P-25 TiO2 was obtained from the Degussa Corp. and used
as received. It has been reported to be a nonporous 70:30
anatase:rutile mixture, with a BET surface area of ca. 55 ±
15m2 g−1 and crystallite size of 30 nm in 0.1 m diameter
aggregates [19]. KOH and H2SO4 were used to adjust pH
of the reaction solution.