Autor según el artículo: Imizcoz, Mikel; Puga, Alberto, V

Departamento: Enginyeria Química

e-ISSN: 2073-4344

Autor/es de la URV: Puga Vaca, Alberto

Palabras clave: Water Wastewaters Waste Solar Simultaneous degradation Rice husks Pt/tio2 suspensions Photocatalysis Nanoparticles Hydrogen Generation Evolution Ethanol Conversion Cellulose Biomass

Resumen: © 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).

Áreas temáticas: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 20734344

Direcció de correo del autor: alberto.puga@urv.cat

Identificador del autor: 0000-0003-4201-2635

Fecha de alta del registro: 2023-02-18

Volumen de revista: 9

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.mdpi.com/2073-4344/9/7/584

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Catalysts. 9 (7):

Referencia 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), -. DOI: 10.3390/catal9070584

DOI del artículo: 10.3390/catal9070584

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2019

Página inicial: 584

Tipo de publicación: Journal Publications