Solar light-driven reduction of crystal violet by a composite of g-C3N4, beta-Ag2Se, gama-Fe2O3 and graphite

Dante, Roberto C. ; Martín Ramos, Pablo (Universidad de Zaragoza) ; Chamorro Posada, Pedro ; Rutto, Dario ; Vázquez Cabo, José ; Dante, Denisse G. ; Barberis, Riccardo ; Rubiños López, Óscar

Resumen: In this work, a new g-C3N4-based Z-scheme with ¿-Fe2O3 and ß-Ag2Se both n-type semiconductors, and graphite to favor electron exchange is presented. The composite material was studied by XRD, FTIR, UV-Vis, TEM, XPS, TGA, DSC and TOF-SIMS, and the ability of this photocatalytic system to act as a photo-reductant was assessed using crystal violet (CV+) dye. Solar light driven photo-reduction of CV+ in the presence of tri-sodium citrate evidenced a synergistic enhancement of the activity of the composite toward reduction, with ~20 times higher conversion rates per unit of surface area than those of g-C3N4. Photo-oxidation experiments under Xe lamp irradiation in the presence of H2O2 also showed that the AgFeCN composite featured a higher activity (~8×) than g-C3N4. This Z-scheme may deserve further study as a photo-reductant to obtain hydrogen or hydrogenated compounds. Moreover, the use of CV+ may represent a facile procedure that can aid in the selection of new photocatalysts to be used in hydrogen production.

Idioma: Inglés

DOI: 10.1080/1536383X.2020.1713762

Año: 2020

Publicado en: FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES 28, 7 (2020), 533-540
ISSN: 1536-383X

Factor impacto JCR: 1.869 (2020)

Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 26 / 37 = 0.703 (2020) - Q3 - T3
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 89 / 106 = 0.84 (2020) - Q4 - T3
Categ. JCR: CHEMISTRY, PHYSICAL rank: 134 / 162 = 0.827 (2020) - Q4 - T3
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 254 / 333 = 0.763 (2020) - Q4 - T3

Factor impacto SCIMAGO: 0.354 - Atomic and Molecular Physics, and Optics (Q3) - Materials Science (miscellaneous) (Q3) - Physical and Theoretical Chemistry (Q3) - Organic Chemistry (Q3) - Nanoscience and Nanotechnology (Q3)

Tipo y forma: Article (PostPrint)

Área (Departamento): Area Ingeniería Agroforestal (Dpto. CC.Agrar.y Medio Natural)