Magnetic nanoparticles loaded PCN-250 for CO2 capture

“Since the significant energy cost for the regeneration of MOF adsorbents is one of the biggest problems for widespread application, Hill et al. [65] fabricated a light and magnetic responsive MOF for further energy saving. A magnetic induction swing adsorption strategy was utilized by integrating the magnetic nanoparticles, Fe3O4, with PCN-250 frameworks to form the mPCN composites. Such magnetic Fe3O4 nanoparticles can be served as nanoheaters to locally produce the heat upon exposing mPCN composites to an alternating magnetic field. Consequently, the localized heating efficiently released the adsorbed CO2 from mPCN adsorbents. Therefore, by collaboratively combining the magnetic induced localized heating and light induced localized isomerization, a dramatically improved CO2 liberation from MOF can be realized. For example, upon only UV light exposure, mPCN-H could only release 30.7% CO2 from pristine capacity, 70 cm3/g. However, by the introduction of magnetic fields and UV light irradiation, a total 96.8% of CO2 release was achieved. This method provides a potentially low energy cost and highly efficient approach to regenerate MOF adsorbents.”

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