Jump to main content
Jump to site search


Fe/Mn nanoparticles encapsulated nitrogen-doped carbon nanotubes as peroxymonosulfate activator for acetamiprid degradation

Abstract

N-doped carbon nanotubes encapsulating bimetallic Fe/Mn nanoparticles (FeMn@NCNT) was fabricated after one-step of pyrolysis and it was used as the catalyst for peroxymonosulfate activation to degrade the acetamiprid. The FeMn@NCNT showed uniform nanotubes with rich N doping and the encapsulated FeMn nanoparticles were doubly protected by both NCNTs and clingy graphitic structure. Results indicated that the confined FeMn nanoparticles was designated as Fe2.7Mn0.3C according to the XRD pattern and element composition. Radical quenching indicated that SO4∙- and ∙OH were the dominant radicals in the FeMn@NCNTs/PMS system. Indispensable roles of both radical pathways of O2·- and non-radical 1O2 to the superior catalytic performance was also confirmed. As a result, both the embedded FeMn nanoparticles and NCNTs in FeMn@NCNT contributed to the acetamiprid degradation with multiple degradation mechanisms. XPS results confirmed the form of redox cycles between the multiple valence states of Mn and Fe, which ensured the superior catalytic activity of FeMn@NCNTs for PMS activation. In addition, only a small decrease in the catalytic performance from 99.5% to 90% was observed after four cycles. The catalytic activity of used FeMn@NCNT was mostly recovered after heat regeneration (350 oC), which exhibited the excellent stability and reusability of FeMn@NCNT.

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Feb 2019, accepted on 11 Apr 2019 and first published on 11 Apr 2019


Article type: Paper
DOI: 10.1039/C9EN00220K
Citation: Environ. Sci.: Nano, 2019, Accepted Manuscript

  •   Request permissions

    Fe/Mn nanoparticles encapsulated nitrogen-doped carbon nanotubes as peroxymonosulfate activator for acetamiprid degradation

    P. Duan, T. Ma, Y. Yue, Y. Li, X. Zhang, Y. Shang, B. Gao, Q. Zhang, Q. Yue and X. Xu, Environ. Sci.: Nano, 2019, Accepted Manuscript , DOI: 10.1039/C9EN00220K

Search articles by author

Spotlight

Advertisements