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K. Iino,M. Kitano,M. Takeuchi,M. Matsuoka,M. Anpo 한국물리학회 2006 Current Applied Physics Vol.6 No.6
Advanced ion-beam techniques such as metal ion-implantation, ionized cluster beam (ICB) deposition and RF-magnetron sputtering (RF-MS) deposition were found to enable the development of unique titanium oxide photocatalyst materials which are able to absorb and work not only under UV but also visible or solar light irradiation. Thus prepared visible light-responsive TiO2 act as efficient photocatalysts for the NO decomposition reaction into N2 and O2 as well as the H2 and O2 evolution reaction from water.
Park, H.,Jie, H.,Chae, K.H.,Park, J.K.,Anpo, M.,Lee, D.Y. Elsevier 2008 Current Applied Physics Vol.8 No.6
Anatase-type TiO<SUB>2</SUB> nanopowders less than 10nm in average diameter were synthesized by a chemical vapor synthesis method. The TiO<SUB>2</SUB> nanopowders showed very poor photocatalytic properties, in spite of their large surface area. With subsequent heat treatment of the TiO<SUB>2</SUB> powders, their photocatalytic properties determined by measuring the degradation of 2-propanol were improved at temperatures up to 600<SUP>o</SUP>C and then diminished along with formation of a rutile phase. This improvement in the photocatalytic properties of TiO<SUB>2</SUB> nanopowders was attributed to both a morphology change and a change in the electronic surface characteristics of TiO<SUB>2</SUB> particles during heat treatment.
Park, H.,Neppolian, B.,Jie, H.S.,Ahn, J.P.,Park, J.K.,Anpo, M.,Lee, D.Y. Elsevier 2007 Current Applied Physics Vol.7 No.2
Bimetal incorporated TiO<SUB>2</SUB> photocatalysts (FeZn-TiO<SUB>2</SUB>) prepared by a flame method showed high photocatalytic activity for the degradation of 2-propanol dissolved in water as compared with mono-metal incorporated or unincorporated TiO<SUB>2</SUB>. By using this flame method, parameters such as uniform particle size, crystallinity as well as the anatase and rutile phase ratio (anatase/rutile) could be controlled without calcination of the catalysts at high temperatures, the parameters being important to achieve a high photocatalytic activity. The presence of a small amount of bimetals such as Fe and Zn plays a vital role as a catalyst in the formation of highly crystalline, small and uniform size particles with defined anatase/rutile phase ratio of around 60/40, this being similar to that of P-25 which is well known as a highly active photocatalyst.