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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.125  No.3 (March) (2017)  >  pp.168-174

Journal of the Ceramic Society of Japan
<<Previous article Vol.125  No.3 (March) (2017)   pp.168 - 174 Next article>>

Control of the oxidizing and hydrophilicizing properties of photocatalytic TiO2 thin films coated on a polyethylene-terephthalate substrate

Mitsuyoshi MACHIDA1), Keiichiro NORIMOTO1), Masahiro YAMAMOTO1)
1) R & D center, TOTO LTD.

Polyethylene-terephthalate (PET) films coated with photocatalytic TiO2 and silicone as a binder were fabricated and attached to a window pane. A white substance was observed on the surface after exposure for several months in an area with air pollution. The white substance was analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy, ion chromatograph and capillary electrophoresis, and was identified as CaSO4. Although the oxidizing properties of the films were affected by the particle size and the amount of TiO2 in the photocatalytic layer, the hydrophilicizing properties of the films were hardly changed by them. In this study, we found that it was possible to decrease the oxidizing properties of photocatalytic PET films while maintaining the hydrophilicizing properties constant by using small TiO2 particles and controlling the ratio of TiO2/binder.


Keyword:
Titanium dioxide, Photocatalyst, Particle size, Oxidizing property, Hydrophilicizing property

Received: October 04, 2016
Accepted: January 06, 2017 , Published online: March 01, 2017

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