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Assessment of Photocatalytic Hydrogen Production from Biomass or Wastewaters Depending on the Metal Co-Catalyst and Its Deposition Method on TiO2

  • Dades identificatives

    Identificador: imarina:5862191
    Autors:
    Imizcoz, MikelPuga, Alberto, V
    Resum:
    © 2019 by the authors. Licensee MDPI, Basel, Switzerland. A systematic study on the solar photocatalytic hydrogen production (photoreforming) performance of M/TiO2 (M = Au, Ag, Cu or Pt) using glucose as a model substrate, and further extended to lignocellulose hydrolysates and wastewaters, is herein presented. Three metal (M) co-catalyst loading methods were tested. Variation of the type of metal results in significantly dissimilar H2 production rates, albeit the loading method exerts an even greater effect in most cases. Deposition-precipitation (followed by hydrogenation) or photodeposition provided better results than classical impregnation (followed by calcination). Interestingly, copper as a co-catalyst performed satisfactorily as compared to Au, and slightly below Pt, thus representing a realistic inexpensive alternative to noble metals. Hydrolysates of either α-cellulose or rice husks, obtained under mild conditions (short thermal cycles at 160◦ C), were rich in saccharides and thus suitable as feedstocks. Nonetheless, the presence of inhibiting byproducts hindered H2 production. A novel photocatalytic UV pre-treatment method was successful to initially remove the most recalcitrant portion of these minor products along with H2 production (17 µmol gcat−1 h−1 on Cu/TiO2). After a short UV step, simulated sunlight photoreforming was orders of magnitude more efficient than without the pre-treatment. Hydrogen production was also directly tested on two different wastewater streams, that is, a municipal influent and samples from operations in a fruit juice producing plant, with remarkable results obtained for the latter (up to 115 µmol gcat−1 h−1 using Au/TiO2).
  • Altres:

    Autor segons l'article: Imizcoz, Mikel; Puga, Alberto, V
    Departament: Enginyeria Química
    e-ISSN: 2073-4344
    Autor/s de la URV: Puga Vaca, Alberto
    Paraules clau: Water Wastewaters Waste Solar Simultaneous degradation Rice husks Pt/tio2 suspensions Photocatalysis Nanoparticles Hydrogen Generation Evolution Ethanol Conversion Cellulose Biomass
    Resum: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. A systematic study on the solar photocatalytic hydrogen production (photoreforming) performance of M/TiO2 (M = Au, Ag, Cu or Pt) using glucose as a model substrate, and further extended to lignocellulose hydrolysates and wastewaters, is herein presented. Three metal (M) co-catalyst loading methods were tested. Variation of the type of metal results in significantly dissimilar H2 production rates, albeit the loading method exerts an even greater effect in most cases. Deposition-precipitation (followed by hydrogenation) or photodeposition provided better results than classical impregnation (followed by calcination). Interestingly, copper as a co-catalyst performed satisfactorily as compared to Au, and slightly below Pt, thus representing a realistic inexpensive alternative to noble metals. Hydrolysates of either α-cellulose or rice husks, obtained under mild conditions (short thermal cycles at 160◦ C), were rich in saccharides and thus suitable as feedstocks. Nonetheless, the presence of inhibiting byproducts hindered H2 production. A novel photocatalytic UV pre-treatment method was successful to initially remove the most recalcitrant portion of these minor products along with H2 production (17 µmol gcat−1 h−1 on Cu/TiO2). After a short UV step, simulated sunlight photoreforming was orders of magnitude more efficient than without the pre-treatment. Hydrogen production was also directly tested on two different wastewater streams, that is, a municipal influent and samples from operations in a fruit juice producing plant, with remarkable results obtained for the latter (up to 115 µmol gcat−1 h−1 using Au/TiO2).
    Àrees temàtiques: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20734344
    Adreça de correu electrònic de l'autor: alberto.puga@urv.cat
    Identificador de l'autor: 0000-0003-4201-2635
    Data d'alta del registre: 2024-10-26
    Volum de revista: 9
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2073-4344/9/7/584
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Catalysts. 9 (7): 584-
    Referència de l'ítem segons les normes APA: Imizcoz, Mikel; Puga, Alberto, V (2019). Assessment of Photocatalytic Hydrogen Production from Biomass or Wastewaters Depending on the Metal Co-Catalyst and Its Deposition Method on TiO2. Catalysts, 9(7), 584-. DOI: 10.3390/catal9070584
    DOI de l'article: 10.3390/catal9070584
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2019
    Pàgina inicial: 584
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Catalysis,Chemistry, Physical,Physical and Theoretical Chemistry
    Water
    Wastewaters
    Waste
    Solar
    Simultaneous degradation
    Rice husks
    Pt/tio2 suspensions
    Photocatalysis
    Nanoparticles
    Hydrogen
    Generation
    Evolution
    Ethanol
    Conversion
    Cellulose
    Biomass
    Química
    Physical and theoretical chemistry
    Farmacia
    Environmental science (all)
    Engenharias ii
    Ciências biológicas ii
    Chemistry, physical
    Catalysis
    Astronomia / física
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