Simple synthesis of water-dispersible and photoactive titanium dioxide nanoparticles using functionalized poly(ethylene oxide)s

Seung Hoon Bahng, Jungahn Kim, Nan Hyun Kwon, Hyung Cheol Kim, Abu Bakkar Siddique, Ho Jung Kang, Jae Yeol Lee, Joohoon Kim, Sehoon Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Versatile and direct synthesis of water-dispersible titanium dioxide (TiO2) nanoparticles in the presence of functionalized poly(ethylene oxide)s (PEO) having carboxylic acid groups is presented. The functionalized PEOs, such as PEO-folate conjugate and PEO-b-poly(maleic acid) (PEO-b-PMAc) as polymeric surfactants, were employed for in situ synthesis of TiO2 nanoparticles through hydrolytic sol-gel process of titanium tetrachloride as a precursor in eco-friendly alcoholic media at a relatively low temperature. Both of the two polymers were found to be very effective for stabilizing TiO 2 nanocrystals, exhibiting not only fairly good photocatalytic activities but also water-dispersible property. The core TiO2 crystallites in the size range of 8∼11 nm could be readily controlled in ethanol at a relatively low reaction temperature (70°C), irrespective of the incipient reaction condition, which showed mixed polymorphs. The TiO 2 nanoparticles consist of a few percentages (<10%) of brookite and mostly anatase phases. This process provides a simple and useful in situ preparative route to obtain water-dispersible TiO2 nanoparticles. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)445-456
Number of pages12
JournalMacromolecular Research
Volume22
Issue number4
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • functionalized poly(ethylene oxide)s
  • photocatalytic activity
  • simple synthesis
  • titanium dioxide nanoparticles

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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