Enhanced Heterogeneous Fenton-Like Degradation by Fe/Cu-TA Encapsulated Melamine Sponge

The heterogeneous Fenton-like degradation overcome the shortage of traditional Fenton system, which got the high catalytic efficiency, good stability, wide pH working range, and so on. However, it is still challenging to develop highly efficient and recyclable solid catalysts in wastewater treatment. Herein, we employed melamine sponge (MS) as a base material to fabricate heterogeneous Fe/Cu-tannic acid (TA) coated MS (MS-Fe/Cu-TA) through the dip-coating method. The porous 3D structure of MS can enhance the catalyst loading, and expose more active catalytic sites to absorb dyes from solution. The loaded Fe/Cu weight ratio, pH value, H2O2 dosage, and initial MB concentration on the catalytic activity were optimized to get highest methylene blue (MB) degradation efficiency. The MS survived five times of cyclic MB degradation, and degradation efficiency for other dyes (methyl orange, rhodamine B, malachite green) kept above 65%. This work brings potential insights for development of enhanced heterogeneous Fenton-like degradation for wastewater treatment.Graphical AbstractHerein, we employed melamine sponge (MS) as a base material to fabricate heterogeneous Fe/Cu-tannic acid (TA) coated MS (MS-Fe/Cu-TA) through the dip-coating method. The porous 3D structure of MS can enhance the catalyst loading, and expose more active catalytic sites to absorb dyes from solution. This work brings potential insights for development of enhanced heterogeneous Fenton-like degradation for wastewater treatment.