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

Table 1

Mean crystalline size and phase of the prepared TiO₂ samples.

Samples	Undoped TiO2	TiO2-1%Co	TiO2-2.5%Co	TiO2-5%Co	TiO2-1%Co-2.5%Fe	TiO2-2.5%Co-2.5%Fe
Crystalline phase	Anatase	Anatase	Anatase	Anatase	Anatase	Anatase
Mean crystalline size	7.8 nm	6.8 nm	7.4 nm	7.5 nm	6.2 nm	7.6 nm