Abstract
The iodine doped α-Fe2O3 hollow spheres combined with Co3O4 were firstly prepared by a two-step method. The catalysts with the structure of p-Co3O4/n-I-Fe2O3 HS exhibited excellent photo-degradation activity under visible irradiation. More than 94% RhB was degraded within 10 min, the reaction rate constant was calculated to 0.303 min−1 which was 10.7 times higher than pure Fe2O3 particles. The iodine doping decreased the surface electron impedance and enhanced the separation of photo-induced carriers. The formation of hollow spheres increased the specific surface area of the catalysts as expected. The p-n junction further promoted carriers separation and the Fenton reaction.
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