Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO₂ Photocatalytic Processes

Table 2

Surface area of P-25 TiO₂, 5% Ag/TiO₂ and 5% Cu/TiO₂.

Material	Metals added (wt%)	Surface area (m^2 g^−1)
TiO2 (P-25)	—	53.61
	0.5	57.82
Ag/TiO2	2.0	57.68
	5.0	59.38
	0.5	57.03
Cu/TiO2	2.0	58.42
	5.0	58.79