Visible-Light-Driven SO₄^2-/TiO₂ Photocatalyst Synthesized from Binh Dinh (Vietnam) Ilmenite Ore for Rhodamine B Degradation

Figure 5

The N₂ adsorption-desorption isotherms at 77 K for (a) TiO₂ and (b) SO₄^2-/TiO₂.

(a)

(b)