[Retracted] Highly Active Rare-Earth-Metal La-Doped Photocatalysts: Fabrication, Characterization, and Their Photocatalytic Activity

Table 5

Comparison of relative photonic efficiencies in the photocatalytic degradation of MCP by pure and La-doped semiconductors (TiO₂ and ZnO).

Photocatalyst	Relative photonic efficiency (𝜉𝑟)
TiO2	1.0 ± 0.01	In this study
1.0 wt% La-TiO2 (254 nm)	2.33 ± 0.01	In this study
1.0 wt% La-TiO2 (365 nm)	1.82 ± 0.01	In this study
Pure ZnO	1.03 ± 0.01	[18]
1.0% La-ZnO (254 nm)	1.51 ± 0.01	[18]
Baker and Adamson	0.38 ± 0.02	[18]
Tioxide	1.9 ± 0.1	[21]
Sargent-Welch	2.1 ± 0.1	[21]
Fluka AG	2.2 ± 0.2	[21]
Hombikat UV-100	0.25 ± 0.02	[21]

MCP = 40 mg L⁻¹, TiO₂ or La-TiO₂ = 100 mg/100 mL, pH = 5, UV = 8 lamps, λ = 254/365 nm, adsorption equilibrium time = 30 min, and irradiation time = 60 min.