Journal ArticleDOI
Enhanced photoelectrochemical performance of multi-leg TiO2 nanotubes through efficient light harvesting
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TLDR
In this paper, a model has been presented for light trapping and scattering ability on the basis of the graded refractive index behavior associated with multi-leg nanotubes, leading to a greater scattering of light into the nanotube structure.Abstract:
Multi-leg TiO2 nanotubes have been synthesised by electrochemical anodisation of Ti foils with suitable optimisation of the electrolyte (containing NH4F and HF) composition and concentration. As a result, multi-leg nanotube morphology shows a 4-fold enhancement in photocurrent density compared with that of compact tubes of comparable length under UV-VIS (320–500 nm) light illumination. We attribute this enhancement in photocurrent to efficient light scattering within the multi-leg morphology and the availability of a large contact area with the electrolyte compared to that of compact nanotubes. A model has been presented for light trapping and scattering ability on the basis of the graded refractive index behaviour associated with multi-leg nanotubes. Such graded refractive index behaviour is found to reduce specular reflectance, leading to a greater scattering of light into the nanotube structure. The diffused reflectance spectra confirm higher scattering in the multi-leg nanotube arrays, which indicates greater light harvesting by the multi-leg nanotube arrays.read more
Citations
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Journal ArticleDOI
Optimal engineering of CdS/PbS co-sensitized TiO2 nanotube arrays for enhanced photoelectrochemical performance
TL;DR: In this paper, the impact of the CdS and PbS semiconductor quantum dots (SQDs) on the photoelectrochemical performance (PEC) of TiO2 NTA photoanodes was systematically investigated, and the optimal decoration of the SQDs on the TiO 2 NTA arrays was obtained.
Journal ArticleDOI
Titania nanotubes self-assembled by electrochemical anodization: Semiconducting and electrochemical properties
L. Giorgi,E. Salernitano,Th. Dikonimos Makris,Rossella Giorgi,Enrico Leoni,Maria Luisa Grilli,Nicola Lisi +6 more
TL;DR: In this article, a scan electron microscope equipped with a field emission gun and electrochemical DC/AC techniques was used to characterize the titanium nanotubes (TNT), and the transition from amorphous to crystalline structure of TNT was detected from the change of semiconducting properties.
Journal ArticleDOI
Air–water interface solar heating using titanium gauze coated with reduced TiO 2 nanotubes
Chaorui Xue,Shengliang Hu,Qing Chang,Ning Li,Yanzhong Wang,Wei Liu,Jinlong Yang,Jinlong Yang +7 more
TL;DR: In this paper, a reduced TiO2 nanotubes/Ti gauze was used for air-water interface solar heating, and the results demonstrated that the reduced nanotube/Ti gauge can efficiently accelerate water evaporation.
Journal ArticleDOI
Enhanced Photo-Electrochemical Performance of Reduced Graphene-Oxide Wrapped TiO2 Multi-Leg Nanotubes
Journal ArticleDOI
Large-diameter light-scattering complex multipodal nanotubes with graded refractive index: insights into their formation mechanism and photoelectrochemical performance
TL;DR: In this article, large-diameter multipodal (MP) Ti-Nb-Zr-O nanotubes (NTs) were synthesized using one-step potentiostatic anodization of a Ti−Nb−Zr alloy in a formamide-based electrolyte containing NH4F.
References
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Journal ArticleDOI
Electrochemical Photolysis of Water at a Semiconductor Electrode
Akira Fujishima,Kenichi Honda +1 more
TL;DR: Water photolysis is investigated by exploiting the fact that water is transparent to visible light and cannot be decomposed directly, but only by radiation with wavelengths shorter than 190 nm.
Journal ArticleDOI
TiO2 Photocatalysis: A Historical Overview and Future Prospects
TL;DR: In this paper, the progress of the scientific research on TiO2 photocatalysis as well as its industrial applications are reviewed, and future prospects of this field mainly based on the present authors' work.
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TiO2 nanotubes: synthesis and applications.
TL;DR: This review attempts to cover all aspects, including underlying principles and key functional features of TiO(2), in a comprehensive way and also indicates potential future directions of the field.
Journal ArticleDOI
Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection
J.-Q. Xi,Martin F. Schubert,Jong Kyu Kim,E. Fred Schubert,Minfeng Chen,Shawn-Yu Lin,W. Liu,J. A. Smart +7 more
TL;DR: Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection were used in this paper, where the authors proposed a method to eliminate the reflection in optical thin-films.
Journal ArticleDOI
Enhanced Photocleavage of Water Using Titania Nanotube Arrays
TL;DR: It is demonstrated that the wall thickness and length of the nanotubes can be controlled via anodization bath temperature and this hydrogen generation rate is the highest reported for a titania-based photoelectrochemical cell.
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