Well-organized meso-macroporous TiO2/SiO2 film derived from amphiphilic rubbery comb copolymer

Harim Jeon, Chang Soo Lee, Rajkumar Patel, Jong Hak Kim

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We report the facile synthesis of a well-organized meso-macroporous TiO2/SiO2 thin film with high porosity and good interconnectivity from a binary mixture (i.e., titania precursor and polymer template). Our process is based on self-assembly of the amphiphilic rubbery comb copolymer, poly(dimethylsiloxane)-g-poly(oxyethylene methacrylate) (PDMS-g-POEM) with titanium tetraisopropoxide (TTIP). SiO2 is self-provided by thermal oxidation of PDMS chains during calcination under air. The selective, preferential interaction between TTIP and the hydrophilic POEM chains was responsible for the formation of well-organized TiO2/SiO2 films, as supported by transmission electron microscopy, scanning electron microscopy, X-ray photospectroscopy, and X-ray diffraction analyses. We investigated in detail the effect of precursor content, solvent type, and polymer concentration on thin film morphology. Photodegradation of methyl orange by the well-organized meso-macroporous TiO2/SiO2 film was greater than that of a dense TiO2 film prepared without PDMS-g-POEM as well as a SiO2-etched TiO2 film. These results indicate that the well-organized structure and SiO2 doping of the TiO2 film play a pivotal role in enhancing its photocatalytic properties.

Original languageEnglish
Pages (from-to)7767-7775
Number of pages9
JournalACS Applied Materials and Interfaces
Volume7
Issue number14
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

Copolymers
Methacrylates
Titanium
Polydimethylsiloxane
Polymers
Thin films
Photodegradation
Binary mixtures
Calcination
Self assembly
Porosity
Doping (additives)
TiO2-SiO2
Transmission electron microscopy
X ray diffraction
X rays
Oxidation
Scanning electron microscopy
Air
titanium isopropoxide

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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title = "Well-organized meso-macroporous TiO2/SiO2 film derived from amphiphilic rubbery comb copolymer",
abstract = "We report the facile synthesis of a well-organized meso-macroporous TiO2/SiO2 thin film with high porosity and good interconnectivity from a binary mixture (i.e., titania precursor and polymer template). Our process is based on self-assembly of the amphiphilic rubbery comb copolymer, poly(dimethylsiloxane)-g-poly(oxyethylene methacrylate) (PDMS-g-POEM) with titanium tetraisopropoxide (TTIP). SiO2 is self-provided by thermal oxidation of PDMS chains during calcination under air. The selective, preferential interaction between TTIP and the hydrophilic POEM chains was responsible for the formation of well-organized TiO2/SiO2 films, as supported by transmission electron microscopy, scanning electron microscopy, X-ray photospectroscopy, and X-ray diffraction analyses. We investigated in detail the effect of precursor content, solvent type, and polymer concentration on thin film morphology. Photodegradation of methyl orange by the well-organized meso-macroporous TiO2/SiO2 film was greater than that of a dense TiO2 film prepared without PDMS-g-POEM as well as a SiO2-etched TiO2 film. These results indicate that the well-organized structure and SiO2 doping of the TiO2 film play a pivotal role in enhancing its photocatalytic properties.",
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Well-organized meso-macroporous TiO2/SiO2 film derived from amphiphilic rubbery comb copolymer. / Jeon, Harim; Lee, Chang Soo; Patel, Rajkumar; Kim, Jong Hak.

In: ACS Applied Materials and Interfaces, Vol. 7, No. 14, 01.01.2015, p. 7767-7775.

Research output: Contribution to journalArticle

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