Article Dans Une Revue Catalysts Année : 2019

Hydrogen Production from Glycerol Photoreforming on TiO2/HKUST-1 Composites: Effect of Preparation Method

Fabián Martínez
  • Fonction : Auteur
Elim Albiter
  • Fonction : Auteur
Salvador Alfaro
  • Fonction : Auteur
Christophe Colbeau-Justin
José Barrera-Andrade
  • Fonction : Auteur
Hynd Remita
Miguel Valenzuela

Résumé

Coupling metal-organic frameworks (MOFs) with inorganic semiconductors has been successfully tested in a variety of photocatalytic reactions. In this work we present the synthesis of TiO2/HKUST-1 composites by grinding, solvothermal, and chemical methods, using different TiO2 loadings. These composites were used as photocatalysts for hydrogen production by the photoreforming of a glycerol-water mixture under simulated solar light. Several characterization techniques were employed, including X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), infrared spectroscopy (FTIR), and time-resolved microwave conductivity (TRMC). A synergetic effect was observed with all TiO2/HKUST-1 composites (mass ratio TiO2/MOF 1:1), which presented higher photocatalytic activity than that of individual components. These results were explained in terms of an inhibition of the charge carrier (hole-electron) recombination reaction after photoexcitation, favoring the electron transfer from TiO2 to the MOF and creating reversible Cu1+/Cu0 entities useful for hydrogen production.

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hal-04294341 , version 1 (04-03-2025)

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Fabián Martínez, Elim Albiter, Salvador Alfaro, Ana Luna, Christophe Colbeau-Justin, et al.. Hydrogen Production from Glycerol Photoreforming on TiO2/HKUST-1 Composites: Effect of Preparation Method. Catalysts, 2019, 9 (4), pp.338. ⟨10.3390/catal9040338⟩. ⟨hal-04294341⟩
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