Journal ArticleDOI
Photocatalytic Activities of Pure Rutile Particles Isolated from TiO2 Powder by Dissolving the Anatase Component in HF Solution
TLDR
In this paper, it was shown that anatase TiO2 dissolves into an HF solution more easily than rutileTiO2, and this property was confirmed by X-ray diffraction patterns and diffuse reflection spectra.Abstract:
We have found that anatase TiO2 dissolves into an HF solution more easily than rutile TiO2. Using this property, we succeeded in isolating pure rutile particles from TiO2 powder consisting of rutile and anatase phases by the HF treatment. The isolation of pure rutile particles was confirmed by X-ray diffraction patterns and diffuse reflection spectra. The rutile particle showed much lower photocatalytic activity than the original powder, if compared for the oxidation of 2-propanol in aqueous solution using dissolved oxygen as the electron acceptor. On the other hand, when Fe(III) ions were used as the electron acceptor for oxidation of 2-propanol and water, the activity scarcely changed after the HF treatment. These results indicate that rutile TiO2 has poor activity for the reduction of oxygen, and the presence of a small amount of an anatase component is crucial for an efficient photocatalytic reaction on TiO2 particles using oxygen as the electron acceptor.read more
Citations
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Journal ArticleDOI
The surface science of titanium dioxide
TL;DR: Titanium dioxide is the most investigated single-crystalline system in the surface science of metal oxides, and the literature on rutile (1.1) and anatase surfaces is reviewed in this paper.
Journal ArticleDOI
Semiconductor-based Photocatalytic Hydrogen Generation
TL;DR: Approaches to Modifying the Electronic Band Structure for Visible-Light Harvesting and its Applications d0 Metal Oxide Photocatalysts 6518 4.4.1.
Journal ArticleDOI
Review of the anatase to rutile phase transformation
TL;DR: 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 article, yielding a plot of the cationic radius versus the valence characterised by a distinct boundary between inhibitors and promoters.
Journal ArticleDOI
A surface science perspective on TiO2 photocatalysis
TL;DR: The field of surface science provides a unique approach to understand bulk, surface and interfacial phenomena occurring during TiO2 photocatalysis as mentioned in this paper, including photon absorption, charge transport and trapping, electron transfer dynamics, adsorbed state, mechanisms, poisons and promoters, and phase and form.
Journal ArticleDOI
Morphology of a TiO2 Photocatalyst (Degussa, P-25) Consisting of Anatase and Rutile Crystalline Phases
TL;DR: In this paper, the authors showed that the anatase and rutile particles separately form their agglomerates and the average sizes of anatase particles are 85 and 25 nm, respectively.
References
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Journal ArticleDOI
Electrochemical and photoelectrochemical investigation of single-crystal anatase
TL;DR: In this article, the electrochemical and photoelectrochemical behavior of a single crystal of anatase was scrutinized for the first time, and it was shown that anatase (101) and rutile (001) electrodes differ mainly in the position of the...
Journal ArticleDOI
A structural investigation of titanium dioxide photocatalysts
Roger I. Bickley,Teresita Gonzalez-Carreno,John S. Lees,John S. Lees,Leonardo Palmisano,Richard J. D. Tilley +5 more
TL;DR: In this article, a study of the structure and the morphology of a titanium dioxide photocatalyst (Degussa P25) reveals multiphasic material consisting of an amorphous state, together with the crystalline phases anatase and rutile in the approximate proportions 80 20.
Journal ArticleDOI
Dynamics of light-induced water cleavage in colloidal systems
TL;DR: In this article, the authors present a Web of Science Record created on 2006-02-21, modified on 2017-05-12, with the purpose of improving the quality of the record.
Journal ArticleDOI
Influence of the preparation methods of titanium dioxide on the photocatalytic degradation of phenol in aqueous dispersion
TL;DR: In this article, commercial and homemade TiO{sub 2} samples were used as photocatalysts to prove that physicochemical features as determined by the origin and preparation methods affect the photocatalysis behavior, in addition to the semiconducting properties.
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