Plasmonic-enhanced photocatalysis reactions using gold nanostructured films

Ibrahem, Mohammed A.; Rasheed, Bassam G.; Mahdi, R.I.; Khazal, Taha M.; Omar, Maryam M.; O’Neill, Mary

doi:10.1039/d0ra03858j

Cited by 16 publications

(6 citation statements)

References 43 publications

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“…The observed 8-fold enhancement in visible photoconductivity in the plasmonic device is attributed to the coupling between the sub-bandgap defect states and the surface plasmons of Au nanoparticles. Two plasmonic mechanisms are jointly responsible for the sub-bandgap photocurrent enhancement in TiO 2 in the plasmonic device: hot electrons injection (HEI) and plasmonic resonance energy transfer (PRET), illustrated in Figure 5 C. These plasmonic mechanisms mainly enhance the photoconductivity in semiconductor devices, 6 , 59 , 60 despite the higher Schottky barrier; however, their active engagement with the sub-bandgap defect states is not yet considered widely in the literature.…”

Section: Resultsmentioning

confidence: 99%

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO₂ Nanoparticles Film

Ibrahem,

Verrelli,

Adawi

et al. 2024

ACS Omega

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The coupling between sub-bandgap defect states and surface plasmon resonances in Au nanoparticles and its effects on the photoconductivity performance of TiO 2 are investigated in both the ultraviolet (UV) and visible spectrum. Incorporating a 2 nm gold nanoparticle layer in the photodetector device architecture creates additional trapping pathways, resulting in a faster current decay under UV illumination and a significant enhancement in the visible photocurrent of TiO 2 , with an 8-fold enhancement of the defects-related photocurrent. We show that hot electron injection (HEI) and plasmonic resonance energy transfer (PRET) jointly contribute to the observed photoconductivity enhancement. In addition to shedding light on the below-band-edge photoconductivity of TiO 2 , our work provides insight into new methods to probe and examine the surface defects of metal oxide semiconductors using plasmonic resonances.

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Section: Resultsmentioning

confidence: 99%

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO₂ Nanoparticles Film

Ibrahem,

Verrelli,

Adawi

et al. 2024

ACS Omega

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“…For example, LPR of silver or gold nanostructures was used to increase the efficiency of laser media [10,11], solar cells [12,13] and photodetectors [14], luminescent sensors [15,16], etc. But the application of the plasmon effect of metal NPs in photocatalytic systems is particularly impressive [7,17,18].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO₂/rGO composite

Seliverstova,

Serikov,

Nuraje

et al. 2024

Nanotechnology

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In this work, the plasmonic effect of Au and Ag nanoparticles in the heterostructure photocatalyst system (TiO2/rGO) was studied. The laser ablation approach was applied to synthesize Au and Ag nanoparticles to eliminate impurity influence in this plasmonic study. Characterizing tools such as SEM, TEM, XRD, Raman, UV–vis spectral techniques were applied to obtain morphological information and optical properties of the nanocomposites. Photocatalytic properties of ternary nanocomposities such as, TiO2/rGO/Ag and TiO2/rGO/Au, were evaluated against Methylene blue and Congo red dyes with changing concentration of plasmonic nanoparticles (Au and Ag) and it was founded that the nanocomposite with the concentration of 10–11 mol/L Au NPs in TiO2/rGO has the best photocatalytic activity. EIS study indicated that a significant decrease in resistance Rp (109 Ohms) was observed for TiO2/rGO at 10-11 mol/Lconcentration of Au and its lifetimes is 0.0118 s, supporting that TiO2/rGO/Au has the best photocatalytic activity at 10–11 mol/L Au in the TiO2/rGO nanocomposites.

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“…Modification of titanium dioxide with metallic nanostructures is one of the most explored topics in terms of activity enhancement of this material. There are many reports on the mechanisms of the activity increment of semiconductors in the presence of metallic nanostructures, 1–5 however, they are still inconsistent. Considering the modification with plasmonic nanostructures, the mechanisms often involve hot electron transfer, local field enhancement or energy transfer from the plasmonic nanostructure to the semiconductor.…”

Section: Introductionmentioning

confidence: 99%

New insights into the influence of plasmonic and non-plasmonic nanostructures on the photocatalytic activity of titanium dioxide

Jakimińska,

Spilarewicz,

Macyk

2023

Nanoscale Adv.

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Plasmonic-enhanced photocatalysis reactions using gold nanostructured films

Abstract: This work shows the enhancement of the visible photocatalytic activity of TiO2 NPs film using the localized surface plasmonic resonance of Au nanostructures.

Cited by 16 publications

References 43 publications

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO₂ Nanoparticles Film

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO₂ Nanoparticles Film

Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO₂/rGO composite

New insights into the influence of plasmonic and non-plasmonic nanostructures on the photocatalytic activity of titanium dioxide

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Plasmonic-enhanced photocatalysis reactions using gold nanostructured films

Abstract: This work shows the enhancement of the visible photocatalytic activity of TiO2 NPs film using the localized surface plasmonic resonance of Au nanostructures.

Cited by 16 publications

References 43 publications

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO2 Nanoparticles Film

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO2 Nanoparticles Film

Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO2/rGO composite

New insights into the influence of plasmonic and non-plasmonic nanostructures on the photocatalytic activity of titanium dioxide

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Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO₂ Nanoparticles Film

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO₂ Nanoparticles Film

Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO₂/rGO composite