Journal
ENVIRONMENTAL SCIENCE-NANO
Volume 7, Issue 5, Pages 1444-1453Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0en00050g
Keywords
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Funding
- Major Technological Innovation Engineering Project of Shandong Province [2018CXGC1010]
- Tai Shan Scholar Foundation [ts201511003]
- Key Research Projects of Shandong Province [2017GSF17109, 2018WLJH52]
- Shanghai Tongji Gao Tingyao Environmental Science & Technology Development Foundation (STGEF)
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In this work, the carbon nanotubes (CNTs) encapsulating Zn and Fe bimetallic nanoparticles (FeZn@NC) were synthesized through a one-pot pyrolytic strategy. The persulfate (PS) activation ability of FeZn@NC with various ratios of Fe and Zn was determined by sulfamethoxazole (SMX) degradation. The results indicated that the iron played a key role in forming external CNTs and the catalytic activity of FeZn@NC was mainly based on the encapsulated FeZn nanoparticles. In addition, PS activation was greatly strengthened by the heterostructure of FeZn@NC. Free radical quenching experiments and electron paramagnetic resonance (EPR) spectra suggested that the singlet oxygen was the key reactive oxygen species for SMX degradation. The activity of pyridinic-N, pyrrolic-N and graphitic-N on external CNTs was analyzed by theoretical calculations, which showed the pyridinic-N possessed strong adsorptive ability to activate PS to degenerate sulfate radicals.
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