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Electron beam induced rapid crystallization of water splitting nanostructures

Published online by Cambridge University Press:  21 December 2015

Nitul S. Rajput ,
Sang-Gook Kim ,
Jeffrey B. Chou ,
Jehad Abed ,
Jaime Viegas  and
Mustapha Jouiad
Nitul S. Rajput
Affiliation:
Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE
Sang-Gook Kim
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
Jeffrey B. Chou
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
Jehad Abed
Affiliation:
Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE
Jaime Viegas
Affiliation:
Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE
Mustapha Jouiad*
Affiliation:
Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE
*
*(Email: mjouiad@masdar.ac.ae)
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Abstract

Titanium dioxide (TiO2) loaded with gold (Au) as noble metal, acts as an efficient photocatalyst that has been extensively investigated for water splitting processes. In this paper, we report on the microstructure of atomic layer deposited titanium dioxide and the crystallinity modification of the material using energetic electron beam irradiation. A rapid high-energy electron beam induced crystallization of the nanostructures has been observed in-situ inside a High-Resolution Transmission Electron Microscope (HRTEM). The systematic crystallization of the nanomaterial occurring under the electron beam irradiation (300 KV) indicates the transformation of the near amorphous material into a mixture of two nuances of TiO2 polymorphs, namely rutile and anatase. We believe that this transformation will enhance the efficiency of water splitting process, as the mixed phases of rutile and anatase are known to possess better optical properties than the individual polymorphs of TiO2. This finding may be of particular interest in developing appropriate heat treatment methods for these nanostructures dedicated to water splitting to increase their efficiency.

Keywords

atomic layer depositionnanostructureoptical properties
Type
Articles
Information
MRS Advances , Volume 1 , Issue 13: Nanomaterials and Synthesis , 2016 , pp. 825 - 830
Copyright
Copyright © Materials Research Society 2015 

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References

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