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Vapor-Phase Hydrothermal Transformation of HTiOF3 Intermediates into {001} Faceted Anatase Single-Crystalline Nanosheets

  1. Porun Liu1,
  2. Yun Wang1,
  3. Haimin Zhang1,
  4. Taicheng An2,
  5. Huagui Yang3,
  6. Zhiyong Tang4,
  7. Weiping Cai5,
  8. Huijun Zhao1,*

Article first published online: 20 AUG 2012

DOI: 10.1002/smll.201200971

Issue

Small

Small

Volume 8, Issue 23, pages 3664–3673, December 7, 2012

Additional Information

How to Cite

Liu, P., Wang, Y., Zhang, H., An, T., Yang, H., Tang, Z., Cai, W. and Zhao, H. (2012), Vapor-Phase Hydrothermal Transformation of HTiOF3 Intermediates into {001} Faceted Anatase Single-Crystalline Nanosheets. Small, 8: 3664–3673. doi: 10.1002/smll.201200971

Author Information

  1. 1

    Centre for Clean Environment and Energy, Griffith School of Environment, Griffith University, Queensland 4222, Australia

  2. 2

    State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental, Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, P.R. China

  3. 3

    Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China

  4. 4

    National Centre for Nanoscience and Technology, Beijing 100190, P.R. China

  5. 5

    Key Laboratory of Materials Physics, Hefei Key Laboratory of Nanomaterials and Nanotechnology, Institutes of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P.R. China

*Centre for Clean Environment and Energy, Griffith School of Environment, Griffith University, Queensland 4222, Australia.

Publication History

  1. Issue published online: 3 DEC 2012
  2. Article first published online: 20 AUG 2012
  3. Manuscript Revised: 20 JUN 2012
  4. Manuscript Received: 4 MAY 2012

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Keywords:

  • crystal growth;
  • hydrothermal synthesis;
  • nanostructures;
  • photocatalysis;
  • reaction mechanisms

Abstract

For the first time, a facile, one-pot hydrofluoric acid vapor-phase hydrothermal (HF-VPH) method is demonstrated to directly grow single-crystalline anatase TiO2 nanosheets with 98.2% of exposed {001} faceted surfaces on the Ti substrate via a distinctive two-stage formation mechanism. The first stage produces a new intermediate crystal (orthorhombic HTiOF3) that is transformed into anatase TiO2 nanosheets during the second stage. The findings reveal that the HF-VPH reaction environment is unique and differs remarkably from that of liquid-phase hydrothermal processes. The uniqueness of the HF-VPH conditions can be readily used to effectively control the nanostructure growth.

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