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

    Research output: Contribution to journalArticle

    202 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)3554-3563
    Number of pages10
    JournalAdvanced Functional Materials
    Volume21
    Issue number18
    DOIs
    Publication statusPublished - 2011 Sep 23

    Keywords

    • active facets
    • nanocuboids
    • photocatalysis
    • shape-controlled synthesis
    • titanium dioxide

    ASJC Scopus subject areas

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

    Fingerprint Dive into the research topics of 'Shape- and size-controlled synthesis of uniform anatase TiO<sub>2</sub> nanocuboids enclosed by active {100} and {001} facets'. Together they form a unique fingerprint.

  • Cite this