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Type: Journal article
Title: Nickel in hierarchically structured nitrogen-doped graphene for robust and promoted degradation of antibiotics
Author: Kang, J.
Zhang, H.
Duan, X.
Sun, H.
Tan, X.
wang, S.
Citation: Journal of Cleaner Production, 2019; 218:202-211
Publisher: Elsevier
Issue Date: 2019
ISSN: 0959-6526
Statement of
Jian Kang, Huayang Zhang, Xiaoguang Duan, Hongqi Sun, Xiaoyao Tan, Shaobin Wang
Abstract: Nickel nanoparticles encapsulated in nitrogen-doped porous graphene (Ni@NPG) were synthesized through a one-pot method as a novel material for catalytic activation of persulfate (PS). The Ni@NPG catalysts were evaluated for adsorptive and catalytic removals of antibiotic sulfachloropyridazine (SCP) as an emerging pollutant and were found to exhibit excellent adsorption and catalysis with 100% SCP removal from water in only 30 min. Meanwhile, great stability and reusability can be achieved with satisfactory organic degradation after 4 successive runs. In addition, metal leaching was prohibited from the metal@carbon catalysts due to the protection of carbon walls. The influences of humid acid and inorganic anions (HCO₃¯, Cl¯, Br¯ and H₂PO₄¯) on SCP degradation at various concentrations were further investigated and the present study shows that all these species promoted the SCP degradation at a low concentration whereas an inhibition effect occurred at higher concentrations due to radical quenching. Electron paramagnetic resonance (EPR) and quenching experiments reveal the PS activation mechanism involving generation of SO₄•¯, •OH and •O₂¯ without singlet oxygen. The synergistic effect of radical and nonradical pathways played crucial roles during the SCP oxidation process.
Keywords: N-doped graphene; metal encapsulation; persulfate; antibiotics; AOPs
Rights: © 2019 Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.jclepro.2019.01.323
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Chemical Engineering publications

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