| Title |
Photocurrent Characteristics of Plasma-Sprayed Semiconductor TiO2 Coatings on Plastic Polymers by Heat Treatment |
| Authors |
강태구(Tae Gu Kang); 이선홍(Seon Hong Lee); 박경채(Kyeung Chae Park) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Plasma Spray; Photocatalytic; N-type semiconductor TiO2; Rapid cooling heat treatment |
| Abstract |
Effects of the photocurrent and photocatalytic activity of the plasma sprayed TiO2 coatings by rapid cooling heat treatment were examined. Thermal deformation of the plasma sprayed plastic polymer substrate was investigated, and the effect of additives for prevent thermal deformation was examined. Fine 20% BiSO4 additive particles, acting as inhibition of the polymer`s movement, were prevent thermal deformation of plastic polymer substrate during rapid cooling after plasma spray. Adhesion area was increased to the partial melt of plastic polymer by plasma spray TiO2 particles. The maximum phocurrent of plasma sprayed TiO2 coatings by rapid cooling was about 20 mA/cm2 and the result of photocatalytic experiments were showed that bacterial ability(elimination rate) was 99.8% by rapid cooling after plasma spray. This phenomenon was caused to formation of n-type semiconductor in large quantifies TiO2 by rapid cooling after plasma spray. |