[20a-B204-1~11] 6.3 Oxide electronics

△ [20a-B204-10] Polyethylene Glycol Doping Effects on Photocatalytic Activity of Anatase/Rutile-Mixed Phase TiO₂ Nanoparticles

〇(M1)Takumi Matsumoto¹, Retsuo Kawakami¹, Shin-ichiro Yanagiya^1,2, Masahito Niibe³, Yoshitaka Nakano⁴, Takashi Mukai⁵ (1.Tokushima Univ., 2.pLED, Tokushima Univ., 3.Hyogo Univ., 4.Chubu Univ., 5.Nichia Corp.)

Keywords:photocatalyst, titanium dioxide, polyethylene glycol

We report the photocatalytic activity of polyethylene glycol (PEG)-doped anatase/rutile-mixed phase TiO₂ nanoparticles (A/R-TiO₂ NPs) under visible light irradiation. The samples were prepared by mixing differing mixing amounts of PEG and A/R-TiO₂ NPs and heating them at various temperatures for 1 h. The sample color predominantly changed from white color to black color as the temperature increased to 300 ℃. The photocatalytic activity of PEG-doped A/R-TiO₂ NPs mixed at a mixing ratio of 30% and heated at 300 ℃ was greater than that of A/R-TiO₂ NPs. This enhancement would be related to the large optical absorption and the bandgap narrowing effect due to the PEG doping.