[22a-P4-1~27] 6.3 Oxide electronics

▼ [22a-P4-2] One-pot room temperature synthesis of yellow-orange TiO2: high photocatalytic activity
under visible light

〇(M2)Yufeng Wang¹, Shintaro Takahashi¹, Ken-ichi Saitow^2,1 (1.Graduate school of science, Hiroshima Univ., 2.N-BARD, Hiroshima Univ.)

Keywords:TiO2 photocatalyst,milling,doping

Titanium dioxide (TiO2) has been the most popular photocatalyst and is used for the degradation of organic pollutants, self-cleaning, and water-splitting reaction. TiO2 photocatalyst is activated by UV light due to its wide band gap (3.2 eV, λ ≤ 387.5 nm). Visible-light activated TiO2 has attracted much attention using metal-ion or non-metal doping. However, almost all synthesis methods have required specific experimental conditions, such as ion-implantation facilities, vacuum, and high temperatures up to 400-800 °C for several hours. High-energy ball milling has attracted considerable attention as a physical synthesis method , because large amount of particles can be easily obtained by simply grinding solid materials in a milling vessel with milling balls, i.e., one-pot facile synthesis at room temperature.