A versatile approach to the fabrication of TiO 2 nanostructures with reverse morphology and mesoporous Ag/TiO 2 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

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Hybrid titanium dioxide (TiO 2 ) 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) via spin-coating common solutions of BCP and inorganic precursors. TiO 2 nanostructures with two extreme reverse morphologies, i.e., TiO 2 dot-in-PS matrix and PS dot-in-TiO 2 matrix, were obtained by increasing the volumetric ratio of the TiO 2 sol-gel precursor from 10 to 50 vol%. Incorporation of silver nitrate into the TiO 2 matrix afforded a hybrid Ag/TiO 2 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/TiO 2 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).

Original languageEnglish
Pages (from-to)7245-7250
Number of pages6
JournalJournal of Materials Chemistry
Volume19
Issue number39
DOIs
Publication statusPublished - 2009 Oct 15

Fingerprint

Polyethylene oxides
Self assembly
Sol-gel process
Nanostructures
Fabrication
Thin films
Block copolymers
Sol-gels
Silver Nitrate
Ethylene Oxide
Styrene
Spin coating
X ray scattering
Titanium dioxide
Nitrates
Atomic force microscopy
Ethylene
Silver
Transmission electron microscopy
Oxides

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

Cha, Min Ah ; Shin, Changhak ; Kannaiyan, Dinakaran ; Jang, Yoon Hee ; Kochuveedu, Saji Thomas ; Ryu, Du Yeol ; Kim, Dong Ha. / A versatile approach to the fabrication of TiO 2 nanostructures with reverse morphology and mesoporous Ag/TiO 2 thin films via cooperative PS-b-PEO self-assembly and a sol-gel process In: Journal of Materials Chemistry. 2009 ; Vol. 19, No. 39. pp. 7245-7250.
@article{bbeb9c1961bc4ca390c0a73259e455d0,
title = "A versatile approach to the fabrication of TiO 2 nanostructures with reverse morphology and mesoporous Ag/TiO 2 thin films via cooperative PS-b-PEO self-assembly and a sol-gel process",
abstract = "Hybrid titanium dioxide (TiO 2 ) 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) via spin-coating common solutions of BCP and inorganic precursors. TiO 2 nanostructures with two extreme reverse morphologies, i.e., TiO 2 dot-in-PS matrix and PS dot-in-TiO 2 matrix, were obtained by increasing the volumetric ratio of the TiO 2 sol-gel precursor from 10 to 50 vol{\%}. Incorporation of silver nitrate into the TiO 2 matrix afforded a hybrid Ag/TiO 2 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/TiO 2 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).",
author = "Cha, {Min Ah} and Changhak Shin and Dinakaran Kannaiyan and Jang, {Yoon Hee} and Kochuveedu, {Saji Thomas} and Ryu, {Du Yeol} and Kim, {Dong Ha}",
year = "2009",
month = "10",
day = "15",
doi = "10.1039/b907922j",
language = "English",
volume = "19",
pages = "7245--7250",
journal = "Journal of Materials Chemistry",
issn = "0959-9428",
publisher = "Royal Society of Chemistry",
number = "39",

}

A versatile approach to the fabrication of TiO 2 nanostructures with reverse morphology and mesoporous Ag/TiO 2 thin films via cooperative PS-b-PEO self-assembly and a sol-gel process . / Cha, Min Ah; Shin, Changhak; Kannaiyan, Dinakaran; Jang, Yoon Hee; Kochuveedu, Saji Thomas; Ryu, Du Yeol; Kim, Dong Ha.

In: Journal of Materials Chemistry, Vol. 19, No. 39, 15.10.2009, p. 7245-7250.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A versatile approach to the fabrication of TiO 2 nanostructures with reverse morphology and mesoporous Ag/TiO 2 thin films via cooperative PS-b-PEO self-assembly and a sol-gel process

AU - Cha, Min Ah

AU - Shin, Changhak

AU - Kannaiyan, Dinakaran

AU - Jang, Yoon Hee

AU - Kochuveedu, Saji Thomas

AU - Ryu, Du Yeol

AU - Kim, Dong Ha

PY - 2009/10/15

Y1 - 2009/10/15

N2 - Hybrid titanium dioxide (TiO 2 ) 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) via spin-coating common solutions of BCP and inorganic precursors. TiO 2 nanostructures with two extreme reverse morphologies, i.e., TiO 2 dot-in-PS matrix and PS dot-in-TiO 2 matrix, were obtained by increasing the volumetric ratio of the TiO 2 sol-gel precursor from 10 to 50 vol%. Incorporation of silver nitrate into the TiO 2 matrix afforded a hybrid Ag/TiO 2 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/TiO 2 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).

AB - Hybrid titanium dioxide (TiO 2 ) 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) via spin-coating common solutions of BCP and inorganic precursors. TiO 2 nanostructures with two extreme reverse morphologies, i.e., TiO 2 dot-in-PS matrix and PS dot-in-TiO 2 matrix, were obtained by increasing the volumetric ratio of the TiO 2 sol-gel precursor from 10 to 50 vol%. Incorporation of silver nitrate into the TiO 2 matrix afforded a hybrid Ag/TiO 2 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/TiO 2 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).

UR - http://www.scopus.com/inward/record.url?scp=70349795753&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70349795753&partnerID=8YFLogxK

U2 - 10.1039/b907922j

DO - 10.1039/b907922j

M3 - Article

VL - 19

SP - 7245

EP - 7250

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

IS - 39

ER -