Decolorization of Acid Orange II dye by peroxymonosulfate activated with magnetic Fe₃O₄@C/Co nanocomposites

Abstract

Magnetic Fe3O4@C/Co nanocomposites exhibited high efficiency and reusability in activation of PMS for decolorization of AO II solution.

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

“…The wide survey spectrum (Fig. (a)) shows that the sample consists of carbon, oxygen, iron, manganese and cobalt, consistent with the EDS characterization. The weak peak at 399.8 eV is assigned to the N 1 s derived from the trace residue of PVP used in the preparation process .…”

“…Magnetic nanoparticles Fe 3 O 4 and magnetic carbon shell nanoparticles Fe 3 O 4 @C were synthesized according to previously reported methods . A mixture containing 0.1 g of Fe 3 O 4 @C in 20 mL of ethanol was dispersed by ultrasonic irradiation for 10 min.…”

“…Samples of carbon nanospheres (C) were also prepared via modification of the reported methods . Composites of C/MnCo 2 O 4 were then prepared by the same procedure as for Fe 3 O 4 @C/MnCo 2 O 4 except 0.1 g of C was used instead of 0.1 g of Fe 3 O 4 @C. The final black powder obtained was labelled as C/MnCo 2 O 4 .…”

“…For example, Wang et al successfully synthesized a core/shell catalyst of magnetic carbon nanospheres supported cobalt oxide or manganese oxide, respectively, which were found to be excellent in heterogeneous activation of PMS for phenol degradation . We also used Fe 3 O 4 @C to prepare metallic cobalt loaded nanocomposites Fe 3 O 4 @C/Co, which could effectively activate PMS to decolorize AO II solution in 20 min over near neutral pH range (pH 6.4–8.5) …”

CoMoO4 as a novel heterogeneous catalyst of peroxymonosulfate activation for the degradation of organic dyes

“…16 As a result, it is of great importance to develop high-performance heterogeneous catalysts to alleviate the potential secondary contamination from the homogeneous systems.…”