Fabrication of TiO2 Binary Inverse Opals without Overlayers via the Sandwich-Vacuum Infiltration of Precursor

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Title Fabrication of TiO2 Binary Inverse Opals without Overlayers via the Sandwich-Vacuum Infiltration of Precursor
Author Cai, Zhongyu; Teng, Jinghua; Xiong, Zhigang; Li, Yanqiang; Li, Qin; Lu, Xianmao; Zhao, X. S.
Journal Name Langmuir
Year Published 2011
Place of publication United States
Publisher American Chemical Society
Abstract A sandwich-vacuum method was demonstrated for the fabrication of titania (TiO2) binary inverse opals with an open surface. In this method, a moisture-stable TiO2 precursor was backfilled into the interstitial spaces of polystyrene binary colloidal crystals (PS bCCs), which served as a template. Removal of the template by calcination yielded TiO2 binary inverse opals with a 3D-ordered macroporous (3DOM) structure. Optical reflectance spectra revealed the existence of a pseudostop band gap in the 3DOM TiO2 samples. The position of the pseudostop band gap shifted to the low-wavelength region as the number ratio of small over large PS spheres was increased in the template. The sandwich-vacuum method proved to be simple and rapid for the fabrication of TiO2 binary inverse opals without overlayers in large domains. The 3DOM TiO2 materials were used as a photocatalyst for the degradation of benzoic acid. Results showed that in comparison to TiO2 nanoparticles prepared under the same sintering conditions, the 3DOM TiO2 materials displayed enhanced photocatalytic activity.
Peer Reviewed Yes
Published Yes
Alternative URI http://10.1021/la200111j
Copyright Statement Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information.
Volume 27
Issue Number 8
Page from 5157
Page to 5164
ISSN 0743-7463
Date Accessioned 2012-03-29; 2012-05-02T21:54:58Z
Research Centre Queensland Micro and Nanotechnology Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Chemical Engineering
URI http://hdl.handle.net/10072/44767
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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