Catalase/Fe3O4@Cu2+ hybrid biocatalytic nanoflowers fabrication and efficiency in the reduction of organic pollutants. (15th January 2021) - Alhayali, Noor Ibrahim
Graphical abstract: In this study, the catalase/Fe3 O4 @Cu 2+ hNFs were synthesized consisting of catalase as an organic component and copper ions as an inorganic component. Then, the reduction reactions of the nitro anilines (4-nitroaniline (4-NA), 2-nitroaniline (2-NA), and nitrobenzene (NB)) and azo dyes (methyl red (MR)) compounds are fully reduced by catalase/Fe3 O4 @Cu 2+ hNFs. Our results show the reaction parameters affect catalase/Fe3 O4 @Cu 2+ hNFs morphology and catalytic activity. Highlights: The Fe3 O4 NMs was prepared, and the catalase was immobilized to the Fe3 O4 . The catalase/Fe3 O4 @Cu 2+ hNFs were synthesized using the catalase, Cu 2+ and Fe3 O4 . The catalase/Fe3 O4 @Cu 2+ hNFs at different pH were tested in the reduction reaction. Abstract: In this work, the magnetic spinel-Fe nanomaterials (Fe3 O4 NMs) were prepared, and then the catalase was immobilized to the Fe3 O4 . After, the enzyme@inorganic hybrid nanoflowers (catalase/Fe3 O4 @Cu 2+ hNFs) were synthesized using the catalase as the organic component and Cu 2+ ions and Fe3 O4 as the inorganic components, defined as a catalyst. The catalase/Fe3 O4 @Cu 2+ hNFs were characterized by using various techniques such as FT-IR, SEM, EDX, as well as XRD. The fabricated catalase/Fe3 O4 @Cu 2+ 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/Fe3 O4 @Cu 2+ 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.