Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/266169
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Role of β-CD macromolecule anchored to α-Fe2O3/TiO2 on the selectivity and partial oxidation of guaiacol to add-value products |
Otros títulos: | Enhancement of selective photocatalytic conversion of guaiacol to add-value products by β-cyclodextrin macromolecules anchored to α-Fe2O3/TiO2 | Autor: | Espinoza-Villalobos, Nicole; Rojas, Susana; Salazar, Ricardo Andrés; Contreras, David; Escalona, Néstor; Vergara, Elizabeth; Laguna-Bercero, M. A. CSIC ORCID ; Mendizabal, Fernando; Barrientos, Lorena | Fecha de publicación: | 2021 | Editor: | American Chemical Society | Citación: | ACS Sustainable Chemistry and Engineering 9(34): 11427-11438 (2021) | Resumen: | Biomass is a naturally abundant, sustainable, and clean resource, which has the potential to replace fossil feedstock for sustainable production of high add-value chemicals. However, an efficient conversion process is still difficult to achieve due to the difficult reaction conditions. In this study as a novel and versatile concept, we introduced the use of β-cyclodextrin (β-CD) macromolecule to enhance the photocatalytic behavior of a α-Fe2O3/TiO2 heterojunction. The selective conversion of guaiacol was evaluated using 0.2, 1.0, and 2.0 molar ratios of β-CD anchored on 0.7 wt % α-Fe2O3/TiO2 under mild reaction conditions. 1.0 molar ratio of β-CD promoted photo-oxidation of guaiacol to mainly produce p-benzoquinone with ∼68% selectivity at ∼10% conversion. To understand this effect, Electron Paramagnetic Resonance Spectroscopy (EPR) in operando mode and Diffuse Reflectance Spectroscopy (DRS) experiments were performed. The results showed that the 1.0 molar ratio of β-CD decreases the bandgap from 3.06 to 2.76 eV and controls the •OH radical concentration due to the formation of a covalent bond between β-CD and semiconductors. The improved guaiacol adsorption capacity on the photocatalyst resulted in the enhancement of the photochemical activity and selectivity. Additionally, a possible pathway of guaiacol transformation was proposed through the oxidation intermediates. Furthermore, the photocatalyst β-CD/α-Fe2O3/TiO2 can be recycled efficiently and reused three times, without loss in reactivity. | Versión del editor: | https://doi.org/10.1021/acssuschemeng.1c03528 | URI: | http://hdl.handle.net/10261/266169 | DOI: | 10.1021/acssuschemeng.1c03528 | E-ISSN: | 2168-0485 |
Aparece en las colecciones: | (INMA) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
68 INMAenhan.pdf | 726,23 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
5
checked on 29-abr-2024
WEB OF SCIENCETM
Citations
3
checked on 26-feb-2024
Page view(s)
35
checked on 02-may-2024
Download(s)
50
checked on 02-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.