H2WO4·H2O/Ag/AgCl Composite Nanoplates: A Plasmonic Z-Scheme Visible-Light Photocatalyst

Wang, Xuefei; Li, Shufen; Ma, Ying; Yu, Huogen; Yu, Jiaguo

doi:10.1021/jp2037476

Cited by 262 publications

(139 citation statements)

References 60 publications

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“…Heterogeneous system constituted by photoactive semiconductors is regarded as an effective method to facilitate the photoexcited electron-hole separation with enhanced photocatalytic activity [254][255][256][257][258][259][260][261][262][263][264][265][266][267][268][269]. Various metallic semiconductor (such as TiO 2 , ZnO, BiVO 4 ) and metal-free nitrogen-doped graphene semiconductors have been considered as preferred substances to composite with AgX, shown as Table 2.…”

Section: Other Photoactive Semiconductormentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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The silver halides and their corresponding composites would constitute remarkable photocatalytic systems not only in energy production but also in environmental remediation. The major advantage in these silver halides system is that plasma metal Ag 0 species would be spontaneously generated by silver halides under light irradiation, which play dual roles of expanding light absorption range and charge carriers separation. In this tutorial review, the origin and development of silver halides, synthesis methods, construction of composite structures with other materials, photocatalytic applications, and various and controversial mechanisms are all exhaustively described.

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Section: Other Photoactive Semiconductormentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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“…Therefore, the conducting band (CB) and valence band (VB) energies of the AgBr are calculated to be about −0.065 and +2.625 V (vs SHE), respectively. 4 It is reported that the plasmon-induced electrons of metallic Ag nanoparticles can transfer to the CB (−0.2 V vs SHE) of TiO 2 anatase under VL illumination. 44 So it is possible that the plasmon-induced electrons at Ag nanoparticles of Ag/ AgBr-CNTs with a strong reduction power can readily transfer to CB (−0.065 V vs SHE) of AgBr.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Synthesis and Characterization of Novel Plasmonic Ag/AgX-CNTs (X = Cl, Br, I) Nanocomposite Photocatalysts and Synergetic Degradation of Organic Pollutant under Visible Light

Shi

Chen

et al. 2013

ACS Appl. Mater. Interfaces

146

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A series of novel well-defined Ag/AgX (X = Cl, Br, I) loaded carbon nanotubes (CNTs) composite photocatalysts (Ag/AgX-CNTs) were fabricated for the first time via a facile ultrasonic assistant deposition−precipitation method at the room temperature (25 ± 1°C). X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption−desorption analysis, scanning electron microscopy, and ultraviolet−visible light absorption spectra analysis were used to characterize the structure, morphology, and optical properties of the asprepared photocatalysts. Results confirmed the existence of the direct interfacial contact between Ag/AgX nanoparticles and CNTs, and Ag/AgX-CNTs nanocomposites exhibit superior absorbance in the visible light (VL) region owing to the surface plasmon resonance (SPR) of Ag nanoparticles. The fabricated composite photocatalysts were employed to remove 2,4,6-tribromophenol (TBP) in aqueous phase. A remarkably enhanced VL photocatalytic degradation efficiency of Ag/AgX-CNTs nanocomposites was observed when compared to that of pure AgX or CNTs. The photocatalytic activity enhancement of Ag/AgX-CNTs was due to the effective electron transfer from photoexcited AgX and plasmon-excited Ag(0) nanoparticles to CNTs. This can effectively decrease the recombination of electron−hole pairs, lead to a prolonged lifetime of the photoholes that promotes the degradation efficiency. KEYWORDS: plasmonic photocatalyst, carbon nanotube supporter, silver halides, visible light, photocatalytic activity ■ INTRODUCTIONPhotocatalysis technique, as a cost-effective means for solar energy utilization, hydrogen production, and environmental purification, has been focused by many researchers. 1−7 In recent years, highly efficient visible-light-driven (VLD) photocatalyst development has been recognized as an important goal in the field of photocatalysis. Generally, two major approaches have been frequently employed to fabricate VLD photocatalyst. One is to modify TiO 2 -based photocatalyst to extend the light absorption spectrum from the UV to VL region by elements doping, 2 noble metal deposition, 3,8 12 Despite the noticeable progress, these VLD photocatalysts still have some drawbacks, such as relatively low VL photocatalytic activity and poor stability, limiting their practical applications. It is therefore highly desirable to develop highly efficient VLD photocatalysts that could meet the needs for applications in environmental and energy fields.Currently, the localized surface plasmon resonance (SPR) effect of noble-metal nanoparticles (e.g., Ag and Au) has become a research focus in the development of VLD photocatalysts. 13 The VL activity of plasmonic photocatalyst is originated from the distinctive plasmon resonance effect in VL region that has been well demonstrated for metallic Au and Ag nanoparticles. 4,14−19 Also a number of Ag/AgX (X = Cl, Br)-based materials, such as graphene sheets grafted Ag/AgCl, 1 graphene oxide (GO) enwrapped Ag/AgX (X = Cl, Br) nanocomposite, 16 Ag/AgBr@TiO 2 , 18 Ag/AgCl@H 2 WO...

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“…To address these issues, the appropriate assembly of constituent semiconductors is believed to be one of the most efficient strategies. 18,19 The electron-hole separation could be well enhanced by transferring electrons from a material with a high Fermi level to another material with a low Fermi level when they contact each other. Unfortunately, the oxidative potentials (and/or reductive potentials) are bound to increase (and/or decrease) to establish a thermodynamic equilibrium with the same Fermi level of the semiconductors at the interface.…”

Section: 12mentioning

confidence: 99%

A novel strategy to promote photo-oxidative and reductive abilities via the construction of a bipolar Bi₂WO₆/N-SrTiO₃ material

Xing

Chai

et al. 2017

RSC Adv.

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Focusing on holistically promoting both photo-oxidative and reductive abilities, we constructed a novel Bi 2 WO 6 /N-SrTiO 3 composite, which was expected to have excellent properties for the removal of ions. The matched band structures of Bi 2 WO 6 and N-SrTiO 3 were beneficial for inhibiting the recombination of electron-hole pairs and maintaining the redox capacity through a Z-type n-n heterojunction. Such a bipolar design of photo-oxidative and photo-reductive semiconductor nanomaterials is concluded to be highly effective in remediating complicated toxic residual constituents of both unfixed pharmaceuticals and heavy metals in aquatic environments.

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H₂WO₄·H₂O/Ag/AgCl Composite Nanoplates: A Plasmonic Z-Scheme Visible-Light Photocatalyst

Cited by 262 publications

References 60 publications

Regulations of silver halide nanostructure and composites on photocatalysis

Regulations of silver halide nanostructure and composites on photocatalysis

Synthesis and Characterization of Novel Plasmonic Ag/AgX-CNTs (X = Cl, Br, I) Nanocomposite Photocatalysts and Synergetic Degradation of Organic Pollutant under Visible Light

A novel strategy to promote photo-oxidative and reductive abilities via the construction of a bipolar Bi₂WO₆/N-SrTiO₃ material

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H2WO4·H2O/Ag/AgCl Composite Nanoplates: A Plasmonic Z-Scheme Visible-Light Photocatalyst

Cited by 262 publications

References 60 publications

Regulations of silver halide nanostructure and composites on photocatalysis

Regulations of silver halide nanostructure and composites on photocatalysis

Synthesis and Characterization of Novel Plasmonic Ag/AgX-CNTs (X = Cl, Br, I) Nanocomposite Photocatalysts and Synergetic Degradation of Organic Pollutant under Visible Light

A novel strategy to promote photo-oxidative and reductive abilities via the construction of a bipolar Bi2WO6/N-SrTiO3 material

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Product

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H₂WO₄·H₂O/Ag/AgCl Composite Nanoplates: A Plasmonic Z-Scheme Visible-Light Photocatalyst

A novel strategy to promote photo-oxidative and reductive abilities via the construction of a bipolar Bi₂WO₆/N-SrTiO₃ material