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

Figure 15

XRD patterns for the TiO₂, the initial SO₄^2-/TiO₂ and the reused SO₄^2-/TiO₂ after the third cycle.