Hierarchical Ag/AgCl-TiO2 hollow spheres with enhanced visible-light photocatalytic activity

The hierarchical Ag/AgCl-TiO2 hollow spheres were synthesized by depositing Ag/AgCl nanoparticles on TiO2 hollow spheres via a precipitation photoreduction method, and they were further characterized using TGA, SEM, TEM, XRD, XPS, UV–vis DRS and photoelectric chemical analysis. The analysis showed t...

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Bibliographic Details
Published in:Materials chemistry and physics 2017-01, Vol.185, p.143-151
Main Authors: Wang, Xu Long, Yin, Hao Yong, Nie, Qiu Lin, Wu, Wei Wei, Zhang, Yang, LiYuan, Qiu
Format: Article
Language:English
Subjects:
Catalytic activity
Chemical analysis
Electrons
Nanoparticles
Particulate composites
Photocatalysis
Photochemistry
Photodegradation
Photoelectricity
Plasma deposition
Semiconductors
Silver
Sol-gel growth
Studies
Titanium dioxide
Titanium oxides
Visible and ultraviolet spectra
X ray photoelectron spectroscopy
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Summary:The hierarchical Ag/AgCl-TiO2 hollow spheres were synthesized by depositing Ag/AgCl nanoparticles on TiO2 hollow spheres via a precipitation photoreduction method, and they were further characterized using TGA, SEM, TEM, XRD, XPS, UV–vis DRS and photoelectric chemical analysis. The analysis showed that the hierarchical Ag/AgCl-TiO2 hollow spheres exhibited the highest photocatalytic activity, which was approximately 13 times higher than that of TiO2 hollow spheres. The high photocatalytic activity of the composites is due to efficient electron-hole pairs separation at the photocatalyst interfaces, and localized surface plasmon resonance of Ag nanoparticles formed on AgCl particles in the degradation reaction. •TiO2 hollow spheres were prepared by a sacrificial template method.•The hollow spheres were modified with Ag/AgCl to form the heterojunctions.•The modification may produce synergistic effect of LSPR and hollow structure.•Visible light photocatalytic activity was enhanced on this hollow catalyst.•The mechanism of the improved photocatalytic performance was discussed.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2016.10.017