Ag@AgCl: A Highly Efficient and Stable Photocatalyst Active under Visible Light

Wang, Peng; Huang, Baibiao; Qin, Xiaoyan; Zhang, Xiaoyang; Dai, Ying; Wei, Jiyong; Whangbo, Myung‐Hwan

doi:10.1002/anie.200802483

Cited by 1,322 publications

(774 citation statements)

References 25 publications

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“…As known, the Ag 3 PO 4 nanospecies could only show apparent absorptions in UV region, and in visible region with a wavelength shorter than 550 nm [16,17]. Accompanied by the abovementioned information deduced from the EDX elemental analysis and the XRD spectra shown in Figures 2 and 3, the present result further confirms the existence of metallic Ag species in our samples, which could arouse surface plasmon resonance absorptions in the visible region [9,10,41]. At the same time, it can be seen from Figure 4 that the absorption spectrum of the Ag/Ag 3 PO 4 /GO nanocomposite displays a distinct absorption of GO nanosheets at ca.…”

Section: Synthesis and Characterization Of Ag/ag 3 Po 4 And Go Hybridsupporting

confidence: 87%

“…To confirm this proposal, the XRD spectra of our products are investigated, as shown in [9]. These facts solidly confirms the formation of Ag/Ag 3 PO 4 hybrid nanocomposites in these two systems.…”

Section: Synthesis and Characterization Of Ag/ag 3 Po 4 And Go Hybridsupporting

confidence: 61%

“…Recently, in contrast to the traditional UV-light-driven photocatalysts, visible-light-energized photocatalysts in terms of AgX-based nanospecies have been demonstrated to be one of the most promising alternatives [9][10][11][12][13]. Thus far, numerous AgX-involved photocatalysts, such as Ag/AgCl, Ag/AgBr, etc., have been developed.…”

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confidence: 99%

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Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

2012

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An efficient visible-light-driven plasmonic photocatalyst with regard to graphene oxide (GO) hybridized Ag/Ag 3 PO 4 (Ag/ Ag 3 PO 4 /GO) nanostructures has been facilely synthesized via a deposition-precipitation method. The synthesized nanostructures have been characterized by means of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), UV-vis spectra, Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), and Raman spectra. It has been disclosed that compared with the bare Ag/Ag 3 PO 4 nanospecies, the GO hybridized nanostructures display enhanced photocatalytic activity for the photodegradation of methyl orange pollutant under visible-light irradiation. It is suggested that the reinforced charge transfer and the suppressed recombination of electron-hole pairs in Ag/Ag 3 PO 4 /GO, the smaller size of Ag/Ag 3 PO 4 nanospecies in Ag/Ag 3 PO 4 /GO, all of which are the consequences of the hybridization of GO, are responsible for the enhanced photocatalytic performance. The investigation might open up new opportunities to obtain highly efficient Ag 3 PO 4 -based visible-light-driven plasmonic photocatalyst for the photodegradation of organic pollutants.

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Section: Synthesis and Characterization Of Ag/ag 3 Po 4 And Go Hybridsupporting

confidence: 87%

Section: Synthesis and Characterization Of Ag/ag 3 Po 4 And Go Hybridsupporting

confidence: 61%

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Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

2012

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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%

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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“…The effective utilization of the visible light (50% of solar spectrum) is main aim of study conducted by many research teams. A numerous modifi cation techniques, which seem to be promising for TiO 2 band-gap narrowing and shift the light absorption capacity towards visible wavelengths have been proposed [14][15][16] . The titania modifi ed with noble metals (e.g.…”

Section: Introductionmentioning

confidence: 99%

Influence of titanium dioxide modification on the antibacterial properties

Rokicka

Markowska‐Szczupak

Kowalczyk

et al. 2016

Polish Journal of Chemical Technology

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Antibacterial properties of 15 titania photocatalysts, mono-and dual-modifi ed with nitrogen and carbon were examined. Amorphous TiO 2 , supplied by Azoty Group Chemical Factory Police S.A., was used as titania source (Ar-TiO 2 , C-TiO 2 , N-TiO 2 and N,C-TiO 2 calcined at 300 o C, 400 o C, 500 o C, 600 o C, 700 o C). The disinfection ability was examined against Escherichia coli K12 under irradiation with UV and artifi cial sunlight and in dark conditions. It has been found the development of new photocatalysts with enhanced interaction ability with microorganisms might be a useful strategy to improve disinfection method conducted under artifi cial sunlight irradiation. The effi ciency of disinfection process conducted under artifi cial sunlight irradiation with carbon (C-TiO 2 ) and carbon/nitrogen (N,C-TiO 2 ) photocatalysts was similar as obtained under UV irradiation. Furthermore, during dark incubation, any toxicity of the photocatalyst was noted.

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Ag@AgCl: A Highly Efficient and Stable Photocatalyst Active under Visible Light

Cited by 1,322 publications

References 25 publications

Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

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

Influence of titanium dioxide modification on the antibacterial properties

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