Catalytic ozonation of di-n-butyl phthalate degradation using manganese ferrite/reduced graphene oxide nanofiber as catalyst in the water.

Author(s) Ren, Y.; Zhang, H.; An, H.; Zhao, Y.; Feng, J.; Xue, L.; Luan, T.; Fan, Z.
Journal J Colloid Interface Sci
Date Published 2018 Sep 15

Graphene oxide doping MnFeO (rGO-MnFeO) nanofibers were synthesized via electrospinning method and applied to degrade refractory Di-n-butyl Phthalate (DBP) by catalytic ozonation in the water. Characterizations and effect of various conditions on DBP removal were investigated. Meanwhile, the mechanism of enhanced DBP degradation after rGO incorporation was explored intensively. Results showed that 5 wt% GO doping into MnFeO improved the concentration of surface hydroxyl sites (SHSC), the oxidation potential, material diffusion and charge electronic transfer ability in contrast to MnFeO nanofibers, resulting in significantly enhanced DBP degradation compared with ozonation alone. Chemisorbed oxygen groups (MnOH, COH or COOH) on the surface of rGO-MnFeO played a key role in generating radicals, which was the origin of catalytic ozonation reaction. Moreover, a good positive linear relation between SHSC and DBP removal was found. The electrons cycle between Mn and Mn induced the ozone decomposition to produce hydroxyl radicals, which was the major impetus for DBP degradation in 5%rGO-MnFeO/O system. Composite nanofiber of 5%rGO-MnFeO had a good stability and removal rate only decreased for 4% after five times reuse.

DOI 10.1016/j.jcis.2018.04.073
ISSN 1095-7103
Citation J Colloid Interface Sci. 2018;526:347355.

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