Abstract
Particulate matters with different sizes (PM2.5 and PM10) in the air have become a supreme environmental concern to human health globally. Herein, the magnetic-luminescent Cu//Tb dual metal-organic frameworks (MOFs) incorporated side-by-side nanofibrous (SBS-NFs) membrane has been successfully fabricated via the electrospinning technique with the self-designed nozzle for the first time. The fabricated SBS-NFs membrane was composed of Cu-MOF/PAN at one side and Tb-MOF/PAN at another side with their individual characteristics. The Cu-MOF was used to improve the filtration efficiency and reduced the pressure drop by enhancing the electrostatic interaction, whereas, Tb-MOF was incorporated to investigate the PM adsorption process through the changes in luminescence intensity. Compared to polyacrylonitrile nanofibers (PAN NFs), Cu//Tb dual MOFs incorporated SBS-NFs membrane showed an enhanced filtration efficiency (90.2%) and a reduced pressure drop (60.7 Pa) when sodium chloride (NaCl) aerosols with particle size less than 300 nm were used for testing. As a result of the filter test using car exhaust, Cu//Tb SBS-NFs membrane still maintained >91% PM removal efficiency for >30 h. In addition, it was confirmed that the luminescence intensity over the PM adsorption time was linearly weakened. Therefore, Cu//Tb dual MOFs incorporated SBS-NFs membrane can be used for a variety of applications.
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