A new approach for fabricating Au-Ag alloy nanoparticles confined in Al 2 O 3 matrix

Yuan, Cailei; Wei, Wenyan; Mei, Yaxing; Luo, Xingfang; Lei, Wen

doi:10.1016/j.matlet.2017.01.011

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…The binding energy of Au 4f7/2 is 83.7 eV, there is a negative shift of −0.3eV when compared with bulk metallic gold (84.0 eV). Similar results were reported in other studies [38,39]. The shift can be explained by the effect of TiO2 support.…”

Section: Optical Propertiessupporting

confidence: 92%

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

et al. 2020

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Exploring solar-excited heterogeneous photocatalysts by taking advantage of surface plasmon resonance (SPR) has drawn growing research attention. As it could help to pave the way for global sustainable development. The decoration of TiO2 particles with noble metals possessing SPR effects is regarded as one of the most effective solutions. The perfect match of the SPR absorption band with the spectrum of incident light is an essential factor for plasmonic enhancement. However, modifying with sole noble metal is often limited as it tunes wavelength of only several nanometers. To overcome this drawback, an alternative approach can be offered by decoration with more than one noble metal. For instance, Au-Ag co-decoration displays greatly adjustable, composition-dependent SPR agent over a broad range of the visible light spectrum (ca. from 415 to 525 nm). Hence Au-Ag complex is a remarkable candidate for tuning the photo adsorption of TiO2 from UV to visible light. This study presents a novel and tailored method for the fabrication of Au-Ag co-modified TiO2 particles, and how Au-Ag dependent SPR was applied as the visible light-responsive TiO2 based photocatalysts in a simple but reliable way. The fabricated Au-Ag co-decorated TiO2 (AuxAg(1−x)/TiO2) was characterized and proved to own excellent stability and large specific surface area. The optimization of these particles against the wavelength of maximal solar light intensity was confirmed by photo degradation of methylene blue under visible light radiation. This work may provide further insight into the design of TiO2-based composites with improved photocatalytic properties for environmental remediation and renewable energy utilization.

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Section: Optical Propertiessupporting

confidence: 92%

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

et al. 2020

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“…[14][15] Alloying Au and Ag with metals such as Al can produce a highly stable composite material due to their unique electrical properties, chemical stability, and thermal conductivity, as well as low thermal expansion. [16][17][18][19] Also, their optical response generally lies within the visible light spectrum due to their high concentration of free electrons which favors polarizability. [20][21][22] Most of the research on these plasmonic materials has been conducted using pure metals, and their nonlinear properties have been rigorously measured by means of degenerate four wave mixing and/or z-scan technique.…”

Section: Introductionmentioning

confidence: 99%

Au–Ag–Al Nano‐Alloy Thin Films as an Advanced Material for Photonic Applications: XPS Analysis, Linear and Nonlinear Optical Properties Under CW Regime

Abu-Safe

Al-Esseili

El-Nasser

et al. 2020

Crystal Research and Technology

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The compositional and optical properties of an aluminum‐based transition‐metal alloy system (Au–Ag–Al) as an advanced material for photonic applications are investigated. The system is fabricated by sequentially evaporating thin layers of gold, silver, and aluminum. The thickness of Al is varied to reflect different percentages in the alloyed films. Alloying of the metals is confirmed from the shifts in the electronic binding energy of the pure elements through X‐ray photoelectron spectroscopy. The current–voltage measurements demonstrate good ohmic conductivity in the films and the optical properties are obtained by standard absorption and z‐scan techniques. Plasmonic peaks are observed in the alloyed system related to the participating metals. The thermal nonlinear optical response is conducted in the continuous wave (CW) regime. The films show large values for the thermo‐optical coefficient (∂n/∂T) which results in high values (≈10−3 cm2 W−1) for the third‐order nonlinear coefficient (n2them). A discussion of these values and their impact on the application of thin alloyed metals is presented.

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Highly dispersed Pt nanoparticles on hierarchical titania nanoflowers with {010} facets for gas sensing and photocatalysis

et al. 2019

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A new approach for fabricating Au-Ag alloy nanoparticles confined in Al 2 O 3 matrix

Cited by 6 publications

References 16 publications

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

Au–Ag–Al Nano‐Alloy Thin Films as an Advanced Material for Photonic Applications: XPS Analysis, Linear and Nonlinear Optical Properties Under CW Regime

Highly dispersed Pt nanoparticles on hierarchical titania nanoflowers with {010} facets for gas sensing and photocatalysis

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