Plasmonic Effect Enhanced Photocurrent in Nanostructured TiO2 Films Decorated with Gold Nanoparticles

Long, Pham Duy; Chien, Dang Tran; Trung, Nguyễn Thành; Hieu, Nguyen Si; Hà, Lê Thị Thu; Cat, Vu Van; Lãm, Vũ Đình

doi:10.1007/s11664-017-5436-6

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…When the size of the AuNPs increased from 5 nm to 60 nm, the intensity of these peaks significantly decreased and the peak position slightly red-shifted from 535 nm to 558 nm. This result agreed with theprevious studies [13,15], where the authors indicated that the plasmonic resonance peak position shifted toward a longer wavelength with the increase in Au nanoparticles size. Figure 5 presented the photoluminescence (PL) spectra of the Au@TiO 2 nanocomposite films with different AuNPs sizes.…”

Section: Resultssupporting

confidence: 93%

“…Many studies have demonstrated that the presence of AuNPs increased the photocatalytic activity of composite materials and thereby improved the decomposition efficiency of organic compounds [1,3,10], enhanced the efficiency ofhydrogen production from water [1,11] or boosted the performance of plasmonic solar cells [6]. This is explained by the following: (i) the SPR effect of the AuNPs leads to extending the absorption of the Au@TiO 2 nanocomposite material to the visible light range, thereby increasing the light harvesting; (ii) AuNPs in contact with TiO 2 have formed a Schottky barrier, where electrons from n-TiO 2 to metal nanoparticles increased the ability to separate charge carriers, leading to increase photocatalytic as well as photochemical processes of the nanocomposite material [12,13]; (iii) the presence of metal nanoparticles increases light scattering, thus increasing light absorption. However, the role of AuNPs sizes on optical and electrical properties of nanocomposite thin films has not been adequately clarified.…”

Section: Introductionmentioning

confidence: 99%

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Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Pham

Nguyen

et al. 2021

Comm. in Phys.

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This study focuses on the influence of gold nanoparticle sizes on optical and electrical properties of Au@TiO2 nanocomposite films. Here, the gold nanoparticles (AuNPs) of different sizes of 5 nm, 10 nm, 20 nm, 40 nm and 60 nm were dispersed onto nanoporous TiO2 thin films to form Au@TiO2 nanocomposite films. FE-SEM images and UV-vis absorption spectra show that AuNPs had good dispersion on the TiO2 films and all Au@TiO2 nanocomposite films exhibited a good surface plasmon resonance (SPR) with the resonance absorption peaks in the visible light region (about 550 nm). The effect of AuNPs on the films photoluminescence property was investigated using excited laser light of 325 nm wavelength at room temperature. The films electrical properties were studied from the change of the photocurrent under illumination of solar simulator and UV light source. The results show that the presence of gold nanoparticles has significantly improved the photocurrent of Au@TiO2 nanocomposite films and especially when AuNPs size was less than 20 nm. In addition, we also found that the photocurrent magnitude of the films with small AuNPs sizes (5 nm and 10 nm) under solar simulator light was 4 times larger than the one under UV light. These results indicate that AuNPs size had a great influence on the improvement of photocurrent in nanocomposite films.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Pham

Nguyen

et al. 2021

Comm. in Phys.

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“…The use of gold nanoparticles (Au NPs) has also been one of breakthrough strategies to overcome and enhanced for the photocatalysis process based on effect of localized surface plasmon resonances (LSPRs) [24]. This phenomenon might take place within Au NPs when they absorb visible light.…”

Section: Introductionmentioning

confidence: 99%

Efficient photoanode with a MoS₂/TiO₂/Au nanoparticle heterostructure for ultraviolet-visible photoelectrocatalysis

Mai,

Do,

Pham

et al. 2024

Nanotechnology

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Green energy technology is generally becoming one of hot issues that need to be solved due to the adverse effects on the environment of fossil fuels. One of the strategies being studied and developed by theorists and experimentalists is the use of photoelectrochemical (PEC) cells, which are emerging as a candidate to produce hydrogen from water splitting. However, creating photoelectrodes that meet the requirements for PEC water splitting has emerged as the primary obstacle in bringing this technology to commercial fruition. Here, we construct a heterostructure, which consists of MoS2/TiO2/Au nanoparticles (NPs) to overcome the drawbacks of the photoanode. Owing to the dependence on charge transfer, the bandgap of MoS2/TiO2 and the utilization the Au NPs as a stimulant for charges separation of TiO2 by localized surface plasmon resonances effect as well as the increase of hot electron injection to cathode, leading to photocatalytic activities are improved. The results have recorded a significant increase in the photocurrent density from 2.3 μ A c m − 2 of TiO2 to approximately 16.3 μ A c m − 2 of MoS2/TiO2/Au NPs. This work unveils a promising route to enhance the visible light adsorption and charge transfer in photo-electrode of the PEC cells by combining two-dimensional materials with metal NPs.

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Optoelectronic Properties of TiO ₂ Nanorods/ Au Nanoparticles Heterostructure

Raval

Ray

Tripathi

2022

1D Semiconducting Hybrid Nanostructures

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Plasmonic Effect Enhanced Photocurrent in Nanostructured TiO2 Films Decorated with Gold Nanoparticles

Cited by 6 publications

References 19 publications

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Efficient photoanode with a MoS₂/TiO₂/Au nanoparticle heterostructure for ultraviolet-visible photoelectrocatalysis

Optoelectronic Properties of TiO ₂ Nanorods/ Au Nanoparticles Heterostructure

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Plasmonic Effect Enhanced Photocurrent in Nanostructured TiO2 Films Decorated with Gold Nanoparticles

Cited by 6 publications

References 19 publications

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Efficient photoanode with a MoS2/TiO2/Au nanoparticle heterostructure for ultraviolet-visible photoelectrocatalysis

Optoelectronic Properties of TiO 2 Nanorods/ Au Nanoparticles Heterostructure

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Efficient photoanode with a MoS₂/TiO₂/Au nanoparticle heterostructure for ultraviolet-visible photoelectrocatalysis

Optoelectronic Properties of TiO ₂ Nanorods/ Au Nanoparticles Heterostructure