AgBr-Ag-Bi2WO6 nanojunction system: A novel and efficient photocatalyst with double visible-light active components

Zhang, Lisha; Wong, Kevin; Chen, Zhigang; Yu, Jimmy C.; Zhao, Jincai; Hu, Chun; Chan, Chiu-Yeung; Wong, Po Keung

doi:10.1016/j.apcata.2009.05.028

Cited by 306 publications

(96 citation statements)

References 36 publications

(68 reference statements)

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“…As photosensitive materials, AgX and Ag/AgX (especially X = Cl and Br) are regarded as suitable semiconductor selections to modify photocatalytic composition system, which can produce efficient coupling photocatalysts with higher activity and stability compared with the single component [270][271][272][273][274][275][276]. Among them, the hybridization between AgX and other metallic semiconductor would significantly improve the light absorption efficiency and facilitate the photoinduced charge carrier separation with similar transmission routes [277][278][279][280][281][282][283][284][285][286]. Such as in TiO 2 coupling system, the spectral absorption range tuning of TiO 2 is the key factor for its visible light photocatalytic performance modification [287][288][289][290][291][292].…”

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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“…n recent years, heterogeneous photocatalytic processes that use semiconductor catalysts have emerged as promising microbial disinfection technologies (1)(2)(3)(4)(5)(6)(7). Among the various photocatalysts being used, titanium dioxide (TiO 2 ) has received the greatest interest and has been extensively studied because of its efficiency and perceived environmental safety.…”

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confidence: 99%

Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants

Huang

Xia

et al. 2015

Appl Environ Microbiol

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The dual roles of capsular extracellular polymeric substances (EPS) in the photocatalytic inactivation of bacteria were demonstrated in a TiO2-UVA system, by comparing wild-typeEscherichia colistrain BW25113 and isogenic mutants with upregulated and downregulated production of capsular EPS. In a partition system in which direct contact between bacterial cells and TiO2particles was inhibited, an increase in the amount of EPS was associated with increased bacterial resistance to photocatalytic inactivation. In contrast, when bacterial cells were in direct contact with TiO2particles, an increase in the amount of capsular EPS decreased cell viability during photocatalytic treatment. Taken together, these results suggest that although capsular EPS can protect bacterial cells by consuming photogenerated reactive species, it also facilitates photocatalytic inactivation of bacteria by promoting the adhesion of TiO2particles to the cell surface. Fluorescence microscopy and scanning electron microscopy analyses further confirmed that high capsular EPS density led to more TiO2particles attaching to cells and forming bacterium-TiO2aggregates. Calculations of interaction energy, represented by extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) potential, suggested that the presence of capsular EPS enhances the attachment of TiO2particles to bacterial cells via acid-base interactions. Consideration of these mechanisms is critical for understanding bacterium-nanoparticle interactions and the photocatalytic inactivation of bacteria.

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“…A number of all-solid-state Z-scheme photocatalysts, such as CdS-Au-TiO 2 [104] , AgBr-Ag-Bi 2 WO 6 [105] , AgBr-AgTiO 2 [106] , H 2 WO 4 /Ag/AgCl [107] , etc., has been demonstrated to exhibit a high photocatalytic activity, far exceeding those of the single-component systems. In all these multi-component Z-scheme photocatalyst systems, without exception, Figure 13 Mechanism of overall water splitting using a Z-scheme photocatalysis system.…”

Section: Z-scheme Heterojunctionsmentioning

confidence: 99%

Nanostructure designs for effective solar-to-hydrogen conversion

Shen

Mao

2012

Nanophotonics

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Conversion of energy from photons in sunlight to hydrogen through solar splitting of water is an important technology. The rising signifi cance of producing hydrogen from solar light via water splitting has motivated a surge of developing semiconductor solar-active nanostructures as photocatalysts and photoelectrodes. Traditional strategies have been developed to enhance solar light absorption (e.g., ion doping, solid solution, narrow-band-gap semiconductor or dye sensitization) and improve charge separation/transport to prompt surface reaction kinetics (e.g., semiconductor combination, co-catalyst loading, nanostructure design) for better utilizing solar energy. However, the solar-to-hydrogen effi ciency is still limited. This article provides an overview of recently demonstrated novel concepts of nanostructure designs for efficient solar hydrogen conversion, which include surface engineering, novel nanostructured heterojunctions, and photonic crystals. Those fi rst results outlined in the main text encouragingly point out the prominence and promise of these new concepts principled for designing high-effi ciency electronic and photonic nanostructures that could serve for sustainable solar hydrogen production.

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AgBr-Ag-Bi2WO6 nanojunction system: A novel and efficient photocatalyst with double visible-light active components

Cited by 306 publications

References 36 publications

Regulations of silver halide nanostructure and composites on photocatalysis

Regulations of silver halide nanostructure and composites on photocatalysis

Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants

Nanostructure designs for effective solar-to-hydrogen conversion

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