One-Step Synthesis of Spherical γ-Fe₂O₃ Nanopowders and the Evaluation of Their Photocatalytic Activity for Orange I Degradation

Figure 6

Photocatalytic degradation of Orange I by different γ-Fe₂O₃ powders that were prepared under various reaction times at 60°C and pH 6.0 (a) irradiated by visible light and (b) the TOC removal rates under irradiation of UV light.

(a)

(b)