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Enhancing Visible Light Photocatalysis with Hydrogenated Titanium Dioxide for Anti-Fouling Applications

Published online by Cambridge University Press:  10 July 2018

Safa Al Zaim ,
Aikifa Raza ,
Jin You Lu ,
Daniel Choi ,
Nicholas X. Fang  and
TieJun Zhang Open the ORCID record for TieJun Zhang [Opens in a new window]
Safa Al Zaim
Affiliation:
Department of Mechanical and Materials Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, UAE.
Aikifa Raza
Affiliation:
Department of Mechanical and Materials Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, UAE.
Jin You Lu
Affiliation:
Department of Mechanical and Materials Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, UAE.
Daniel Choi
Affiliation:
Department of Mechanical and Materials Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, UAE.
Nicholas X. Fang
Affiliation:
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
TieJun Zhang*
Affiliation:
Department of Mechanical and Materials Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, UAE.
*
*Correspondence: tiejun.zhang@ku.ac.ae
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Abstract

Anti-organic fouling performance of titanium dioxide (TiO2) can be enhanced by extending its light absorption and photocatalytic capability from ultra-violet to the visible range through hydrogenation. In this work, we aim at studying the impact of hydrogenation on the performance of both electron beam-deposited TiO2 thin films and hydrothermally grown TiO2 nanostructures on titanium substrates. Hydrogenation of these TiO2-deposited titanium substrates (TiO2/Ti) are achieved in relatively low-temperature low-pressure chemical vapor deposition chamber without any noble diatomic hydrogen dissociation catalyst, such as platinum. Our study shows that these hydrogenated TiO2/Ti have better light absorption ability and the titanium substrate itself serves as the active catalyst for hydrogen dissociation and diffusion. By applying hydrogenation to the TiO2 nanostructures, we can enhance photocatalytic performance by 50% through methylene blue degradation experiments. We have also evaluated the effect of hydrogenation on carrier density and mobility in TiO2/Ti. We recommend the hydrogenation of hydrothermally grown TiO2 nanostructure on titanium substrates for scalable photocatalytic applications.

Keywords

hydrogenationabsorptioncatalyticthin filmnanostructure
Type
Articles
Information
MRS Advances , Volume 3 , Issue 53: Energy Materials and Technologies , 2018 , pp. 3181 - 3187
Copyright
Copyright © Materials Research Society 2018 

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