Preparation of nitrogen-substituted Ti[O.sub.2] thin film photocatalysts by the radio frequency magnetron sputtering deposition method and their photocatalytic reactivity under visible light irradiation

Article Abstract:

Nitrogen-substituted Ti[O.sub.2] (N-Ti[O.sub.2]) thin film photocatalysts are prepared by the radio frequency magnetron sputtering (RF-MS) deposition method by using a [N.sub.2]/Ar mixture sputtering gas and the effect of the concentration of substituted nitrogen on the characteristics of the N-Ti[O.sub.2] thin films is investigated. The results have confirmed that these thin films remain thermodynamically and mechanically stable even under heat treatment at 673 K. The high substitution of O atoms of Ti[O.sub.2] with the N atoms plays a main role in the band gap narrowing of the thin films.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Thin Film Materials, Thin films, Optical properties, Dielectric films, Chemical properties

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Charge transport properties in dye-sensitized nanostructured TiO2 thin film electrodes studied by photoinduced current transients

Article Abstract:

A study on the use of dye-sensitized nanostructured titanium dioxide for solar cell applications was conducted to investigate the charge transport in TiO2 as a function of film thickness using time resolved laser pulse-induced photocurrents. The dependence of electrolyte, light intensity and potential were also studied and simulations of a diffusion model were conducted. Results of the experiment are discussed.

Charge transfer, Electron donor-acceptor complexes, Excited state chemistry

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Photoelectrochemical study of nitrogen-doped titanium dioxide for water oxidation

Article Abstract:

The photoelectrochemical response in aqueous electrolyte of nitrogen-doped titanium dioxide, TiO(sub 2-x)Nx, are described. Thin film electrodes were prepared by reactive DC magnetron sputtering in an environment of Ar, O2, and N2.

Photochemical research, Aqueous solution reactions

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