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Recent progress in characterization of the core–shell structure of black titania

Published online by Cambridge University Press:  12 March 2019

Mengkun Tian Open the ORCID record for Mengkun Tian [Opens in a new window] ,
Chenze Liu ,
Jingxuan Ge ,
David Geohegan ,
Gerd Duscher  and
Gyula Eres
Mengkun Tian*
Affiliation:
Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA; and Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, Georgia 30318, USA
Chenze Liu
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
Jingxuan Ge
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
David Geohegan
Affiliation:
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
Gerd Duscher
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA; and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
Gyula Eres*
Affiliation:
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA; and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
*
a)Address all correspondence to these authors. e-mail: mtian37@gatech.edu
b)e-mail: eresg@ornl.gov
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Abstract

The recent observation of spectacular photocatalytic activity enhancements generated tremendous interest in the synthesis, properties, and potential applications of black titania. Most black titania are core–shell structures consisting of a perfect crystalline core surrounded by a defective surface shell. Because the properties are attributed to the defective shell, it is particularly important, but very challenging, to obtain atomic structure information of the core, the shell, and the core–shell relationship on a single particle level. While the role of various synthesis approaches for producing black titania with different properties has been extensively reviewed, this review focuses on understanding the structure–functionality relationship in black titania on a single particle level. We start by introducing the crystal and electronic band structure of different TiO2 phases, followed by the discussion of particle size effects, the origin of lattice distortions, and phase control by synthesis, and concluding with the discussion of crystalline order formation and evolution creating the defective shell.

Keywords

black titaniacore–shell structureatomic structurelattice distortionoxygen vacanciesinterstitial Ti3+nanoparticlessizephase
Type
REVIEW
Information
Journal of Materials Research , Volume 34 , Issue 7: Focus Section: Interconnects and Interfaces in Energy Conversion Materials , 15 April 2019 , pp. 1138 - 1153
Copyright
Copyright © Materials Research Society 2019 

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Footnotes

c)

These authors contributed equally to this work.

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

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