Understanding Formation Mechanism of Titanate Nanowires through Hydrothermal Treatment of Various Ti-Containing Precursors in Basic Solutions

J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (6): 488-494.

• Nanomaterials and Nanotechnology • Previous Articles Next Articles

Understanding Formation Mechanism of Titanate Nanowires through Hydrothermal Treatment of Various Ti-Containing Precursors in Basic Solutions

Jie Xie^1,2), Xiaohui Wang¹⁾, Yanchun Zhou^1,3)

1) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2) Graduate School of Chinese Academy of Sciences, Beijing 100039, China
3) Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China

Received:2011-11-25 Revised:2012-02-02 Online:2012-06-28 Published:2012-07-26
Contact: Yanchun Zhou
Supported by:
K.C. Wang Education Foundation, Hong Kong, China

Abstract

Abstract: Titanate nanowires prepared by hydrothermal treatment of TiO₂ in NaOH solution have attracted intensive attentions, but the formation mechanism is still under debate. Herein, we report an in-depth study on the formation mechanism through investigating the hydrothermal behavior of various Ti-containing precursors in basic solutions, including Ti, TiN, TiO₂, Ti₂SnC and Ti₂AlN. Based on the results by means of X-ray diffraction (XRD), transmission electron microscopy (TEM) and Raman spectroscopy, it is demonstrated that the crystal structure of the hydrothermal products is irrespective to the structure of the precursors or the types of basic solution (NaOH or KOH) in use. Alkali ions play an important role in the formation of titanate nanowires. The formation mechanism of the resultant titanate nanowires was proposed to be dissolution-crystallization mechanism.

Key words: Titanate nanowire , Hydrothermal treatment , Ti-containing precursors , Formation mechanism

Jie Xie, Xiaohui Wang, Yanchun Zhou. Understanding Formation Mechanism of Titanate Nanowires through Hydrothermal Treatment of Various Ti-Containing Precursors in Basic Solutions[J]. J Mater Sci Technol, 2012, 28(6): 488-494.

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Understanding Formation Mechanism of Titanate Nanowires through Hydrothermal Treatment of Various Ti-Containing Precursors in Basic Solutions

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