Photochemical Mechanism of Size-Quantized Vanadium-Doped TiO2 Particles

Martin, Scot T.; Morrison, Colin L.; Hoffmann, Michael R.

doi:10.1021/j100102a041

Cited by 331 publications

(208 citation statements)

References 17 publications

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“…[32] These bands are observed in the spectra recorded up to 800 °C, and all of them disappear at high temperature, which could be attributed to the crystallization of the rutile phase.…”

Section: Resultsmentioning

confidence: 91%

Sol–Gel Synthesis of Tunable Cerium Titanate Materials

et al. 2008

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Cerium titanate structures present a high technological interest because of their optical and catalytic properties. This work reports the synthesis of these materials by a sol–gel methodology that allows mixed oxides with TiIV/CeIII, TiIV/CeIV or TiIV/CeIII–CeIV species to be obtained. Crystallization of CeO2–TiO2 mixed oxides and Ce2Ti2O7 pyrochlore phase was corroborated by XRD and Raman spectroscopy. Magnetic and EPR measurements were performed in order to clarify the oxidation state of the cerium ions in the system as a result of the easy oxidation of CeIII. The firing atmosphere is crucial for the CeIII/CeIV ratio, which is responsible for the different structure, but it also affects the colouration (yellow, green, brown). This methodology offers the possibility to modulate the Ce3+/Ce4+ content and particle sizes providing more ecological coloured pigments based on rare earth elements that could be interesting materials for advanced applications in catalysis.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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“…[32] These bands are observed in the spectra recorded up to 800 °C, and all of them disappear at high temperature, which could be attributed to the crystallization of the rutile phase.…”

Section: Resultsmentioning

confidence: 91%

Sol–Gel Synthesis of Tunable Cerium Titanate Materials

et al. 2008

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“…In addition, a number of experiments have been carried out to investigate the photocatalytic efficiency of V-doped TiO 2 . For example, Martien et al reported reduced photoreactivity in TiO 2 doped with V 5+ via co-precipitation [15], while Choi et al pointed out that V 4+ -doped TiO 2 increased photoreactivity [16]. Recent reports from Klosek et al also indicate that V 4+ -doped TiO 2 is quite active under visible-light irradiation [17].…”

Section: Introductionmentioning

confidence: 99%

First‐principles calculation of electronic structure of V‐doped anatase TiO₂

Long

English

2010

ChemPhysChem

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The energetic and electronic structures of V‐doped anatase TiO2 have been investigated systematically by the GGA+U approach, including replacement of Ti by V in the absence and presence of oxygen vacancies and the presence of an interstitial site. It was found that V should exist as a V4+ ion in the replacement of Ti in the anatase lattice, the electron transitions of which to the conduction band from V 3d states are responsible for the experimentally observed visible light absorption. The influence of V dopant concentration on the electronic and magnetic properties is also discussed, such as the influence of the U value in systems containing oxygen vacancies and spin flip phenomena for interstitial V‐doping.

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“…For excitation, ultraviolet light with a wavelength below 350 nm is used. This light is absorbed by titanium dioxide via resonance absorption with a high cross-section; ultraviolet light with wavelengths of more than 350 nm is reflected by titanium dioxide particles or emitted in the form of light at longer wavelengths (Martin et al 1994). …”

Section: Photocatalytic Properties Of Titanium Dioxidementioning

confidence: 99%

“…As a result, the resonance absorption is interrupted and the energy released on recombination is emitted in the form of light at wavelengths in the neighbouring longer wavelength spectrum (Martin et al 1994). Non-exponential decay curves can be produced as different states of stimulation with different half-lives are passed through during decay.…”

Section: Photocatalytic Properties Of Titanium Dioxidementioning

confidence: 99%

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Titanium dioxide (respirable fraction) [MAK Value Documentation, 2009]

2014

The MAK‐Collection for Occupational Health and Safety

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Published in the series Occupational Toxicants , 2014 The article contains sections titled: Toxic Effects and Mode of Action Mechanism of Action Toxicokinetics and Metabolism Absorption, distribution, elimination Metabolism Effects in Humans Single exposures Repeated exposure Local effects on skin and mucous membranes Allergenic effects Reproductive toxicity Genotoxicity Carcinogenicity Animal Experiments and in vitro Studies Acute toxicity Subacute, subchronic and chronic toxicity Local effects on skin and mucous membranes Allergenic effects Reproductive toxicity Genotoxicity Carcinogenicity Other effects Manifesto (MAK value/characterization)

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Photochemical Mechanism of Size-Quantized Vanadium-Doped TiO2 Particles

Cited by 331 publications

References 17 publications

Sol–Gel Synthesis of Tunable Cerium Titanate Materials

Sol–Gel Synthesis of Tunable Cerium Titanate Materials

First‐principles calculation of electronic structure of V‐doped anatase TiO₂

Titanium dioxide (respirable fraction) [MAK Value Documentation, 2009]

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Photochemical Mechanism of Size-Quantized Vanadium-Doped TiO2 Particles

Cited by 331 publications

References 17 publications

Sol–Gel Synthesis of Tunable Cerium Titanate Materials

Sol–Gel Synthesis of Tunable Cerium Titanate Materials

First‐principles calculation of electronic structure of V‐doped anatase TiO2

Titanium dioxide (respirable fraction) [MAK Value Documentation, 2009]

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First‐principles calculation of electronic structure of V‐doped anatase TiO₂