Interfacial States in Au/Reduced TiO2 Plasmonic Photocatalysts Quench Hot-Carrier Photoactivity

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F23%3A73620164" target="_blank" >RIV/61989592:15640/23:73620164 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27640/23:10253036
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.jpcc.3c04176" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jpcc.3c04176</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.3c04176" target="_blank" >10.1021/acs.jpcc.3c04176</a>

Result language
angličtina
Original language name
Interfacial States in Au/Reduced TiO2 Plasmonic Photocatalysts Quench Hot-Carrier Photoactivity
Original language description
Understanding the interface of plasmonic nanostructuresis essentialfor improving the performance of photocatalysts. Surface defects insemiconductors modify the dynamics of charge carriers, which are notwell understood yet. Here, we take advantage of scanning photoelectrochemicalmicroscopy (SPECM) as a fast and effective tool for detecting theimpact of surface defects on the photoactivity of plasmonic hybridnanostructures. We evidenced a significant photoactivity activationof TiO2 ultrathin films under visible light upon mild reductiontreatment. Through Au nanoparticle (NP) arrays deposited on differentreduced TiO2 films, the plasmonic photoactivity mappingrevealed the effect of interfacial defects on hot charge carriers,which quenched the plasmonic activity by (i) increasing the recombinationrate between hot charge carriers and (ii) leaking electrons (injectedand generated in TiO2) into the Au NPs. Our results showthat the catalyst's photoactivity depends on the concentrationof surface defects and the population distribution of Au NPs. Thepresent study unlocks the fast and simple detection of the surfaceengineering effect on the photocatalytic activity of plasmonic semiconductorsystems.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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