Preparation of water-dispersible TiO2 nanoparticles from titanium tetrachloride using urea hydrogen peroxide as an oxygen donor

Naoko Watanabe, Taichi Kaneko, Yuko Uchimaru, Sayaka Yanagida, Atsuo Yasumori, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    TiO2 nanoparticles were prepared from titanium tetrachloride (TiCl4) in CH2Cl2 at 80 °C for 30 h, 42 h and 70 h using urea hydrogen peroxide (UHP) as an oxygen donor with a TiCl 4: UHP molar ratio of 1 : 2. The XRD patterns and Raman spectroscopy results showed that the products consisted of anatase TiO2. IR and solid-state 13C NMR with cross polarization and magic angle spinning techniques revealed the presence of urea. TEM observation revealed that the products prepared by the reactions for 30 and 42 h consisted of water-dispersible spheroid nanoparticles with a long axis of ~5 nm, while an aggregation of nanoparticles was evident upon reaction for 70 h. Thermogravimetry, inductively-coupled plasma emission spectrometry and CHN analysis showed that the amount of urea increases in the following order: TiO2-42h, TiO2-70h, TiO2-30h. The photocatalytic activity of the products dispersible in water (TiO 2-30h and TiO2-42h) was estimated based on the degradation behaviour of methylene blue, and TiO2-42h showed higher photocatalytic activity than TiO2-30h. It is proposed that TiCl 4 was directly oxidized by UHP to form anatase TiO2 in the early stage of the process.

    Original languageEnglish
    Pages (from-to)10533-10540
    Number of pages8
    JournalCrystEngComm
    Volume15
    Issue number48
    DOIs
    Publication statusPublished - 2013 Dec 28

    Fingerprint

    tetrachlorides
    hydrogen peroxide
    ureas
    Hydrogen peroxide
    Urea
    Hydrogen Peroxide
    titanium
    Titanium
    Oxygen
    Nanoparticles
    nanoparticles
    preparation
    Water
    oxygen
    water
    anatase
    Titanium dioxide
    products
    Magic angle spinning
    Methylene Blue

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

    Cite this

    Preparation of water-dispersible TiO2 nanoparticles from titanium tetrachloride using urea hydrogen peroxide as an oxygen donor. / Watanabe, Naoko; Kaneko, Taichi; Uchimaru, Yuko; Yanagida, Sayaka; Yasumori, Atsuo; Sugahara, Yoshiyuki.

    In: CrystEngComm, Vol. 15, No. 48, 28.12.2013, p. 10533-10540.

    Research output: Contribution to journalArticle

    Watanabe, Naoko ; Kaneko, Taichi ; Uchimaru, Yuko ; Yanagida, Sayaka ; Yasumori, Atsuo ; Sugahara, Yoshiyuki. / Preparation of water-dispersible TiO2 nanoparticles from titanium tetrachloride using urea hydrogen peroxide as an oxygen donor. In: CrystEngComm. 2013 ; Vol. 15, No. 48. pp. 10533-10540.
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