Journal ArticleDOI
Tailored TiO2-SrTiO3 heterostructure nanotube arrays for improved photoelectrochemical performance.
TLDR
The results presented here provide a convenient way to tailor the photoelectrochemical properties of TiO(2)-SrTiO(3) nanotube array electrodes and employ them for dye- or quantum-dot-sensitized solar cells and/or photocatalytic hydrogen production.Abstract:
TiO2 nanotube arrays formed on Ti substrate by electrochemical anodization have been converted into TiO2−SrTiO3 heterostructures by controlled substitution of Sr under hydrothermal conditions. The growth of SrTiO3 crystallites on the nanotube array electrode was probed by electron microscopy and X-ray diffraction. As the degree of Sr substitution increases with the duration of hydrothermal treatment, an increase in the size of SrTiO3 crystallites was observed. Consequently, with increasing SrTiO3 fraction in the TiO2−SrTiO3 nanotube arrays, we observed a shift in the flat band potential to more negative potentials, thus confirming the influence of SrTiO3 in the modification of the photoelectrochemical properties. The TiO2−SrTiO3 composite heterostructures obtained with 1 h or less hydrothermal treatment exhibit the best photoelectrochemical performance with nearly 100% increase in external quantum efficiency at 360 nm. The results presented here provide a convenient way to tailor the photoelectrochemical ...read more
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Journal ArticleDOI
Inorganic nanostructures for photoelectrochemical and photocatalytic water splitting
TL;DR: The current state of research on nanoscale-enhanced photoelectrodes and photocatalysts for the water splitting reaction with special emphasis of Fe(2)O(3) with an outlook on the challenges in solar fuel generation with nanoscales inorganic materials is reviewed.
Journal ArticleDOI
Semiconductor Composites: Strategies for Enhancing Charge Carrier Separation to Improve Photocatalytic Activity
TL;DR: The formation of semiconductor composites comprising multicomponent or multiphase heterojunctions is a very effective strategy to design highly active photocatalyst systems as discussed by the authors, and a review summarizes the recent strategies to develop such composites, and highlights the most recent developments in the literature.
Journal ArticleDOI
Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review
Jiangtian Li,Nianqiang Wu +1 more
TL;DR: In this paper, the authors describe the barrier, progress and future direction of research on the correlation of the chemical constituent, size, dimensionality, architecture, crystal structure, microstructure and electronic band structure of photocatalysts (or photoelectrodes) with five vital processes including light absorption, charge separation, migration and recombination as well as surface redox reactions.
Journal ArticleDOI
Beyond Photovoltaics: Semiconductor Nanoarchitectures for Liquid-Junction Solar Cells
TL;DR: One-Dimensional (1-D) Transport Architectures 6675 4.2.1.
Journal ArticleDOI
State‐of‐the‐Art Progress in Diverse Heterostructured Photocatalysts toward Promoting Photocatalytic Performance
TL;DR: In this paper, the state-of-the-art progress of semiconductor/semiconductor heterostructured photocatalysts with diverse models, including type-I and type-II heterojunctions, Z-scheme system, p-n heterojunction, and homojunction band alignments, were explored for effective improvement of photocatalysis activity through increase of the visible-light absorption, promotion of separation, and transportation of the photoinduced charge carries.
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
Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides
TL;DR: Film and powders of TiO2-x Nx have revealed an improvement over titanium dioxide (TiO2) under visible light in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface.
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Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications
Xiaobo Chen,Samuel S. Mao +1 more
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Powering the planet: Chemical challenges in solar energy utilization
Nathan S. Lewis,Daniel G. Nocera +1 more
TL;DR: Solar energy is by far the largest exploitable resource, providing more energy in 1 hour to the earth than all of the energy consumed by humans in an entire year, and if solar energy is to be a major primary energy source, it must be stored and dispatched on demand to the end user.
Journal ArticleDOI
Efficient photochemical water splitting by a chemically modified n-TiO2.
TL;DR: A chemically modified n-type TiO2 is synthesized by controlled combustion of Ti metal in a natural gas flame and performs water splitting with a total conversion efficiency of 11% and a maximum photoconversion efficiency of 8.35% when illuminated at 40 milliwatts per square centimeter.
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