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

Table 1

Characteristics for TiO₂ and SO₄^2-/TiO₂.

Sample	Average crystallite size (nm)	Ratio of the anatase to rutile phase	Specific surface area (m^2g^-1)	RhB photodegradation efficiency (%)
				After 9 hours of the visible light irradiation	After 2 hours of the sunlight irradiation
TiO2	19.09	83.16/16.84	89.4135	11.77	26.09
SO4^2-/TiO2	22.19	82.95/17.05	49.9120	99.47	99.63