Magnetoelectrically Driven Catalytic Degradation of Organics.

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ID: 19321
2019
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Abstract
Here, the catalytic degradation of organic compounds is reported by exploiting the magnetoelectric nature of cobalt ferrite-bismuth ferrite (CFO-BFO) core-shell nanoparticles. The combination of magnetostrictive CFO with multiferroic BFO gives rise to a magnetoelectric engine that purifies water under wireless magnetic fields via advanced oxidation processes, without involvement of any sacrificial molecules or cocatalysts. Magnetostrictive CoFe O nanoparticles are fabricated using hydrothermal synthesis, followed by sol-gel synthesis to create the multiferroic BiFeO shell. Theoretical modeling is performed to study the magnetic-field-induced polarization on the surface of magnetoelectric nanoparticles. The results obtained from these simulations are consistent with experimental findings of the piezoforce microscopy analysis, where changes in piezoresponse of the nanoparticles under magnetic fields are observed. Next, the magnetoelectric-effect-induced catalytic degradation of organic pollutants is investigated under AC magnetic fields, and 97% removal efficiency for synthetic dyes and over 85% removal efficiency for routinely used pharmaceuticals are obtained. Additionally, trapping experiments are performed to elucidate the mechanism behind the magnetic-field-induced catalytic degradation of organic pollutants by using scavengers for each of the reactive species. The results indicate that hydroxyl and superoxide radicals are the main reactive species in the magnetoelectrically induced catalytic degradation of organic compounds.
Reference Key
mushtaq2019magnetoelectricallyadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mushtaq, Fajer;Chen, Xiangzhong;Torlakcik, Harun;Steuer, Christian;Hoop, Marcus;Siringil, Erdem Can;Marti, Xavi;Limburg, Gregory;Stipp, Patrick;Nelson, Bradley J;Pané, Salvador;
Journal advanced materials (deerfield beach, fla)
Year 2019
DOI
10.1002/adma.201901378
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