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Hydrothermally grown TiO2 nanotubes on multi-layered Ti mesh electrodes for enhanced photoelectrochemical reaction

Published online by Cambridge University Press:  26 September 2013

Hyunsu Kim ,
Jirapon Khamwannah ,
Chulmin Choi ,
Yang Shi  and
Sungho Jin
Hyunsu Kim
Affiliation:
Materials Science and Engineering, University of California at San Diego, La Jolla, California 92093
Jirapon Khamwannah
Affiliation:
Materials Science and Engineering, University of California at San Diego, La Jolla, California 92093
Chulmin Choi
Affiliation:
Materials Science and Engineering, University of California at San Diego, La Jolla, California 92093
Yang Shi
Affiliation:
Materials Science and Engineering, University of California at San Diego, La Jolla, California 92093
Sungho Jin*
Affiliation:
Materials Science and Engineering, University of California at San Diego, La Jolla, California 92093
*
*Address all correspondence to Sungho Jin atjin@ucsd.edu
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Abstract

We report here a successful fabrication of three-dimensional (3D) photoelectrodes fully coated with hydrothermally formed TiO2 nanotubes on multi-layered Ti mesh with significantly increased surface area. A near-vertical array of ~8 nm diameter nanotubes of TiO2 was also produced on the metallic surface of folded Ti mesh electrode. The multi-layered mesh was used as a 3D highly conductive electrode, as this architecture intuitively allows for light passage, reflections, and smooth water flow for possible continuous operation of water splitting reaction. By virtue of substantially increased surface area and more efficient light usage, significantly increased photocurrent densities were obtained.

Type
Research Letters
Information
MRS Communications , Volume 3 , Issue 4 , December 2013 , pp. 235 - 240
Copyright
Copyright © Materials Research Society 2013 

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