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 journalArticlepeer-review

    3 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

    • General Chemical Engineering
    • Organic Chemistry
    • Polymers and Plastics
    • Materials Chemistry

    Fingerprint

    Dive into the research topics of 'Simple synthesis of water-dispersible and photoactive titanium dioxide nanoparticles using functionalized poly(ethylene oxide)s'. Together they form a unique fingerprint.

    Cite this