Hydrogen Production from Glycerol Photoreforming on TiO2/HKUST-1 Composites: Effect of Preparation Method
| Autor: | Christophe Colbeau-Justin, Ana Laura Luna, Miguel A. Valenzuela, José M. Barrera-Andrade, Elim Albiter, Hynd Remita, Salvador Alfaro, Fabián M. Martínez |
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| Přispěvatelé: | Universidad de Buenos Aires [Buenos Aires] (UBA), Laboratoire de Chimie Physique D'Orsay (LCPO), Université Paris-Sud - Paris 11 (UP11)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Departamento de Industrias, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform hydrogen production Infrared spectroscopy 02 engineering and technology 010402 general chemistry lcsh:Chemical technology 7. Clean energy 01 natural sciences Catalysis solar light lcsh:Chemistry Electron transfer [CHIM]Chemical Sciences TiO2-HKUST-1 composites lcsh:TP1-1185 Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Composite material ComputingMilieux_MISCELLANEOUS Hydrogen production [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology 0104 chemical sciences Photoexcitation lcsh:QD1-999 Photocatalysis Charge carrier [CHIM.OTHE]Chemical Sciences/Other 0210 nano-technology photocatalysis |
| Zdroj: | Catalysts, Vol 9, Iss 4, p 338 (2019) Catalysts Catalysts, MDPI, 2019, 9 (4), pp.338. ⟨10.3390/catal9040338⟩ Volume 9 Issue 4 |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal9040338⟩ |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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