Highly Efficient Visible Light Plasmonic Photocatalyst Ag@Ag(Br,I)

Wang, Peng; Huang, Baibiao; Zhang, Qianqian; Zhang, Xiaoyang; Qin, Xiaoyan; Dai, Ying; Zhan, Jie; Yu, Jiaoxian; Liu, Haixia; Lou, Zaizhu

doi:10.1002/chem.200903361

Cited by 197 publications

(124 citation statements)

References 57 publications

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“…However, this point is also regarded as its major drawback, as single silver halide component is difficult to be formed. Another acidetching anion exchange reaction can also be used to fabricate series of AgX nanostructures [213]. While differ from conventional anion exchange reaction comparing Fig.…”

Section: In Situ Ion Exchangementioning

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: In Situ Ion Exchangementioning

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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“…Generally, the bare AgX (X = Cl, Br, I) samples could exhibit distinct adsorption only in the UV region but limited in the VL region. 13,16,32,33 However, the Ag/AgBr-CNTs photocatalyst has apparent absorption intensity in VL region with a significant enhancement (Figure 4a). Similar results were also obtained for Ag/AgCl-CNTs and Ag/AgI-CNTs (Figure 4b, c).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…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 4 ·3H 2 O composite, 4 and AgBr/WO 3 20 have recently been successfully synthesized.…”

Section: ■ Introductionmentioning

confidence: 95%

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

151

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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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“…Particularly, AgBr, which has a band gap of 2.6 eV, is well known as a photosensitive material and has been extensively applied to photographic films, which demonstrated excellent performance in degradation of dye pollutants and decomposition of water [8][9][10]. For example, Ag/AgBr/TiO 2 [11], Ag-AgBr/TiO 2 /RGO [12], AgBr(I)@Ag [13], Fe(III)/AgBr [14], and Ag/AgBr/ZnO [15] have been successfully fabricated by diverse techniques, and their novel and unique photocatalytic properties have been extensively explored.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Separable Fe3O4/AgBr Hybrid Materials: Highly Efficient Photocatalytic Activity and Good Stability

Cao¹,

Li²,

Li³

et al. 2016

Nano Online

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Magnetically separable Fe 3 O 4 /AgBr hybrid materials with highly efficient photocatalytic activity were prepared by the precipitation method. All of them exhibited much higher photocatalytic activity than the pure AgBr in photodegradation of methyl orange (MO) under visible light irradiation. When the loading amount of Fe 3 O 4 was 0.5 %, the hybrid materials displayed the highest photocatalytic activity, and the degradation yield of MO reached 85 % within 12 min. Silver halide often suffers serious photo-corrosion, while the stability of the Fe 3 O 4 /AgBr hybrid materials improved apparently than the pure AgBr. Furthermore, depositing Fe 3 O 4 onto the surface of AgBr could facilitate the electron transfer and thereby leading to the elevated photocatalytic activity. The morphology, phase structure, and optical properties of the composites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-visible diffuse reflectance spectra (UV-vis DRS), and photoluminescence (PL) techniques.

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Highly Efficient Visible Light Plasmonic Photocatalyst Ag@Ag(Br,I)

Cited by 197 publications

References 57 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

Magnetically Separable Fe3O4/AgBr Hybrid Materials: Highly Efficient Photocatalytic Activity and Good Stability

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