Characterization of Co²⁺- and Fe³⁺-Codoped TiO₂ Nanomaterials for Photocatalytic Degradation of Organic Pollutants under Visible Light Irradiation

Table 2

Surface characteristics of the representative TiO₂ samples.

Samples	^a (m^2/g)	^b (cm^3/g)	^c (nm)
TiO2-1%Co	170	0.18	3.97
TiO2-5%Co	164	0.23	5.1
TiO2-1%Co-2.5%Fe	174	0.16	4.1
Undoped TiO2	160	0.29	6.7

^aBET surface area. ^bTotal pore volume determined using desorption curves of the isotherms. ^cPeak pore sizes from the pore size distributions.