Autor según el artículo: Negrín-Montecelo, Y; Geneidy, AHA; Govorov, AO; Alvarez-Puebla, RA; Besteiro, LV; Correa-Duarte, MA
Departamento: Química Física i Inorgànica
Autor/es de la URV: Alvarez Puebla, Ramon Angel
Palabras clave: Quantum dots Plasmonics Photocatalysis Nanostructures Hot electrons Field enhancement
Resumen: Photocatalysis stands as a very promising alternative to photovoltaics in exploiting solar energy and storing it in chemical products through a single-step process. A central obstacle to its broad implementation is its low conversion efficiency, motivating research in different fields to bring about a breakthrough in this technology. Using plasmonic materials to photosensitize traditional semiconductor photocatalysts is a popular strategy whose full potential is yet to be fully exploited. In this work, we use CdS quantum dots as a bridge system, reaping energy from Au nanostructures and delivering it to TiO2 nanoparticles serving as catalytic centers. The quantum dots can do this by becoming an intermediate step in a charge-transfer cascade initiated in the plasmonic system or by creating an electron-hole pair at an improved rate due to their interaction with the enhanced near-field created by the plasmonic nanoparticles. Our results show a significant acceleration in the reaction upon combining these elements in hybrid colloidal photocatalysts that promote the role of the near-field enhancement effect, and we show how to engineer complexes exploiting this approach. In doing so, we also explore the complex interplay between the different mechanisms involved in the photocatalytic process, highlighting the importance of the Au nanoparticles’ morphology in their photosensitizing capabilities.
Áreas temáticas: Química Physics, condensed matter Physics, applied Optics Nanoscience & nanotechnology Materials science, multidisciplinary Materiais Engenharias iv Engenharias iii Engenharias ii Electronic, optical and magnetic materials Electrical and electronic engineering Biotechnology Atomic and molecular physics, and optics Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: ramon.alvarez@urv.cat
Identificador del autor: 0000-0003-4770-5756
Fecha de alta del registro: 2024-01-29
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c00733
URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Acs Photonics. 10 (9): 3310-3320
Referencia de l'ítem segons les normes APA: Negrín-Montecelo, Y; Geneidy, AHA; Govorov, AO; Alvarez-Puebla, RA; Besteiro, LV; Correa-Duarte, MA (2023). Balancing Near-Field Enhancement and Hot Carrier Injection: Plasmonic Photocatalysis in Energy-Transfer Cascade Assemblies. Acs Photonics, 10(9), 3310-3320. DOI: 10.1021/acsphotonics.3c00733
DOI del artículo: 10.1021/acsphotonics.3c00733
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2023
Tipo de publicación: Journal Publications
Repositori URV