fenton-like” oxidation reactions; titanium dioxide nanoparticles; heterogeneous photocatalysis; AOP (Advanced Oxidation Procedures); zeolite Y-encapsulated ruthenium-trisbipyridine; DOC (dissolved organic carbon); solar photocatalysis
Received: 2008-3-15
Revised: 2008-5-15
Accepted: 2008-5-16
Published Online: 2016-11-30
Published in Print: 2008-7-1
© 2016 by Walter de Gruyter Berlin/Boston
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