Autor segons l'article: Negrín-Montecelo, Y; Geneidy, AHA; Govorov, AO; Alvarez-Puebla, RA; Besteiro, LV; Correa-Duarte, MA
Departament: Química Física i Inorgànica
Autor/s de la URV: Alvarez Puebla, Ramon Angel
Paraules clau: Quantum dots Plasmonics Photocatalysis Nanostructures Hot electrons Field enhancement
Resum: 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.
Àrees temàtiques: 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
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: ramon.alvarez@urv.cat
Identificador de l'autor: 0000-0003-4770-5756
Data d'alta del registre: 2024-01-29
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c00733
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Acs Photonics. 10 (9): 3310-3320
Referència 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 de l'article: 10.1021/acsphotonics.3c00733
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2023
Tipus de publicació: Journal Publications
Repositori URV