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Synthesis of TiO2@C core–shell nanostructures with various crystal structures by hydrothermal and postheat treatments

Published online by Cambridge University Press:  29 August 2012

Quanjun Li ,
Ran Liu ,
Bo Liu ,
Dongmei Li ,
Bo Zou ,
Tian Cui  and
Bingbing Liu
Quanjun Li
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Ran Liu
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Bo Liu
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Dongmei Li
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Bo Zou
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Tian Cui
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Bingbing Liu*
Affiliation:
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

TiO2@C core–shell nanostructures with various crystal structures of TiO2-B, anatase, and rutile were successfully synthesized by a simple hydrothermal process and postheat treatments. As-synthesized precursor hydrogen titanate@carbonaceous nanoribbons transformed into TiO2-B@C nanoribbons at 400 °C and further transformed into anatase and rutile TiO2@C nanoribbons at 700 and 800 °C, respectively. The morphology of nanoribbons can be retained up to 800 °C. The transformation temperature (800 °C) from anatase to rutile phase is lower than that of TiO2 nanofibers without carbon layers and anatase TiO2@C nanoparticles. These results show that the carbon shell plays important roles in promoting the phase transition from anatase to rutile phase and protecting the nanoribbon-like morphology. The formation mechanism of the TiO2@C core–shell nanostructures with various crystal structures was discussed.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 3: Focus Issue: Titanium Dioxide Nanomaterials , 14 February 2013 , pp. 449 - 453
Copyright
Copyright © Materials Research Society 2012

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