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Umebayashi, Tsutomu; Yamaki, Tetsuya; Tanaka, Shigeru; Asai, Keisuke*
Chemistry Letters, 32(4), p.330 - 331, 2003/04
Times Cited Count：501 Percentile：99.17(Chemistry, Multidisciplinary)A sulfur (S)-doped titanium dioxide (TiO) photocatalyst was synthesized by oxidative annealing of titanium disulfide (TiS). TiS turned into anatase TiO when annealed in air. The residual S atoms occupied O-atom sites in the TiO to form Ti-S bonds. The S doping caused the absorption edge of TiO to be shifted into the lower energy region. Consequently, methylene blue adsorbed on the S-doped TiO was photocatalytic decomposed by visible light irradiation.
Syarif, D. G.; Miyashita, Atsumi; Yamaki, Tetsuya; Sumita, Taishi*; Choi, Y.; Ito, Hisayoshi
Applied Surface Science, 193(1-4), p.287 - 292, 2002/06
Times Cited Count：91 Percentile：93.63(Chemistry, Physical)Titanium dioxide (
) films on glass substrates were prepared by pulsed laser deposition (PLD) technique. The dependence of crystal structure, morphology and photocatalytic activity on oxygen partial pressure were investigated using X-ray diffraction (XRD), Atomic force microscope (AFM) and UV-VIS Spectrophotometer. By increasing oxygen partial pressure, the surface morphology changed from smooth to rough, and the crystal structure changed from rutile to anatase at fixed substrate temperature of 773 K. The change of the surface morphology and the formation of anatase structure by variation of oxygen partial pressure resulted in an increase of photocatalytic activity.
