TiO2-mounted activated carbon prepared by heating
to 700 ◦C (anatase phase) and P-25 also were repeatedly
used in the same concentration of phenol solution
by using a little smaller amount of catalysts, about
0.2 g. In the second run, TiO2-mounted activated carbon
catalyst showed the same photoactivity in phenol
removal as in the first run, but P-25 gave slower rate.
Measured IR spectra of these catalysts before and after
phenol decomposition showed that some organic compounds
adsorbed on the surface of P-25 catalyst after
used. In the range of wavelength 1150–1270 cm−1,
the additional bands formed, which were attributed to
O–C–O vibration of carbonate or ether species, was
illustrated in Fig. 4.