Shape- and size-controlled synthesis of uniform anatase TiO2 nanocuboids enclosed by active {100} and {001} facets

Xiaowei Zhao, Wenzui Jin, Jinguang Cai, Jianfeng Ye, Zhenhu Li, Yurong Ma, Jinglin Xie, Limin Qi

    研究成果: Article査読

    210 被引用数 (Scopus)

    抄録

    Uniform anatase TiO2 nanocuboids enclosed by active {100} and {001} facets over a wide size range (60-830 nm in length) with controllable aspect ratios were solvothermally synthesized through hydrolysis of titanium tetraisopropoxide (TTIP) using acetic acid (HAc) as the solvent and the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) as the capping agent. The size and aspect ratio of the anatase TiO2 nanocuboids can be readily adjusted by changing the composition parameters including the contents of [bmim][BF4], water, and HAc in the quaternary solution system. It was revealed that [bmim][BF4] played an important role in stabilizing both the {100} and {001} facets of the anatase TiO2 nanocuboids. On the one hand, [bmim][BF4] acted as a fluoride source to release F- ions for stabilizing the {001} facets; on the other hand, the [bmim]+ ions acted as effective capping ions to preferentially stabilize the {100} facets. The obtained near-monodisperse anatase TiO2 nanocuboids exhibited an interesting self-assembly behavior during deposition. These single-crystalline anatase nanocuboids showed extremely high crystalline phase stability, retaining the pure phase of anatase as well as the morphology even after being calcined at 900 °C. Moreover, the anatase nanocuboids exhibited considerably enhanced photocatalytic activity owing the wholly exposed active {100} and {001} facets.

    本文言語English
    ページ(範囲)3554-3563
    ページ数10
    ジャーナルAdvanced Functional Materials
    21
    18
    DOI
    出版ステータスPublished - 2011 9 23

    ASJC Scopus subject areas

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

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