2024-03-28T19:59:22Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/497622021-12-05T19:30:52Zcom_10324_1191com_10324_931com_10324_894col_10324_1379
Solar light-driven reduction of crystal violet by a composite of g-C3N4, β-Ag2Se, γ-Fe2O3 and graphite
Dante, Roberto C.
Martín Ramos, Pablo
Chamorro Posada, Pedro
Rutto, Dario
Vázquez Cabo, José
Dante, Denisse G.
Barberis, Riccardo
Rubiños López, Óscar
In this work, a new g-C3N4-based Z-scheme with γ-Fe2O3 and β-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.
2021-11-06T18:15:13Z
2021-11-06T18:15:13Z
2021-11-06T18:15:13Z
2020
info:eu-repo/semantics/article
Fullerenes, Nanotubes and Carbon Nanostructures, 2020, vol. 28 , p. 533-540.
1536-383X
https://uvadoc.uva.es/handle/10324/49762
10.1080/1536383X.2020.1713762
533
7
540
Fullerenes, Nanotubes and Carbon Nanostructures
28
1536-4046
spa
https://www.tandfonline.com/doi/abs/10.1080/1536383X.2020.1713762?journalCode=lfnn20
info:eu-repo/semantics/openAccess
Taylor & Francis