The mechanism of degradation of bisphenol A using the magnetically separable CuFe2O4/peroxymonosulfate heterogeneous oxidation process

Activation of peroxymonosulfate with magnetic and recyclable Fe3 O4 @C/MnCo2 O4 nanocomposites for the decolorization of Acid Orange II

“…Sui et al . found that the surface hydroxyl groups are the active sites for catalytic decomposition and reactive radical generation . A reduced number of surface hydroxyl groups is consistent with the decreased performance of the catalyst after several recycled uses in the oxidation degradation process.…”

“…The O 1 s XPS spectrum in Fig. (d) can be fitted into three peaks at 530.0, 531.6, and 533.0 eV, which belong to the lattice oxygen of the metal–oxygen bonds in the metal oxide, the oxygen of hydroxide ions, and the oxygen of physically adsorbed water molecules, respectively . Therefore, the results of the XPS measurements confirmed the coexistence of solid‐state redox pairs of Mn III /Mn II and Co III /Co II in the spinel MnCo 2 O 4 structures of Fe 3 O 4 @C/MnCo 2 O 4 composites, which may provide interesting redox activities for heterogeneous catalysis …”

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

“…MNPs prepared by steel pickling waste liquor to reduce the cost of preparation are comparable to those obtained by the common co-precipitation method for the heterogeneous Fenton-like catalytic degradation of bisphenol A (BPA) [202]. Oxidative removal of BPA involving PMS activated by CuFe2O4 magnetic NPs is through surface-bound, rather than free radicals generated by a surface catalyzed-redox cycle involving both Fe(III) and Cu(II) [203].…”

Heterogeneous degradation of refractory pollutants by peroxymonosulfate activated by CoOx-doped ordered mesoporous carbon

“…In addition, complex compounds of phosphate-Co could be produced in the presence of phosphate ions [44]. It was reported that the active sites such as surface hydroxyl groups will be occupied by phosphate and undermine the inner-sphere complexation due to their very strong affinity to active sites [15,49]. Thus, it may be assumed that the inhibition of phenol degradation due to the deactivation of Co-OMC surface by phosphate.…”