000150567 001__ 150567
000150567 005__ 20250210102458.0
000150567 0247_ $$2doi$$a10.3390/ma18020463
000150567 0248_ $$2sideral$$a142646
000150567 037__ $$aART-2025-142646
000150567 041__ $$aeng
000150567 100__ $$aAnsón-Casaos, Alejandro
000150567 245__ $$aHybrids of Deep HOMO Organic Cyanoacrylic Acid Dyes and Graphene Nanomaterials for Water Splitting Photoanodes
000150567 260__ $$c2025
000150567 5060_ $$aAccess copy available to the general public$$fUnrestricted
000150567 5203_ $$aDye-sensitization is a promising strategy to improve the light absorption and photoactivity abilities of wide-bandgap semiconductors, like TiO2. For effective water-splitting photoanodes with no sacrificial agents, the electrochemical potential of the dye must exceed the thermodynamic threshold needed for the oxygen evolution reaction. This study investigates two promising organic cyanoacrylic dyes, designed to meet that criterion by means of theoretical calculations. Both yellow-colored dyes were synthesized and characterized by optical and photoelectrochemical techniques, demonstrating strong light absorption in the visible region, suitable experimental reduction potentials, and adsorption from the organic solvent onto mesoporous TiO2 layers. In addition, to promote immobilization in aqueous electrolytes, the dyes were hybridized with graphene oxide or multi-walled carbon nanotubes. Photoelectrochemical analysis of the dye-sensitized photoelectrodes demonstrated efficient charge transfer from the dyes to the TiO2 photoanode under simulated solar light. While the starting photocurrent notably surpassed the blank TiO2, a subsequent decay points to kinetic obstacles that still need to be overcome.
000150567 536__ $$9info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S$$9info:eu-repo/grantAgreement/ES/DGA/E47-23R$$9info:eu-repo/grantAgreement/ES/DGA/T03-23R$$9info:eu-repo/grantAgreement/ES/MICINN/PID2022-139671OB-I00$$9info:eu-repo/grantAgreement/ES/UZ/UZ2023-CIE-01
000150567 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000150567 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000150567 700__ $$aBenito, Ana M.
000150567 700__ $$aMaser, Wolfgang K.
000150567 700__ $$0(orcid)0000-0003-3514-2570$$aOrduna, Jesús
000150567 700__ $$0(orcid)0000-0001-9814-0834$$aVillacampa, Belén$$uUniversidad de Zaragoza
000150567 700__ $$0(orcid)0000-0001-7193-1732$$aBlesa, María-Jesús$$uUniversidad de Zaragoza
000150567 7102_ $$12013$$2765$$aUniversidad de Zaragoza$$bDpto. Química Orgánica$$cÁrea Química Orgánica
000150567 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000150567 773__ $$g18, 2 (2025), 463 [9 pp.]$$pMaterials (Basel)$$tMaterials$$x1996-1944
000150567 8564_ $$s1520427$$uhttps://zaguan.unizar.es/record/150567/files/texto_completo.pdf$$yVersión publicada
000150567 8564_ $$s2626173$$uhttps://zaguan.unizar.es/record/150567/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000150567 909CO $$ooai:zaguan.unizar.es:150567$$particulos$$pdriver
000150567 951__ $$a2025-02-10-08:28:26
000150567 980__ $$aARTICLE