In-situ synthesis of plasmonic Ag/Ag3PO4 tetrahedron with exposed {111} facets for high visible-light photocatalytic activity and stability

Wan, Jun; Liu, Enzhou; Fan, Jing; Hu, Xiaoyun; Sun, Lin; Tang, Chunni; Yin, Yunchao; Li, Hua; Hu, Yang

doi:10.1016/j.ceramint.2015.01.148

Cited by 47 publications

(23 citation statements)

References 49 publications

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“…These asymmetric peaks were fitted as described in Figure b–d at 367.13/367.97 eV for Ag 3d5/2 and at 373.14/373.98 eV for Ag 3d3/2. The high‐intensity peaks at 367.13 and 373.14 eV correspond to Ag + ions, whereas the low‐intensity peaks at 367.97 and 373.98 eV are associated with metallic Ag …”

Section: Resultsmentioning

confidence: 99%

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Santos

Assis

Machado

et al. 2019

Part & Part Syst Charact

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In this work, for the first time, the instantaneous nucleation and growth processes of Ag nanoparticles on Ag3PO4 mediated by femtosecond laser pulses are reported and analyzed. The investigated samples are pure Ag3PO4 sample, electron‐irradiated Ag3PO4 sample, and laser‐irradiated sample. Complete characterization of the samples is performed using X‐ray diffraction (XRD), Rietveld refinements, field emission scanning electron microscopy, and energy dispersive spectroscopy (EDS). XRD confirms that the irradiated surface layer remains crystalline, and according to EDS analysis, the surface particles are composed primarily of Ag nanoparticles. This method not only offers a one‐step route to synthesize Ag nanoparticles using laser‐assisted irradiation with particle size control, but also reports a complex process involving the formation and subsequent growth of Ag nanoparticles through an unexpected additive‐free in situ fabrication process.

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Section: Resultsmentioning

confidence: 99%

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Santos

Assis

Machado

et al. 2019

Part & Part Syst Charact

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“…Since the discovery of hydrogen evolution by photoinduced water splitting over TiO 2 electrode [1], semiconductor-based photocatalysis has attracted great attention in the field of solar energy conversion and environment remediation [2][3][4][5][6][7][8][9], and considerable efforts have been dedicated to the design of various semiconductor photocatalysts with improved performance. TiO 2 -based semiconductors with good chemical stability and environmental-friendly features have received far more attention in the field of photocatalytic water splitting, reduction of CO 2 with H 2 O to form hydrocarbon fuels, and wastewater treatment by photodegradation of organic pollutants [10][11][12][13][14][15]. However, its utilization is negatively affected by the high recombination probability of photoexcited electronhole pairs and its relatively large band gap (Eg = 3.2 eV).…”

Section: Introductionmentioning

confidence: 99%

Efficient Degradation of Methylene Blue over Two‐Dimensional Au/TiO₂ Nanosheet Films with Overlapped Light Harvesting Nanostructures

Chen

Bian

et al. 2015

Journal of Nanomaterials

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Two-dimensional TiO2nanosheet films with visible light trapping nanostructures were successfully fabricated by alkali hydrothermal reaction using Ti sheet as precursor. Metallic Au nanoparticles (NPs) were then deposited on the surface of TiO2film through a microwave-assisted reduction process. The investigations reveal that the localized surface plasmon resonance (LSPR) of Au NPs is greatly enhanced by the overlapped light harvesting nanostructures between TiO2film and Au NPs, resulting in an enhanced LSPR-absorption with two peaks at 389 nm and 540 nm. The photocatalytic performance of the samples was evaluated by degradation of methylene blue (MB) as a model pollutant. The experimental results indicate that the photocatalytic performance of TiO2is greatly promoted by a synergetic effect between the overlapped light harvesting nanostructures and the improved charge carrier separation processes. The MB degradation over the optimal sample is much faster than that of pure TiO2film by a factor of 3.0 and 5.7 under UV light and UV + visible light irradiation, respectively. This study provides a simple strategy to develop film-shaped plasmonic photocatalysts with high efficiency.

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“…In addition, Ag 0 nanoparticles also can be activated under visible-light irradiation through the SPR effect, resulting in the formation of electron–hole pairs. 54 The photoelectrons in the Ag 3 PO 4 are easily transferred to Ag 0 nanoparticles and then recombine with the SPR-induced holes on Ag 0 nanoparticles. 55,56 As a result, the photocorrosion is prevented by the translation of electrons from the CB of Ag 3 PO 4 to Ag 0 nanoparticles, leading to the improved stability of the composite photocatalyst.…”

Section: Results and Discussionmentioning

confidence: 99%

Tetrahedral UMOFNs/Ag₃PO₄ Core–Shell Photocatalysts for Enhanced Photocatalytic Activity under Visible Light

et al. 2019

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A new visible-light-responsive tetrahedral ultrathin metal–organic framework nanosheet (UMOFNs)/Ag3PO4 composite photocatalyst with a core–shell structure was readily synthesized by sonication in an organic solvent. Characterization methods for the photocatalyst included X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and UV–vis diffuse reflectance spectroscopy. The XRD patterns of the composite photocatalyst before and after visible-light irradiation demonstrated that trace amounts of Ag ions in the composite photocatalyst easily transformed into Ag nanoparticles, which play a role in promoting charge separation at the interface of a heterojunction. The UMOFNs/Ag3PO4 composite photocatalyst showed higher photocatalytic activity for the photodegradation of 2-chlorophenol (2-CP) under visible-light irradiation (>420 nm) than Ag3PO4. The complete degradation of 2-CP was achieved in 7 min using the tetrahedral UMOFNs/Ag3PO4 core–shell photocatalyst, and the apparent reaction rate was approximately 26 times higher than that of pure Ag3PO4. Further, a scavenger experiment showed h+ and O2•– were the major reactive species involved in the photocatalytic reaction system. This enhanced photocatalytic activity results from the efficient separation of photoinduced electron–hole pairs and the increase of interface area between Ag3PO4, UMOFNs, and the Ag nanoparticles.

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In-situ synthesis of plasmonic Ag/Ag3PO4 tetrahedron with exposed {111} facets for high visible-light photocatalytic activity and stability

Cited by 47 publications

References 49 publications

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Efficient Degradation of Methylene Blue over Two‐Dimensional Au/TiO₂ Nanosheet Films with Overlapped Light Harvesting Nanostructures

Tetrahedral UMOFNs/Ag₃PO₄ Core–Shell Photocatalysts for Enhanced Photocatalytic Activity under Visible Light

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In-situ synthesis of plasmonic Ag/Ag3PO4 tetrahedron with exposed {111} facets for high visible-light photocatalytic activity and stability

Cited by 47 publications

References 49 publications

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag3PO4 Induced by Electron Beam and Femtosecond Laser

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag3PO4 Induced by Electron Beam and Femtosecond Laser

Efficient Degradation of Methylene Blue over Two‐Dimensional Au/TiO2 Nanosheet Films with Overlapped Light Harvesting Nanostructures

Tetrahedral UMOFNs/Ag3PO4 Core–Shell Photocatalysts for Enhanced Photocatalytic Activity under Visible Light

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Product

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Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Proof‐of‐Concept Studies Directed toward the Formation of Metallic Ag Nanostructures from Ag₃PO₄ Induced by Electron Beam and Femtosecond Laser

Efficient Degradation of Methylene Blue over Two‐Dimensional Au/TiO₂ Nanosheet Films with Overlapped Light Harvesting Nanostructures

Tetrahedral UMOFNs/Ag₃PO₄ Core–Shell Photocatalysts for Enhanced Photocatalytic Activity under Visible Light