The successful application of ion engineering techniques for the development of TiO2 photocatalysts operating under visible and/or solar light irradiations has been summarized in this review article. First, we have physically doped various transition metal ions within a TiO2 lattice on an atomic level by using an advanced metal ion implantation method. The metal ion implanted TiO2 could efficiently work as a photocatalyst under visible light irradiation. Some field tests under solar light irradiation clearly revealed that the Cr or V ions implanted TiO2 samples showed 2–3 times higher photocatalytic reactivity than the un-implanted TiO2. Second, we have developed the visible light responsive TiO2 thin film photocatalyst by a single process using an RF-magnetron sputtering (RF-MS) deposition method. The vis-type TiO2 thin films showed high photocatalytic reactivity for various reactions such as reduction of NOx, degradation of organic compounds, and splitting of H2O under visible and/or solar light irradiations.
Research on Chemical Intermediates – Springer Journals
Published: Feb 18, 2012
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