Anisotropic Au-ZnO photocatalyst for the visible-light expanded oxidation of n-hexane

Bueno-Alejo, C.J. ; Graus, J. ; Arenal, R. ; Lafuente, M. ; Bottega-Pergher, B. ; Hueso, J.L.

Resumen: In this work we present a novel metal-semiconductor heterostructure that contains triangular and prism-shaped plasmonic gold nanostructures directly synthesized and assembled onto ZnO nanostructures. Spatially-resolved (SR) high-resolution electron energy loss spectroscopy (EELS) at the local (sub-nanometer scale) level confirmed the field enhancement of the local electromagnetic fields in the surroundings of the triangular and prism-shaped Au nanostructures and in the interfacial junction between Au and ZnO. Different LED excitation sources have been systematically selected in the whole UV–vis-NIR range to evaluate the photocatalytic response of the Au-ZnO heterostructures towards the oxidation of n-hexane, selected as a model VOC present in indoor environments. The Au-ZnO exhibits visible expanded photo-response with the more energetic interband and intraband electrons and the higher LED irradiation wavelengths and it is able to outperform its ZnO plain counterpart.

Idioma: Inglés

DOI: 10.1016/j.cattod.2020.03.063

Año: 2021

Publicado en: Catalysis Today 362 (2021), 97 - 103
ISSN: 0920-5861

Factor impacto JCR: 6.562 (2021)

Categ. JCR: CHEMISTRY, APPLIED rank: 10 / 73 = 0.137 (2021) - Q1 - T1
Categ. JCR: ENGINEERING, CHEMICAL rank: 26 / 143 = 0.182 (2021) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 51 / 165 = 0.309 (2021) - Q2 - T1

Factor impacto CITESCORE: 10.4 - Chemical Engineering (Q1)

Factor impacto SCIMAGO: 1.094 - Chemistry (miscellaneous) (Q1) - Catalysis (Q1)

Financiación: info:eu-repo/grantAgreement/EC/H2020/742684/EU/Catalytic Dual-Function Devices Against Cancer/CADENCE
Financiación: info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3
Financiación: info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/MAT2016-79776-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2016-79419-R

Tipo y forma: Artículo (PrePrint)

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