A versatile approach to the fabrication of TiO2nanostructures with reverse morphology and mesoporous Ag/TiO2 thin films via cooperative PS-b-PEO self-assembly and a sol-gel process

Min-Ah Cha; Changhak Shin; Dinakaran Kannaiyan; Yoon Hee Jang; Saji Thomas Kochuveedu; Du Yeol Ryu; Dong Ha Kim

doi:10.1039/B907922J

A versatile approach to the fabrication of TiO₂nanostructures with reverse morphology and mesoporous Ag/TiO₂ thin films via cooperative PS-b-PEO self-assembly and a sol-gel process

Min-Ah Cha,^a Changhak Shin,^b Dinakaran Kannaiyan,^a Yoon Hee Jang,^a Saji Thomas Kochuveedu,^a Du Yeol Ryu^b and Dong Ha Kim*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry and Nano Science, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul, Korea
E-mail: dhkim@ewha.ac.kr
Fax: +82-2-3277-3419
Tel: +82-2-3277-4517

^b Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul, Korea
E-mail: dyryu@yonsei.ac.kr
Fax: +82-2-312-6401
Tel: +82-2-2123-5756

Abstract

Hybrid titanium dioxide (TiO₂) nanostructures with engineered morphologies were produced by a simple synthetic approach based on cooperative sol-gel chemistry and self-assembly of amphiphilic poly(styrene-block-ethylene oxide) (PS-b-PEO) block copolymer (BCP) viaspin-coating common solutions of BCP and inorganic precursors. TiO₂nanostructures with two extreme reverse morphologies, i.e., TiO₂ dot-in-PS matrix and PS dot-in-TiO₂ matrix, were obtained by increasing the volumetric ratio of the TiO₂ sol-gel precursor from 10 to 50 vol%. Incorporation of silver nitrate into the TiO₂ matrix afforded a hybrid Ag/TiO₂ thin film with hexagonally packed arrays of PS nanodots. Upon removal of the PS-b-PEO template from the initial hybrid films by UV treatment, inorganic nanostructures having the same lateral morphologies as the initial films were derived. Among the structures investigated, the Ag/TiO₂ mesoporous film exhibited the best photocatalytic performance. The surface/internal morphology and the mechanism of structural evolution were investigated by atomic force microscopy (AFM), transmission electron microscopy (TEM), and grazing-incidence small-angle X-ray scattering (GISAXS).

Supplementary files

Publication details

The article was received on 20 Apr 2009, accepted on 29 Jul 2009 and first published on 25 Aug 2009

Article type: Paper

DOI: 10.1039/B907922J

Citation: J. Mater. Chem., 2009,19, 7245-7250

Request permissions
A versatile approach to the fabrication of TiO₂nanostructures with reverse morphology and mesoporous Ag/TiO₂ thin films via cooperative PS-b-PEO self-assembly and a sol-gel process

M. Cha, C. Shin, D. Kannaiyan, Y. H. Jang, S. T. Kochuveedu, D. Y. Ryu and D. H. Kim, J. Mater. Chem., 2009, 19, 7245
DOI: 10.1039/B907922J
If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using RightsLink. Go to our Instructions for using RightsLink page for details.

Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement is given with the reproduced material.

Reproduced material should be attributed as follows:
For reproduction of material from NJC:
Reproduced from Ref. XX with permission from the Centre National de la Recherche Scientifique (CNRS) and The Royal Society of Chemistry.

For reproduction of material from PCCP:
Reproduced from Ref. XX with permission from the PCCP Owner Societies.

For reproduction of material from PPS:
Reproduced from Ref. XX with permission from the European Society for Photobiology, the European Photochemistry Association, and The Royal Society of Chemistry.

For reproduction of material from all other RSC journals and books:
Reproduced from Ref. XX with permission from The Royal Society of Chemistry.
If the material has been adapted instead of reproduced from the original RSC publication "Reproduced from" can be substituted with "Adapted from".

In all cases the Ref. XX is the XXth reference in the list of references.

If you are the author of this article you do not need to formally request permission to reproduce figures, diagrams etc. contained in this article in third party publications or in a thesis or dissertation provided that the correct acknowledgement is given with the reproduced material.

Reproduced material should be attributed as follows:
For reproduction of material from NJC:
[Original citation] - Reproduced by permission of The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC

For reproduction of material from PCCP:
[Original citation] - Reproduced by permission of the PCCP Owner Societies

For reproduction of material from PPS:
[Original citation] - Reproduced by permission of The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC

For reproduction of material from all other RSC journals:
[Original citation] - Reproduced by permission of The Royal Society of Chemistry
If you are the author of this article you still need to obtain permission to reproduce the whole article in a third party publication with the exception of reproduction of the whole article in a thesis or dissertation.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Journal of Materials Chemistry

A versatile approach to the fabrication of TiO₂nanostructures with reverse morphology and mesoporous Ag/TiO₂ thin films via cooperative PS-b-PEO self-assembly and a sol-gel process

Abstract

Supplementary files

Publication details

A versatile approach to the fabrication of TiO₂nanostructures with reverse morphology and mesoporous Ag/TiO₂ thin films via cooperative PS-b-PEO self-assembly and a sol-gel process

Search articles by author

Spotlight

Advertisements