H. Ichinose et al., PROPERTIES OF ANATASE FILMS FOR PHOTOCATALYST FROM PEROXOTITANIC ACID-SOLUTION AND PEROXO-MODIFIED ANATASE SOL, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 104(10), 1996, pp. 914-917
Anatase films for a photocatalyst have been prepared on substrates by
a dip-coating technique using peroxotitanic acid (PTA) solution and pe
roxo-modified anatase (PA) sol. The as-dried film prepared from PA sol
had already crystallized to anatase phase, while the film prepared fr
om PTA solution crystallized above 300 degrees C. Adhesion strength of
the films at 300 degrees C was over 60 MPa, and their relative densit
y was over 80%. Photocatalytic efficiency of the film prepared from PA
sol for the degradation of acetic acid was higher than that of the fi
lm prepared from PTA solution. The films obtained above 300 degrees C
from PA sol exhibited the highest catalytic activity. However, the fil
m less than 0.70 mu m thick resulted in decrease of photocatalysis.