A TiO2 film electrode (photoanode) was prepared by blending commercial TiO2 powder (Degussa, P25) of ca
0.2 g, nitric solution (0.1 M) of 0.4 ml, polyethylene glycol
(MW10,000) of ca. 0.08 g and one drop of a nonionic surfactant, Triton X-100. The mixture was well mixed using an ultrasonic bath for 1 h and then the resultant paste
was spread over a conductive glass plate having 15 O=cm2
which was purchased from Hartford Glass Co., Inc. The
coated plate was then sintered at 450 C for 2 h. The dyes
were attached to the TiO2 surface by immersing the coated
electrodes in the aqueous solution of each dye for 24 h. The
non-adsorbed dye was washed up with anhydrous ethanol.
Pt counter electrode was prepared by deposition of Pt-
catalyst T/SP paste (purchased from Solaronix SA) on
another conductive glass.