Influence of the TiO 2 Electronic Structure and of Strong Metal- Support Interaction on Plasmonic Au Photocatalytic Oxidations
| Autor: | Alberto Naldoni, a, + Francesca Riboni, b, + Marcello Marelli, a Filippo Bossola, c Giacomo Ulisse, d Aldo Di Carlo, d Igor Pí?, e, f Silvia Nappini, f Marco Malvestuto, e Maria Vittoria Dozzi, b Rinaldo Psaro, a Elena Selli, Vladimiro Dal Santo.a |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
SMSI
Materials science formic acid Nanoparticle 02 engineering and technology Electronic structure 010402 general chemistry Photochemistry 01 natural sciences PRET Catalysis Metal plasmon TiO2 Au Photodegradation Plasmon Doping gold 021001 nanoscience & nanotechnology foto-oxidation photo-oxidation 0104 chemical sciences visual_art visual_art.visual_art_medium Photocatalysis Titanium dioxide Charge carrier 0210 nano-technology photocatalysis |
| Zdroj: | Catalysis science & technology (Online) (2015). doi:10.1039/C5CY01736J info:cnr-pdr/source/autori:Alberto Naldoni, a,+ Francesca Riboni, b,?,+ Marcello Marelli, a Filippo Bossola,a,c Giacomo Ulisse,d Aldo Di Carlo, d Igor Pí?,e,f Silvia Nappini, e,f Marco Malvestuto,e Maria Vittoria Dozzi,b Rinaldo Psaro,a Elena Selli,b,* and Vladimiro Dal Santo.a,*/titolo:Influence of the TiO 2 Electronic Structure and of Strong Metal-Support Interaction on Plasmonic Au Photocatalytic Oxidations/doi:10.1039%2FC5CY01736J/rivista:Catalysis science & technology (Online)/anno:2015/pagina_da:/pagina_a:/intervallo_pagine:/volume Catalysis science & technology 6 (2016): 3220–3229. doi:10.1039/C5CY01736J info:cnr-pdr/source/autori:Alberto Naldoni, Francesca Riboni, Marcello Marelli, Filippo Bossola, Giacomo Ulisse, Aldo Di Carlo, Igor Pí?, Silvia Nappini, Marco Malvestuto, Maria Vittoria Dozzi, Rinaldo Psaro, Elena Selli and Vladimiro Dal Santo ./titolo:Influence of TiO2 electronic structure and strong metal-support interaction on plasmonic Au photocatalytic oxidations/doi:10.1039%2FC5CY01736J/rivista:Catalysis science & technology (Print)/anno:2016/pagina_da:3220/pagina_a:3229/intervallo_pagine:3220–3229/volume:6 |
| DOI: | 10.1039/C5CY01736J |
| Popis: | Aiming at understanding how plasmonic reactions depend on important parameters such as metal loading and strong metal-support interaction (SMSI), we report the plasmonic photodegradation of formic acid (FA) under green LED irradiation employing three TiO2 supports (stoichiometric TiO2, N-doped TiO2, black TiO2) modified with Au nanoparticles (NPs) 3-6 nm in size. The rate of FA photo-oxidation follows different trends depending on Au loading for stoichiometric and doped Au/TiO2 materials. In the first case, the only contribution of hot electron transfer produces a volcano-shaped curve of photoreaction rates with increasing the Au loading. When TiO2 contains intra-bandgap states the photoactivity increases linearly with the Au NPs amount, thanks to the concomitant enhancement produced by hot electron transfer and plasmonic resonant energy transfer (PRET). The role of PRET is supported by Finite-Difference Time-Domain simulations, which show that the increase of both A u NPs inter-distance and of SMSI enhances the probability of charge carrier generation at the Au/TiO2 interface. |
| Databáze: | OpenAIRE |
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