Green synthesis of magnetically recyclable MnZnFeO@ZnMnS composites from spent batteries for visible light photocatalytic degradation of phenol.

Magnetic binary heterojunctions are a kind of promising photocatalysts due to their high catalytic activity and easy magnetic separation; however, their synthesis may involve high costs or secondary environmental impacts. In this work, the magnetically recyclable MnZnFeO@ZnMnS (MZFO@ZnMnS, x = 0.00-0.