Cu(I)-doped Fe 3 O 4 nanoparticles/porous C composite for enhanced H 2 O 2 oxidation of carbamazepine

Cu(I) doped nano-Fe O were synthesized and loaded on ordered porous carbon materials using a facile co-precipitated. The synthesized catalysts were characterized by XRD, XPS, HRTEM, FESEM-EDX mapping and N adsorption-desorption. The results showed that the crystal unit cell of Fe O was enlarged due to the implantation of small amount of Cu(I) into the Fe O structure (Fe Cu O ). With increased Cu content, the catalyst was dominated with Cu O and the Fe O phase disappeared, the catalytic performance of Fe-Cu bimetal oxide became worse. The Cu(I)-Fe O /C composite was enriched with Fe(II), Fe(III) and Cu(I) sites. The prepared Cu-Fe bimetal oxide/C composite exhibited higher specific TOF and oxidation efficiency E on carbamazepine oxidation than Fe Cu O and Fe O . The enhanced catalytic reactivity was attributed to the synergetic effect of surface Fe and Cu species on the H O activation. The dissolved metals induced catalytic reaction at pH 4.5-8.1 was ignorable. Thus, the catalytic decomposition of H O by Cu-Fe O /C at near neutral pH was controlled by interface reactions. The CBZ in the close proximity to the interface was attacked by the generated ROS and formed urea, 2-hydroxybenzyl alcohol and other oxidative products.