Electron transfer dynamics and yield from gold nanoparticle to different semiconductors induced by plasmon band excitation

Du, Luchao; Wang, Xi; Zhang, J.B.; Matsuzaki, Hiroyuki; Furube, Akihiro

doi:10.1016/j.cplett.2018.04.043

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…Thus, they will strongly absorb visible light including solar light and causing the color effect [3]. Moreover, since the high interaction ability on the surface of other materials, the Au nanoparticles are commonly used as an agent to get the mutagenic properties within the catalysis, polymer, semiconductor, and medicine fields [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hierarchical Structure Au/ZnO Composite for Enhanced Photocatalytic Performance: Characterization, Effects of Reaction Parameters, and Oxidizing Agent Investigations

Pham

Truong

et al. 2021

Adsorption Science & Technology

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Zinc oxide (ZnO) has been shown as a potential photocatalyst under ultraviolet (UV) light but its catalytic activity has a limitation under visible (Vis) light due to the wide bandgap energy and the rapid recombination of electrons and holes. Thus, hierarchical structure Au/ZnO composites were fabricated by the hydrothermal method and chemical reduction method for enhanced photocatalytic performance under visible light. As-prepared composites were characterized by UV-vis diffuse reflectance spectra (DR/UV-Vis), field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and electron paramagnetic resonance (EPR). The Au/ZnO-5 composite showed the highest adsorption among as-prepared samples in the range of 250-550 nm, having bandgap energy of 0.13 eV. Au nanoparticles of about 3-5 nm were well dispersed on hierarchical flower ZnO with approximately 10-15 μm. The EPR signal at g = 1.965 on both ZnO and Au/ZnO samples was attributed to oxygen vacancy Vo•, but the presence of Au led to a decrease in signal strength of Au/ZnO composite, showing the degradation efficiency (DE) and reaction rate of 99.2% and 0.109 min-1, respectively; these were larger than those of other samples. The effects of reaction parameters and oxidizing agents on photocatalytic performance were investigated and showed that the presence of H2O2 and O2 could improve the reaction of composite. In addition, the kinetic and photocatalytic mechanism of tartrazine (TA) on catalysts were studied by the first-order kinetic model and characterized analyses.

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Section: Introductionmentioning

confidence: 99%

Preparation of Hierarchical Structure Au/ZnO Composite for Enhanced Photocatalytic Performance: Characterization, Effects of Reaction Parameters, and Oxidizing Agent Investigations

Pham

Truong

et al. 2021

Adsorption Science & Technology

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“…The η inj for Au-based systems have been previous reported to be 10−40% for Au-based particulate photocatalysts. 73,74 However, for consistency and comparison purposes with previous reports, 72 η inj was assumed to be 100% in the presence of SR, which yields a maximum η sep of 21.2% at 0.68 V from the LSV curve after activation (Figure 5A). This value is comparable to that of state-of-the-art semiconductor array photoanodes.…”

Section: Resultsmentioning

confidence: 84%

“…In the presence of the SR, the charge separation efficiency (η sep ) of the hybrid plasmonic photocatalyst can be calculated from the LSV curves and eq : where J photo is the measured photocurrent density; J abs is the theoretical current density (799 mA/cm 2 , see SI) and is determined by the absorbed light power; and η inj is the charge injection efficiency. The η inj for Au-based systems have been previous reported to be 10–40% for Au-based particulate photocatalysts. , However, for consistency and comparison purposes with previous reports, η inj was assumed to be 100% in the presence of SR, which yields a maximum η sep of 21.2% at 0.68 V from the LSV curve after activation (Figure A). This value is comparable to that of state-of-the-art semiconductor array photoanodes …”

Section: Resultsmentioning

confidence: 99%

Wavelength-Dependent Bifunctional Plasmonic Photocatalysis in Au/Chalcopyrite Hybrid Nanostructures

An¹,

Kays²,

Lightcap

et al. 2022

ACS Nano

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Excited, or "hot" charge carrier generation and transfer driven by the decay of localized surface plasmon resonances (LSPRs) are key steps in plasmonic photocatalysis. Hybrid structures that contain both metal and semiconductor building blocks facilitate the extraction of reactive charge carriers and their utilization for photoelectrocatalysis. Additional functionality arises from hybrid structures that combine noble metal nanostructures with semiconductor components, such as chalcopyrite (CuFeS 2 ) nanocrystals (NCs), which by themselves support quasistatic resonances. In this work, we use a hybrid membrane to integrate Au nanorods (NRs) with a longitudinal LSPR at 745 nm and CuFeS 2 NCs with a resonance peak at 490 nm into water-stable nanocomposites for robust and bifunctional photocatalysis of oxygen and hydrogen evolution reactions in a wavelength-dependent manner. Excitation of NRs or NCs in the nanocomposite correlates with increased hydrogen or oxygen evolution, respectively, consistent with a light-driven electron transfer between the metal and semiconductor building blocks, the direction of which depends on the wavelength. The bifunctional photoreactivity of the nanocomposite is enhanced by Cu(I)/Cu(II)-assisted catalysis on the surface of the NCs.

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“…In many cases, these reactions are carried out with the aid of other co‐reactants such as hydrogen peroxide or sodium borohydride with moderate to strong oxidant or reducing power, respectively . The most reported photocatalytic materials are semiconductors like titanium dioxide (TiO 2 ) or zinc oxide (ZnO), since they show relatively low price, great performance, chemical stability and long durability , , . However, their major downside is the specific requirement of ultraviolet (UV) wavelengths for their photoactivation, which is relatively more expensive to maintain and represents only around 5 % of the total solar radiation.…”

Section: Introductionmentioning

confidence: 99%

“…Silver or gold‐based nanoparticles can enhance the catalytic response of other material upon excitation with visible‐near infrared (Vis‐NIR) light due to this LSPR effect. By using these materials, it is feasible to promote the reactions under milder conditions and without harmful agents , , …”

Section: Introductionmentioning

confidence: 99%

Triangular and Prism‐Shaped Gold‐Zinc Oxide Plasmonic Nanostructures: In situ Reduction, Assembly, and Full‐Range Photocatalytic Performance

et al. 2019

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Gold-based nanocatalysts have been traditionally selected for multiple homogeneous and heterogeneous reactions of interest involving redox processes. Likewise, greener routes involving more efficient reactors and the use of inexpensive and nature-mimicking excitation sources have boosted the research on photocatalysts that can drive these chemical reactions upon excitation with multiple wavelength sources beyond the UV range. In the present work we report on a multi-step synthesis approach that enables the in situ generation of triangular and prism-shaped gold nanostructures with a localized surface plasmon resonance effect and their direct assembly onto a ZnO nanostructured semiconductor support. Different [a]

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Electron transfer dynamics and yield from gold nanoparticle to different semiconductors induced by plasmon band excitation

Cited by 7 publications

References 24 publications

Preparation of Hierarchical Structure Au/ZnO Composite for Enhanced Photocatalytic Performance: Characterization, Effects of Reaction Parameters, and Oxidizing Agent Investigations

Preparation of Hierarchical Structure Au/ZnO Composite for Enhanced Photocatalytic Performance: Characterization, Effects of Reaction Parameters, and Oxidizing Agent Investigations

Wavelength-Dependent Bifunctional Plasmonic Photocatalysis in Au/Chalcopyrite Hybrid Nanostructures

Triangular and Prism‐Shaped Gold‐Zinc Oxide Plasmonic Nanostructures: In situ Reduction, Assembly, and Full‐Range Photocatalytic Performance

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