In situ gold-loaded titania photonic crystals with enhanced photocatalytic activity

Cai, Zhongyu, Xiong, Zhigang, Lu, Xianmao and Teng, Jinghua (2014) In situ gold-loaded titania photonic crystals with enhanced photocatalytic activity. Journal of Materials Chemistry A, 2 2: 545-553. doi:10.1039/c3ta13878j

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Author Cai, Zhongyu
Xiong, Zhigang
Lu, Xianmao
Teng, Jinghua
Title In situ gold-loaded titania photonic crystals with enhanced photocatalytic activity
Formatted title
In situ gold-loaded titania photonic crystals with enhanced photocatalytic activity
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7488
2050-7496
Publication date 2014-01-14
Year available 2013
Sub-type Article (original research)
DOI 10.1039/c3ta13878j
Open Access Status Not Open Access
Volume 2
Issue 2
Start page 545
End page 553
Total pages 9
Place of publication Cambridge, United Kingdom
Publisher RSC
Collection year 2014
Language eng
Formatted abstract
A facile two-step method is developed to fabricate three-dimensional ordered macroporous (3DOM) gold-loaded titania (TiO2) photonic crystals with enhanced photocatalytic activities. Firstly, a mixed solution of polystyrene (PS) colloids, chloroauric acid and titanium(iv)-bis-lactato- bisammonium dihydroxide (TiBALDH) sol was co-assembled into PS/TiO2 colloidal crystal films. Subsequent calcination of the samples led to the removal of PS and transformed amorphous TiO2 into the anatase phase. The resultant 3DOM inverse TiO2 opals (i-TiO2-o) and gold-loaded i-TiO2-o (i-Au-TiO2-o) show centimeter-scale long-range ordering. Photocatalytic characterization of the i-TiO2-o and i-Au-TiO2-o showed activities two-and five-fold higher than nanocrystalline TiO2, respectively. This enhanced photocatalytic performance can be attributed to the synergetic effect of slow photons near the absorption edge of anatase TiO2 nanocrystals and chemically amplified photochemistry. The present method is much more simple and straightforward than conventional colloidal crystal templating methods. In particular, the gold nanoparticles can be in situ loaded into the inverse opal structure with controllable size and content. Furthermore, both i-TiO2-o and i-Au-TiO2-o films fabricated by this method show a highly ordered structure without overlayers in a large area, which facilitates the adsorption of target pollutants and ultimate utilization of solar energy.
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Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 30 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 24 Dec 2013, 10:15:04 EST by System User on behalf of School of Chemical Engineering