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Issue 4, 2011
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Modified TiO2 nanotube arrays (TNTAs): progressive strategies towards visible light responsive photoanode, a review

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Abstract

Since first introduced by Zwilling and co-workers in 1999, titania nanotube arrays (TNTAs) fabricated by simple electrochemical anodization method have attracted great interest due to their outstanding photoelectrochemical properties which render them the most promising candidate for many solar energy harvesting applications. In this contribution, the fabrication, properties, and applications of TiO2 nanotube arrays have been reviewed, with special focus on synthesis by anodization in fluoride-containing electrolytes. The effect of anodization process parameters such as electric potential, pH, anodization duration and electrolyte composition on the size, and morphology of TNTAs has been discussed in detail. Electronic property modification strategies of the wide band gap TNTAs to enhance the material responsiveness to visible light irradiation have also been reviewed. Modification strategies include nonmetal doping such as nitrogen, carbon, boron and sulfur; metal ion doping such as Fe, Zn, Zr and Cr; surface decoration with precious metal nanoparticles such as Pt, Ag, Au; and sensitization with CdS nanoparticles.

Graphical abstract: Modified TiO2 nanotube arrays (TNTAs): progressive strategies towards visible light responsive photoanode, a review

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Publication details

The article was received on 27 Sep 2010, accepted on 18 Jan 2011 and first published on 17 Feb 2011


Article type: Review Article
DOI: 10.1039/C0EE00488J
Citation: Energy Environ. Sci., 2011,4, 1065-1086
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    Modified TiO2 nanotube arrays (TNTAs): progressive strategies towards visible light responsive photoanode, a review

    A. El Ruby Mohamed and S. Rohani, Energy Environ. Sci., 2011, 4, 1065
    DOI: 10.1039/C0EE00488J

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