Titanium dioxide nanoswords with highly reactive, photocatalytic facets.
Titanium dioxide (TiO(2)) is one of the most widely studied and important materials for catalysis, photovoltaics, and surface science applications, but the ability to consistently control the relative exposure of higher surface energy facets during synthesis remains challenging. Here, we present the repeatable synthesis of highly reactive, rutile {001} or {101} facets on broad, sword-shaped TiO(2) nanostructures rapidly synthesized in minutes. Growth occurs along planes of lower surface energy, repeatedly yielding nanostructures with large, high energy facets. The quantitative photocatalytic reactivity of the nanoswords, demonstrated by the photoreduction of silver, is over an order of magnitude higher than reference low energy TiO(2){110} substrates. Therefore, the higher surface energy dominated TiO(2) nanoswords are ideal structures for characterizing the physicochemical properties of rutile TiO(2), and may be used to enhance a variety of catalytic, optical, and clean-technology applications.
Department of Mechanical Engineering and Berkeley Sensor and Actuator Center 497 Cory Hall, University of California at Berkeley, Berkeley, CA 94720, USA. bdsosnow@me.berkeley.edu
Brian D
BD
Sosnowchik
Heather C
HC
Chiamori
Yong
Y
Ding
Jong-Yoon
JY
Ha
Zhong Lin
ZL
Wang
Liwei
L
Lin