Au or Ag nanoparticle-decorated 3D urchin-like TiO2 nanostructures: Synthesis, characterization, and enhanced photocatalytic activity

[Display omitted] •Au or Ag nanoparticle-decorated 3D urchin-like TiO2 nanostructures were prepared.•The decorated nanostructures show quenched photoluminence.•The decorated nanostructures exhibit superior photocatalytic activity. The semiconductors decorated with noble metals have attracted increas...

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Bibliographic Details
Published in:Journal of colloid and interface science 2013-08, Vol.403, p.22-28
Main Authors: Xiang, Liqin, Zhao, Xiaopeng, Shang, Chaohong, Yin, Jianbo
Format: Article
Language:English
Subjects:
absorption
Au or Ag nanoparticles
Benzenesulfonates - chemistry
Catalysis
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Gold
Gold - chemistry
Indexing in process
Metal Nanoparticles - chemistry
Nanocomposites
Nanomaterials
nanosilver
Nanostructure
Oxidation-Reduction
Photocatalysis
Photochemical Processes
Photochemistry
Photodegradation
photolysis
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
physicochemical properties
Quenched photoluminence
Semiconductors
Silver
Silver - chemistry
Surface plasmon
Titanium - chemistry
Titanium dioxide
Urchin-like TiO2
Water Purification - methods
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Summary:[Display omitted] •Au or Ag nanoparticle-decorated 3D urchin-like TiO2 nanostructures were prepared.•The decorated nanostructures show quenched photoluminence.•The decorated nanostructures exhibit superior photocatalytic activity. The semiconductors decorated with noble metals have attracted increasing attention due to their interesting physical and chemical properties. Here, 3D urchin-like hierarchical TiO2 nanostructures decorated with Au or Ag nanoparticles were prepared by wet-chemical process. The morphology and structure were characterized by different techniques. It shows that Au or Ag nanoparticles with narrow distribution are uniformly loaded on urchin-like TiO2 nanostructures, and the resulted composite nanostructures show distinct surface plasmon absorption band and quenched photoluminence compared to pure TiO2 nanostructures. Photocatalytic tests show both Au-decorated TiO2 and Ag-decorated TiO2 exhibit enhanced photocatalytic activity for photodegradation of methyl blue in water.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2013.04.015