Photo-induced surface charge separation of highly oriented TiO2 anatase and rutile thin films

Sumita, T.; Yamaki, Tetsuya; Yamamoto, S.; Miyashita, Atsumi

doi:10.1016/s0169-4332(02)00614-1

Cited by 95 publications

(59 citation statements)

References 18 publications

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“…This is attributed to a higher density of localised states and consequent surface-adsorbed hydroxyl radicals and slower charge carrier recombination in anatase relative to rutile [58,60,[69][70][71][72], parameters that contribute to improved performance. The higher rate of electron-hole recombination in rutile is considered to result from this material's typically larger grain size [55,73] and its resultant lower capacity to adsorb species [60,74,75].…”

Section: Photocatalytic Effectmentioning

confidence: 99%

Review of the anatase to rutile phase transformation

2010

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Titanium dioxide, TiO 2 , is an important photocatalytic material that exists as two main polymorphs, anatase and rutile. The presence of either or both of these phases impacts on the photocatalytic performance of the material. The present work reviews the anatase to rutile phase transformation. The synthesis and properties of anatase and rutile are examined, followed by a discussion of the thermodynamics of the phase transformation and the factors affecting its observation. A comprehensive analysis of the reported effects of dopants on the anatase to rutile phase transformation and the mechanisms by which these effects are brought about is presented in this review, yielding a plot of the cationic radius versus the valence characterised by a distinct boundary between inhibitors and promoters of the phase transformation. Further, the likely effects of dopant elements, including those for which experimental data are unavailable, on the phase transformation are deduced and presented on the basis of this analysis.

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Section: Photocatalytic Effectmentioning

confidence: 99%

Review of the anatase to rutile phase transformation

2010

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“…10)12) Thus, it is expected that some properties of the oriented TiO 2 can be improved. The oriented TiO 2 has been prepared by various types of processes, 13), 14) and we have reported that the crystallographic orientation in TiO 2 can be controlled using a strong magnetic field.…”

Section: )7)mentioning

confidence: 99%

Texture development in anatase and rutile prepared by slip casting in a strong magnetic field

Suzuki

Uchikoshi

Sakka

2011

J. Ceram. Soc. Japan

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Titania is a very important material for various applications and its properties are expected to be improved by controlling the crystallographic orientation. In this study, we demonstrated that the c-axes of both rutile and anatase were aligned parallel to a magnetic field and we investigated the effect of the orientation on the microstructure development and the effect of the transformation from anatase to rutile on the orientation during heating. When using rutile as the starting material, the c-axis was aligned and the elongated grains were aligned after sintering. When using anatase as the starting material, the c-axis of anatase was aligned parallel to the magnetic field. However, after transformation, the rutile had a tilt and the anisotropic grain growth was suppressed.

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“…TiO 2 thin films have been prepared by variety of deposition techniques such as chemical vapor deposition [7], reactive sputtering [8,9], atomic layer deposition [10], filtered arc deposition [11], pulse laser deposition [12], spray pyrolysis [13,14], and sol-gel method [15][16][17][18][19]. However, in this study we applied another prominent method that is thermal decomposition that used viscous solvent [20].…”

Section: Introductionmentioning

confidence: 99%

TiO₂ Transparent Thin Film for Eliminating Toluene

Ibrahim

Negishi

Masrom

et al. 2012

ISRN Nanotechnology

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TiO 2 nanoparticles undergo a single-phase transition: from amorphous to anatase when calcined at 450• C. It can be noticed from the XRD and AFM results that the particle size of TiO 2 is below 30 nm. Results from viscometer and UV-Vis analysis showed that the film thickness is closely related to the viscosity of dip-coating solutions. It was found that the contact angle for water decreased after being illuminated with UV light at certain periods of time. This indicates that these films exhibit hydrophilic properties that can be used on self-cleaning surfaces and antifogging mirrors. Heterogeneous photocatalytic oxidation allows the oxidation of airborne volatile organic compounds (VOCs) into carbon dioxide and water in the presence of a semiconductor catalyst and UV light source. Titanium dioxide, due to its chemical stability, nontoxicity, and low cost, represents one of the most efficient photocatalysts. Photocatalytic activity of the TiO 2 thin films was evaluated by using toluene and results showed that this film is successful in decomposing toluene.

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Photo-induced surface charge separation of highly oriented TiO2 anatase and rutile thin films

Cited by 95 publications

References 18 publications

Review of the anatase to rutile phase transformation

Review of the anatase to rutile phase transformation

Texture development in anatase and rutile prepared by slip casting in a strong magnetic field

TiO₂ Transparent Thin Film for Eliminating Toluene

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Photo-induced surface charge separation of highly oriented TiO2 anatase and rutile thin films

Cited by 95 publications

References 18 publications

Review of the anatase to rutile phase transformation

Review of the anatase to rutile phase transformation

Texture development in anatase and rutile prepared by slip casting in a strong magnetic field

TiO2 Transparent Thin Film for Eliminating Toluene

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Product

Resources

About

TiO₂ Transparent Thin Film for Eliminating Toluene