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- W3119559143 abstract "Abstract BACKGROUND Immobilization of enzymes on a nanocarrier can improve their stability, but is often accompanied by a reduction of the initial catalytic activity. Meanwhile, inevitable mass loss during centrifugal separation inhibits reusability. It is still a challenge to design and prepare an immobilized enzyme with both improved catalytic activity and reusability simultaneously. RESULTS Core–shell magnetic microspheres (Fe 3 O 4 @mTiO 2 ) with mesoporous structure were prepared and used to construct an enzymatic nanocomposite (CPO‐Fe 3 O 4 @mTiO 2 ). This material can combine magnetic separability, photocatalytic property of TiO 2 and enzymatic activity of chloroperoxidase (CPO) when applied in the degradation of aqueous organic contaminants diphenylamine and pesticide residue isoproturon. Moreover, CPO‐Fe 3 O 4 @mTiO 2 showed good stability and reusability. It can keep 78.0% and 66.8% of its initial activity after incubation at 80 and 90 °C for 1 h, respectively, while free CPO only retained 18.3% and 6.9% of its original activity for the same conditions. After being used for eight cycles, CPO‐Fe 3 O 4 @mTiO 2 can retain over 82.2% of activity. When applied in the degradation of isoproturon/diphenylamine in artificial wastewater, 60 μmol L −1 isoproturon can be completely degraded in 30 min; 82.2% of diphenylamine can be degraded at a concentration of 10 μmol L −1 . Compared with the removal of aqueous contaminants using a porous adsorbent, CPO‐Fe 3 O 4 @mTiO 2 can be regenerated ‘online’, obviating complicated procedures for regeneration. CONCLUSIONS The results indicate that CPO‐Fe 3 O 4 @mTiO 2 has potential for practical application in the treatment of wastewater. © 2021 Society of Chemical Industry" @default.
- W3119559143 created "2021-01-18" @default.
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- W3119559143 date "2021-02-02" @default.
- W3119559143 modified "2023-09-24" @default.
- W3119559143 title "<scp>CPO‐Fe<sub>3</sub>O<sub>4</sub></scp>@<scp>mTiO<sub>2</sub></scp> nanocomposite with integrated magnetic separation and enzymatic and photocatalytic activities in efficient degradation of organic contaminants in wastewater" @default.
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- W3119559143 doi "https://doi.org/10.1002/jctb.6664" @default.
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