The use of ferrites as visible light photocatalysts for the degradation of contaminants in water has gained much interest in recent years. The studied contaminants include both organic and inorganic compounds, specific dyes, and bacteria. The high adsorptive capacity and VLA photocatalytic property makes spinel ferrites highly suitable in the field of water treatment. Ferrites have been applied for the removal of organic and inorganic contaminants from the environment. A p-type CaFe2O4, has been shown to be effective in the photocatalytic reduction of CO2 to form methanol as the major product [50]. The photo-dehydrogenation of H2S is possible using ZnFe2O4 as a photocatalyst and this process produces H2, provides the potential benefits of
