Abstract
Novel well-defined superparamagnetic Fe3O4@Bacilus subtilis composite (Fe3O4@B. subtilis SPMC) was synthesized through a facile electrostatic attraction method and used as a recyclable heterogeneous Fenton-like catalyst. With the presence of H2O2, Fe3O4@B. subtilis SPMC can remove nearly 87% of the doxycycline at the initial concentration of 50 mg L−1, exhibiting enhanced Fenton-like catalytic performance than pristine Fe3O4. The mechanism study demonstrates the synergistic effect between Bacilus subtilis adsorption and Fenton-like ability of Fe3O4 dominates the enhancement for Fenton-like catalytic efficiency of Fe3O4@B. subtilis SPMC. The obtained composite shows excellent recycling ability, reusability, and stability, which pave a new way for future design on highly efficient Fenton-like catalyst for degradation of organic pollutants.
Highlights
Magnetite (Fe3 O4 ) has attracted growing research interests in various fields, such as Li ion batteries [1], catalysts [2], drug delivery and targeting [3], etc., due to its distinguished physical and chemical properties [4,5]
We present a facile electrostatic attraction method for the coating of Fe3 O4 nanoparticles onto the surfaces of B. subtilis to form superparomagnetic recyclable Fe3 O4 @B. subtilis
The catalytic performance of Fe3 O4 @B. subtilis Superparamagnetic Composite (SPMC) was tested by the degradation of DC in semi-batch operation mode at neutral pH 0.05 g catalysts were dispersed into 100 mL aqueous solution of DC (25 mg L−1 ) at room temperature
Summary
Magnetite (Fe3 O4 ) has attracted growing research interests in various fields, such as Li ion batteries [1], catalysts [2], drug delivery and targeting [3], etc., due to its distinguished physical and chemical properties [4,5] These magnetite Fe3 O4 nanoparticles (MNPs) may aggregate into large clusters because of the anisotropic dipolar interactions, reducing their dispersibility and other specific properties and diminishing their activity [6]. The morphology, crystal structure, functional groups, magnetic property, and Fenton-like catalytic performance of Fe3 O4 @B. subtilis superparomagnetic composite. The mechanism for the enhanced Fenton‐like catalytic activity of Fe. 3O4@B. subtilis SCP is proposed and investigated through photoluminescence (PL) study
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