Molecular Linking Selectivity on Self-Assembled Metal-Semiconductor Nano-Hybrid Systems

Nicolás, Alba Gascón; Edvinsson, Tomas; Meng, Jie; Zheng, Kaibo; Abdellah, Mohamed; Sá, Jacinto

doi:10.3390/nano10071378

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…1 . The photoelectrode consisted of a hole-accepting material (NiO) 53 , plasmonic material (Au nanoparticles (Au NPs)) and a catalyst (Re I ( phen-NH 2 )(CO) 3 Cl) in a geometry consisting of fluorine-doped tin oxide (FTO) conductive glass with a NiO film deposited by screen printing, on which Au NPs were deposited via spray and later selectively functionalised by the Re catalyst through the -NH 2 groups of the ligand, which in the process loses its protons in accordance to what has been published elsewhere 54 and will be further on demonstrated. Transition-metal catalysts capable of facile multi-electron transformations offer an alternate pathway to circumvent mechanisms relying on the high-energy radical anion intermediate.…”

Section: Resultsmentioning

confidence: 77%

Exploiting hot electrons from a plasmon nanohybrid system for the photoelectroreduction of CO2

Dey,

Silveira,

Vadell

et al. 2024

Commun Chem

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Plasmonic materials convert light into hot carriers and heat to mediate catalytic transformation. The participation of hot carriers (photocatalysis) remains a subject of vigorous debate, often argued on the basis that carriers have ultrashort lifetime incompatible with drive photochemical processes. This study utilises plasmon hot electrons directly in the photoelectrocatalytic reduction of CO2 to CO via a Ppasmonic nanohybrid. Through the deliberate construction of a plasmonic nanohybrid system comprising NiO/Au/ReI(phen-NH2)(CO)3Cl (phen-NH2 = 1,10-Phenanthrolin-5-amine) that is unstable above 580 K; it was possible to demonstrate hot electrons are the main culprit in CO2 reduction. The engagement of hot electrons in the catalytic process is derived from many approaches that cover the processes in real-time, from ultrafast charge generation and separation to catalysis occurring on the minute scale. Unbiased in situ FTIR spectroscopy confirmed the stepwise reduction of the catalytic system. This, coupled with the low thermal stability of the ReI(phen-NH2)(CO)3Cl complex, explicitly establishes plasmonic hot carriers as the primary contributors to the process. Therefore, mediating catalytic reactions by plasmon hot carriers is feasible and holds promise for further exploration. Plasmonic nanohybrid systems can leverage plasmon’s unique photophysics and capabilities because they expedite the carrier’s lifetime.

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Section: Resultsmentioning

confidence: 77%

Exploiting hot electrons from a plasmon nanohybrid system for the photoelectroreduction of CO2

Dey,

Silveira,

Vadell

et al. 2024

Commun Chem

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“…In such a configuration the momentum conservation condition is relaxed, as there is an interface everywhere around the metal nanoparticle, and the dependency on direction is lost as no matter what direction the electrons travel, there will always be an interface, and the surrounding semiconductor, thus allowing for greater injection efficiencies. There are also indications that formation of a heteroepitaxial interface between Au and TiO 2 [ 290 ] or the use of a molecular linker to covalently bond Au NPs to TiO 2 [ 291 ] might be more effective in increasing hot carrier lifetimes than creating disordered Au–TiO 2 junctions in direct contact, although this is not yet conclusive.…”

Section: Mystery Of the Action Spectrum: Reconciling Interband Transitions With Localized Surface Plasmon Resonancesmentioning

confidence: 99%

Hot Electrons in TiO2–Noble Metal Nano-Heterojunctions: Fundamental Science and Applications in Photocatalysis

Manuel

Shankar

2021

Nanomaterials

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Plasmonic photocatalysis enables innovation by harnessing photonic energy across a broad swathe of the solar spectrum to drive chemical reactions. This review provides a comprehensive summary of the latest developments and issues for advanced research in plasmonic hot electron driven photocatalytic technologies focusing on TiO2–noble metal nanoparticle heterojunctions. In-depth discussions on fundamental hot electron phenomena in plasmonic photocatalysis is the focal point of this review. We summarize hot electron dynamics, elaborate on techniques to probe and measure said phenomena, and provide perspective on potential applications—photocatalytic degradation of organic pollutants, CO2 photoreduction, and photoelectrochemical water splitting—that benefit from this technology. A contentious and hitherto unexplained phenomenon is the wavelength dependence of plasmonic photocatalysis. Many published reports on noble metal-metal oxide nanostructures show action spectra where quantum yields closely follow the absorption corresponding to higher energy interband transitions, while an equal number also show quantum efficiencies that follow the optical response corresponding to the localized surface plasmon resonance (LSPR). We have provided a working hypothesis for the first time to reconcile these contradictory results and explain why photocatalytic action in certain plasmonic systems is mediated by interband transitions and in others by hot electrons produced by the decay of particle plasmons.

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Exploring the Ultralong Lifetime of Self‐matrix 1,10 Phenanthroline and Boron‐Based Room Temperature Phosphorescence Carbon Dots for Multiple Applications

Pricilla,

Urbanek,

Sevcik

et al. 2024

Advanced Optical Materials

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Room temperature phosphorescence carbon dots (RTP CDs) are one of the newly investigated nanomaterials because of their remarkable optical characteristics. They are widely utilized in many versatile optoelectronic and security applications. Apart from synthesis, one of its challenging attributes is its lifetime at room temperature. Here, a straightforward and quick heating approach is presented for synthesizing self‐matrix 1,10 phenanthroline and boron‐based RTP CDs. 1,10 phenanthroline is utilized as an aromatic and hetero atom containing carbon precursor and boric acid is used as a passivating to stabilize the triplet excitons and prevent nonradiative deactivation. Various characterization techniques like TEM, XRD, FTIR, UV–vis, PL, and elemental analysis (ICP and CHNS) have been used to study the properties of self‐matrix RTP CDs. The RTP CDs exhibited excellent blue‐green emission when excited at 302 nm. Compared to the available literature, the novelty of this work is observed from its high naked eye phosphorescence characteristic of ≈22 s with an average lifetime of ≈ 2.4 s at 302 nm, making them ultralong self‐matrix RTP CD material. Due to their exceptional qualities, the self‐matrix RTP CDs have been widely employed for various applications, including information encryption decryption, phosphor for LEDs, anticounterfeiting, and water sensitivity analysis.

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Molecular Linking Selectivity on Self-Assembled Metal-Semiconductor Nano-Hybrid Systems

Cited by 3 publications

References 30 publications

Exploiting hot electrons from a plasmon nanohybrid system for the photoelectroreduction of CO2

Exploiting hot electrons from a plasmon nanohybrid system for the photoelectroreduction of CO2

Hot Electrons in TiO2–Noble Metal Nano-Heterojunctions: Fundamental Science and Applications in Photocatalysis

Exploring the Ultralong Lifetime of Self‐matrix 1,10 Phenanthroline and Boron‐Based Room Temperature Phosphorescence Carbon Dots for Multiple Applications

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