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Quantum yield of heterogeneous photocatalytic systems: Further application of an experimental method for determining the absorbed photon flow

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Abstract

The present paper reports additional results obtained with a method already proposed and used to measure absorbed and reflected photons during the occurrence of heterogeneous process carried out in the presence of a polycrystalline semiconductor solid suspended in aqueous solution. The limit of validity of the method is discussed and the influence of various parameters is reported. Moreover, the quantum yield for a probe photoreaction, i.e. 4-nitrophenol photo-oxidation carried out in aqueous suspensions containing various amounts of polycrystalline TiO2 (anatase) of different particle sizes, was determined by using monochromatic (λ=366 nm) or polychromatic light (λ=300–400 nm). The results indicated that the quantum yield was higher when light in the range 300–400 nm was used.

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Authors and Affiliations

  1. Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, University of Palermo, Viale delle Scienze, 90128, Palermo, Italy

    M. Schiavello, V. Augugliaro, V. Loddo & L. Palmisano

  2. Instituto de Catálisis y Petroleoquímica, CSIC, Campus de la Universidad Autónoma, Cantoblanco, 28049, Madrid, Spain

    M. J. López-Muñoz

Authors
  1. M. Schiavello
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  2. V. Augugliaro
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  3. V. Loddo
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  4. M. J. López-Muñoz
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  5. L. Palmisano
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Schiavello, M., Augugliaro, V., Loddo, V. et al. Quantum yield of heterogeneous photocatalytic systems: Further application of an experimental method for determining the absorbed photon flow. Res. Chem. Intermed. 25, 213–227 (1999). https://doi.org/10.1163/156856799X00310

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  • DOI: https://doi.org/10.1163/156856799X00310

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