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- Title
Hydrogen Production from Glycerol Photoreforming on TiO2/HKUST-1 Composites: Effect of Preparation Method.
- Authors
Martínez, Fabián M.; Albiter, Elim; Alfaro, Salvador; Luna, Ana L.; Colbeau-Justin, Christophe; Barrera-Andrade, José M.; Remita, Hynd; Valenzuela, Miguel A.
- Abstract
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.
- Subjects
HYDROGEN production; REFLECTANCE spectroscopy; INFRARED spectroscopy; CHARGE exchange; CHARGE carriers
- Publication
Catalysts (2073-4344), 2019, Vol 9, Issue 4, p338
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal9040338