Electron beam induced rapid crystallization of water splitting nanostructures

  

Electron beam induced rapid crystallization of water splitting nanostructures

Nitul S. Rajput,Sang-Gook Kim,Jeffrey B. Chou,Jehad Abed,Jaime Viegas and Mustapha Jouiad 

MRS Advances, 

FirstView Articles

a1 Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE

a2 Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA

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.
http://journals.cambridge.org/action/displayAbstract?aid=10079301

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: