A novel 3D Fe 2 O 3 @ZnBi 2 O 4 n–p heterojunction with high photocatalytic activity under visible light

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), which is known as the photo-Fenton reaction. The efficacy showed remarkable photocatalytic activity, which increased the reaction rate by 5.95 times when persulfate was used. Finally, after examination of the energy band structure of the materials and the findings regarding the function of the oxidizing sites in the photocatalytic process, a reaction mechanism was proposed.