TY - JOUR
T1 - Hydrogen production from glycerol photoreforming on TiO2/HKUST-1 composites
T2 - Effect of preparation method
AU - Martínez, Fabián M.
AU - Albiter, Elim
AU - Alfaro, Salvador
AU - Luna, Ana L.
AU - Colbeau-Justin, Christophe
AU - Barrera-Andrade, José M.
AU - Remita, Hynd
AU - Valenzuela, Miguel A.
N1 - Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2019/4
Y1 - 2019/4
N2 - 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.
AB - 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.
KW - Hydrogen production
KW - Photocatalysis
KW - Solar light
KW - TiO-HKUST-1 composites
UR - http://www.scopus.com/inward/record.url?scp=85065388155&partnerID=8YFLogxK
U2 - 10.3390/catal9040338
DO - 10.3390/catal9040338
M3 - Artículo
AN - SCOPUS:85065388155
SN - 2073-4344
VL - 9
JO - Catalysts
JF - Catalysts
IS - 4
M1 - 338
ER -
