Visible Light-Promoted Plasmon Resonance to Induce 'Hot' Hole Transfer and Photothermal Conversion for Catalytic Oxidation
| Autor: | Joshua P. McClure, David R. Baker, Jonathan Boltersdorf, Cynthia A. Lundgren, Asher C. Leff, Gregory T. Forcherio |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Formic acid 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy chemistry Catalytic oxidation Titanium dioxide Photocatalysis Nanorod Physical and Theoretical Chemistry Surface plasmon resonance 0210 nano-technology Bond cleavage Visible spectrum |
| Zdroj: | The Journal of Physical Chemistry C. 122:28934-28948 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Titanium dioxide (TiO2) semiconductor photocatalysts were photosensitized to the visible spectrum with gold nanospheres (AuNSs) and gold nanorods (AuNRs) to study the ethanol photo-oxidation cycle, with an emphasis toward driving carbon–carbon (C–C) bond cleavage at low temperatures. The photocatalysts exhibited a localized surface plasmon resonance (SPR) that was harnessed to drive the complete photo-oxidation of formic acid (FA) and ethanol (EtOH) via augmented carrier generation/separation and photothermal conversion. Contributions of transverse and longitudinal localized SPR modes were decoupled by irradiating AuNSs–TiO2 and AuNRs–TiO2 with targeted wavelength ranges to probe their effects on plasmonically assisted photocatalytic oxidation of FA and EtOH. Photocatalytic performance was assessed by monitoring the yield of gaseous products during photo-oxidation experiments using a gas chromatography–mass spectrometry–multiple headspace extraction (GC–MS–MHE) analysis method. The complete oxidation of E... |
| Databáze: | OpenAIRE |
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