doi:10.1080/1536383X.2020.1713762engDante, Roberto C.Martín Ramos, PabloChamorro Posada, PedroRutto, DarioVázquez Cabo, JoséDante, Denisse G.Barberis, RiccardoRubiños López, ÓscarSolar light-driven reduction of crystal violet by a composite of g-C3N4, beta-Ag2Se, gama-Fe2O3 and graphiteART-2020-116250In 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.2020http://zaguan.unizar.es/record/9847710.1080/1536383X.2020.1713762http://zaguan.unizar.es/record/98477oai:zaguan.unizar.es:98477FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES 28, 7 (2020), 533-540byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess