000165878 001__ 165878
000165878 005__ 20260115140311.0
000165878 0247_ $$2doi$$a10.3390/suschem6040031
000165878 0248_ $$2sideral$$a147430
000165878 037__ $$aART-2025-147430
000165878 041__ $$aeng
000165878 100__ $$aViale, Fabrizio E.
000165878 245__ $$aDesigning a Photocatalyst: Relationship Between Surface Species and Specific Production of Desired ROS
000165878 260__ $$c2025
000165878 5060_ $$aAccess copy available to the general public$$fUnrestricted
000165878 5203_ $$aBimetallic mesoporous photocatalysts were synthesized via a wet impregnation method using SBA-15 as a support, and characterized by UV–visible diffuse reflectance spectroscopy, low-angle X-ray diffraction and N2 physisorption. Among the tested materials, the Ti/Mn combination exhibited the highest photocatalytic activity in azo dye degradation. To understand this enhanced performance, catalysts with varying Mn loads and calcination ramps were evaluated. Additionally, experiments with radical scavengers (isopropanol, chloroform) and under N2 insufflation were conducted to identify the active radical species. Catalysts prepared with low Mn content and higher calcination ramps showed the greatest activity, which significantly decreased with isopropanol, indicating hydroxyl radicals as the main reactive species. In contrast, samples with higher Mn content and quicker heating displayed reduced activity in the presence of chloroform, suggesting superoxide radical involvement. Spectroscopic analyses (XPS, UV–Vis DRS) revealed that increasing Mn load promotes the formation of Mn2+ over Mn4+ species and lowers the band gap energy. These findings highlight the direct correlation between synthesis parameters, surface composition and optical properties, providing a strategy for fine-tuning the performance of a photocatalyst.
000165878 536__ $$9info:eu-repo/grantAgreement/EC/H2020/101007629 /EU/Nanomaterials for Enzymatic Control of Oxidative Stress Toxicity and Free Radical Generation/NESTOR$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 101007629 -NESTOR
000165878 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000165878 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000165878 700__ $$aElías, Verónica R.
000165878 700__ $$aBenzaquén, Tamara B.
000165878 700__ $$0(orcid)0000-0003-1558-9279$$aGoya, Gerardo F.$$uUniversidad de Zaragoza
000165878 700__ $$aEimer, Griselda A.
000165878 700__ $$aFerrero, Gabriel O.
000165878 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000165878 773__ $$g6, 31 (2025), 1-28$$tSustainable chemistry
000165878 8564_ $$s2022205$$uhttps://zaguan.unizar.es/record/165878/files/texto_completo.pdf$$yVersión publicada
000165878 8564_ $$s2538873$$uhttps://zaguan.unizar.es/record/165878/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000165878 909CO $$ooai:zaguan.unizar.es:165878$$particulos$$pdriver
000165878 951__ $$a2026-01-15-12:37:10
000165878 980__ $$aARTICLE