[21a-A307-1~10] 6.3 Oxide electronics

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[21a-A307-8] Photocatalytic Activity of Anatase/Rutile-Mixed Phase TiO₂ Nanoparticles Doped with Carbon Impurities by High-Pressure Annealing

〇(M2)Takumi Matsumoto¹, Retsuo Kawakami¹, Shinichiro Yanagiya^1,2, Masahito Niibe³, Yoshitaka Nakano⁴ (1.Tokushima Univ., 2.pLED, Tokushima Univ., 3.Hyogo Univ., 4.Chubu Univ.)

Keywords:

titanium dioxide photocatalyst,high-pressure annealing,carbon doping from PEG

We focused on polyethylene glycol (PEG) as a carbon source and developed TiO₂ nanoparticles with high photocatalytic activity under visible light irradiation. Last year, we reported that the photodegradability of anatase/rutile mixed crystal TiO₂ nanoparticles (A/R-TiO₂ NPs) improved by about two times after high pressure annealing at a low temperature of 300 ℃ with a PEG mixture ratio of 30%. In the present study, we elucidated the enhancement mechanism of the photocatalytic activity of A/R-TiO₂ NPs annealed with PEG at a low temperature using XPS analysis. In particular, we discuss the carbon impurity doping in TiO₂.