Titania-coated gold nanorods with expanded photocatalytic response. Enzyme-like glucose oxidation under near-infrared illumination

Ortega-Liebana, M.C. (Universidad de Zaragoza) ; Hueso Martos, José Luis ; Arenal, R. (Universidad de Zaragoza) ; Santamaria, J. (Universidad de Zaragoza)

Resumen: Gold nanorods coated with a uniform titanium dioxide nanoshell have been prepared and used as glucose-oxidase surrogates. Remarkably, this core-shell photocatalytic nanostructure has been able to induce complete oxidation of glucose at near room temperature (32-34 °C) in a wide range of pH values with the aid of a near-infrared (NIR) irradiation source. In contrast, the uncoated gold nanorods exhibit negligible photo-oxidation response under identical experimental conditions thereby proving the photoactivity of the titania shell towards glucose oxidation. The process takes place via in situ photo-generation of singlet oxygen or hydroxyl radicals as reactive oxidative species (ROS). This underlines the role played by the core nanorods as plasmonic light harvesters in the NIR range and constitutes the first example of a NIR-activated enzyme-like catalyst.

Idioma: Inglés

DOI: 10.1039/c6nr06300d

Año: 2017

Publicado en: Nanoscale 9, 5 (2017), 1787-1792
ISSN: 2040-3364

Factor impacto JCR: 7.233 (2017)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 30 / 283 = 0.106 (2017) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 18 / 91 = 0.198 (2017) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 25 / 169 = 0.148 (2017) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 15 / 146 = 0.103 (2017) - Q1 - T1

Factor impacto SCIMAGO: 2.934 - Nanoscience and Nanotechnology (Q1) - Materials Science (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/H2020/642742/EU/Graphene-based nanomaterials for touchscreen technologies: Comprehension, Commerce and Communication/Enabling Excellence
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P

Tipo y forma: Congress (Published version)

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