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Catalysts 2019, 9(4), 338;

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

Laboratorio de Catálisis y Materiales, ESIQIE-Instituto Politécnico Nacional, México City 07738, Mexico
Laboratoire de Chimie Physique, CNRS UMR 8000 Université Paris-Sud, 91405 Orsay, France
Author to whom correspondence should be addressed.
Received: 12 March 2019 / Revised: 28 March 2019 / Accepted: 31 March 2019 / Published: 4 April 2019
(This article belongs to the Special Issue Emerging Trends in TiO2 Photocatalysis and Applications)
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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. View Full-Text
Keywords: hydrogen production; photocatalysis; TiO2-HKUST-1 composites; solar light hydrogen production; photocatalysis; TiO2-HKUST-1 composites; solar light

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Martínez, F.M.; Albiter, E.; Alfaro, S.; Luna, A.L.; Colbeau-Justin, C.; Barrera-Andrade, J.M.; Remita, H.; Valenzuela, M.A. Hydrogen Production from Glycerol Photoreforming on TiO2/HKUST-1 Composites: Effect of Preparation Method. Catalysts 2019, 9, 338.

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