Catalase/Fe3O4@Cu2+ hybrid biocatalytic nanoflowers fabrication and efficiency in the reduction of organic pollutants

In this work, the magnetic spinel-Fe nanomaterials (Fe3O4 NMs) were prepared, and then the catalase was immobilized to the Fe3O4. After, the enzyme@inorganic hybrid nanoflowers (catalase/Fe3O4@Cu2+ hNFs) were synthesized using the catalase as the organic component and Cu2+ ions and Fe3O4 as the inorganic components, defined as a catalyst. The catalase/Fe3O4@Cu2+ hNFs were characterized by using various techniques such as FT-IR, SEM, EDX, as well as XRD. The fabricated catalase/Fe3O4@Cu2+ hNFs at different pH (6.0, 7.4, 8.0, and 9.0) were tested in the reduction of nitrobenzenes and organic dye. The best results for catalase/Fe3O4@Cu2+ hNFs at different pHs were found to be 77.61%, 68.60%, 82.95%, and 91.52% with 4-nitroaniline, respectively. Herein, the effect of both pH and substrate change on the conversion of the catalytic reaction was examined. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

In this study, catalase/Fe3O4@Cu2+ hNFs were prepared as catalysts and characterized using various techniques. The reduction of nitrobenzenes and organic dye at different pH levels showed promising results, with the best conversion rates observed at pH 9.0 for both substrates. The study also examined the impact of pH and substrate change on the catalytic reaction conversion.