Luminescent mesoporous nanorods as photocatalytic enzyme-like peroxidase surrogates

Ortega-Liebana, M.Carmen (Universidad de Zaragoza) ; Hueso, Jose L. ; Fernandez-Pacheco, Rodrigo (Universidad de Zaragoza) ; Irusta, Silvia (Universidad de Zaragoza) ; Santamaria, Jesus (Universidad de Zaragoza)

Resumen: Herein we report on a novel inorganic peroxidase-mimicking nanocatalyst activated under blue LED photoirradiation. A novel flash-pyrolysis method has been developed for the generation of strong blue photoluminescence (PL) centers attributed to silicon and carbon-based sites within a mesoporous SBA-15 silica nanorod platform. The type of centers and their PL response can be controlled by varying the flash thermal treatment conditions. By tailoring the operating conditions the system can be driven towards the preferential generation of carbon-based luminescent centers, with or without the simultaneous generation of silicon-based centers. The properties and the nature of these luminescent centers within the mesoporous nanorods have been thoroughly corroborated by a battery of characterization techniques including fluorescence spectroscopy, X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) at the local level of the structures combined with scanning transmission electron microscopy (STEM) imaging. In addition, these luminescent mesoporous nanorods have been successfully tested as robust photocatalysts able to display peroxidase-like activity and indirect glucose sensing in a wider range of pH conditions compared to the natural enzyme, especially when carbogenic dots and oxygen-deficient silica centers are simultaneously present in the structure.

Idioma: Inglés

DOI: 10.1039/c8sc03112f

Año: 2018

Publicado en: CHEMICAL SCIENCE 9, 40 (2018), 7766-7778
ISSN: 2041-6520

Factor impacto JCR: 9.556 (2018)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 19 / 172 = 0.11 (2018) - Q1 - T1

Factor impacto SCIMAGO: 3.895 - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/EUR/ERC/HECTOR-267626
Financiación: info:eu-repo/grantAgreement/EC/FP7/294094/EU/Synthesis and characterization of NANOstructured materials with LumInescent properties for diaGnostic and tHerapeuTic applications/NANOLIGHT
Financiación: info:eu-repo/grantAgreement/EC/H2020/742684/EU/Catalytic Dual-Function Devices Against Cancer/CADENCE

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)