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   sono-heterogeneous fenton system for degradation of ab74 dye over a new tetraaza macrocyclic schiff base cellulose ligand-loaded fe3o4 nanoparticles  
   
نویسنده mehdaoui rahma ,chaabane laroussi ,beyou emmanuel ,baouab mohamed hassen v.
منبع journal of the iranian chemical society - 2019 - دوره : 16 - شماره : 3 - صفحه:645 -659
چکیده    The study detailed herein is related to the synthesis of novel tetraaza macrocyclic schiff base cellulose ligand: (eda-g-dac) via condensation reaction of periodate oxidized developed microcrystalline cellulose (dac) with ethylenediamine (eda) was reported. additionally, tetraaza macrocyclic schiff base cellulose ligand-loaded fe3o4 nanoparticles: [(eda-g-dac)@fe3o4] was successfully prepared using in situ chemical co-precipitation of coordinated ferric and ferrous ions in the tetraaza macrocyclic schiff base cellulose ligand: (eda-g-dac) under mild conditions. the synthesized compounds were investigated by x-ray diffraction (xrd), fourier transform infrared (ft-ir) spectroscopy, scanning electron microscope (sem), thermogravimetric analysis (tga) and vibrating sample magnetometer (vsm). [(eda-g-dac)@fe3o4] was of a narrow size distribution, and exhibited ferromagnetic behaviors with saturation magnetization 24.63 emu g−1. the degradation of indigo carmine (ab74) over [(eda-g-dac)@fe3o4] was studied using a coupled ultrasound/heterogeneous or sono-heterogeneous fenton process. more importantly, us + [(eda-g-dac)@fe3o4] + h2o2 were demonstrated for the first time as a high efficient for the degradation of ab74. the pseudo first-order-reaction constant of us + [(eda-g-dac)@fe3o4] + h2o2 were measured to be 0.0979 min−1. total organic carbon (toc) and chemical oxygen demand (cod) removal rates are 0% and 98.7%, respectively. additionally, the [(eda-g-dac)@fe3o4] showed the higher enhanced sonocatalytic degradation of ab74 than other dyes mb and ay17. furthermore, the catalysts can be easily recycled within 10 s using an external magnetic field and a constant catalytic activity is retained even after five cycles.
کلیدواژه tetraaza macrocyclic ,magnetite ,sono-heterogeneous fenton ,indigo carmine (ab74)
آدرس université de monastir, laboratoire de microélectroniques et instrumentations, faculté des sciences de monastir, tunisia, université de monastir, laboratoire de microélectroniques et instrumentations, faculté des sciences de monastir, tunisia. université lyon 1, france, université lyon 1, france, université lyon 1, france
 
     
   
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