Journal ArticleDOI
Self-Doped Ti3+ Enhanced Photocatalyst for Hydrogen Production under Visible Light
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TLDR
The UV-vis spectra show that the Ti(3+) here extends the photoresponse of TiO(2) from the UV to the visible light region, which leads to high visible-light photocatalytic activity for the generation of hydrogen gas from water.Abstract:
Through a facile one-step combustion method, partially reduced TiO2 has been synthesized. Electron paramagnetic resonance (EPR) spectra confirm the presence of Ti3+ in the bulk of an as-prepared sample. The UV−vis spectra show that the Ti3+ here extends the photoresponse of TiO2 from the UV to the visible light region, which leads to high visible-light photocatalytic activity for the generation of hydrogen gas from water. It is worth noting that the Ti3+ sites in the sample are highly stable in air or water under irradiation and the photocatalyst can be repeatedly used without degradation in the activity.read more
Citations
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Journal ArticleDOI
Density functional theory study of atomic and electronic properties of defects in reduced anatase TiO2 nanocrystals
Kazuki Morita,Kenji Yasuoka +1 more
TL;DR: In this paper, density functional theory was used to investigate the properties of reduced anatase TiO2 nanocrystals, and it was shown that oxygen vacancies are stable both on the surface and at the sub-surface of the nanocrystal.
Journal ArticleDOI
True Photoreactivity Origin of Ti3+-Doped Anatase TiO2 Crystals with Respectively Dominated Exposed {001}, {101}, and {100} Facets
Xiaogang Liu,Du Guiru,Meng Li +2 more
TL;DR: The true photocatalytic activity origin for the obtained photoreduction and photo-oxidation ability is attributed to the exposure of more active sites (under-coordinated 5-fold Ti atoms), the facilitated charge transfer among {001, {101}, and {100} facets, and the Ti3+ energy state with variable doping levels to extend the visible light response.
Journal ArticleDOI
Defects and interface states related photocatalytic properties in reduced and subsequently nitridized Fe3O4/TiO2
TL;DR: In this article, the Fe3O4@TiO2 catalyst was reduced in a mixed H2/N2 atmosphere at temperatures of 400, 600, 800 and 1000°C in order to produce the oxygen vacancies (Ov) and Ti3+; Simultaneously, Fe 3O4 was reduced to Fe, a strongly magnetic material, beneficial for the magnetic separation after photo-degradation.
Journal ArticleDOI
Enhancing photocatalytic performance of Zn2SnO4 by doping Yb: Oxygen vacancies formation and dye self-sensitization degradation
TL;DR: Zn2SnO4 (ZTO) is a photocatalyst with broad application prospects as mentioned in this paper, and it was modified by doping with the rare earth element ytterbium (Yb).
Journal ArticleDOI
Ab-initio study of hydrogen doping and oxygen vacancy at anatase TiO2 surface
TL;DR: In this paper, the effects of hydrogen doping and oxygen vacancy, both individually and together, on the electronic structure and stability of (001) surface of TiO2 in the anatase phase were investigated.
References
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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.
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.
Journal ArticleDOI
Inorganic Materials as Catalysts for Photochemical Splitting of Water
TL;DR: A review of the known inorganic catalysts with a focus on structure-activity relationships is given in this article, where the first water splitting system based on TiO2 and Pt was proposed by Fujishima and Honda in 1972.
Journal ArticleDOI
Surface Science Studies of the Photoactivation of TiO2New Photochemical Processes
Tracy L. Thompson,John T. Yates +1 more
Journal ArticleDOI
Infrared Absorption of Reduced Rutile Ti O 2 Single Crystals
TL;DR: In this paper, the infrared absorption of a series of plane parallel plates having electrical resistivities ranging from 3 to 0.01 ohm-m has been examined and it is postulated that the electrical conductivity arises from the ionization of either one or two trapped electrons from each oxygen vacancy.
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