Sulfate saturated biosorbent-derived Co-S@NC nanoarchitecture as an efficient catalyst for peroxymonosulfate activation

[Display omitted] •Co3O4 in Co@NC were primarily coordinated with the pyridinic N as catalytic sites.•SO42−-derived S was doped onto the Co3O4 in Co-S@NC during the one-pot pyrolysis.•S incorporation can promote the formation of non-radical 1O2 and various radicals.•DFT calculations indicated the en...

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Published in:Applied catalysis. B, Environmental Environmental, 2020-03, Vol.262, p.118302, Article 118302
Main Authors: Du, Weiyan, Zhang, Qingzhu, Shang, Yanan, Wang, Wei, Li, Qian, Yue, Qinyan, Gao, Baoyu, Xu, Xing
Format: Article
Language:English
Subjects:
Acetic acid
Activation
Active sites
Anchors
Carbon
Catalysts
Cobalt
Cobalt oxides
Decomposition
Decomposition reactions
Density functional theory
Dinotefuran
Dopants
Nitrogen
Nitrogen doped carbon martix
Peroxymonosulfate
Pyrolysis
S doped Co3O4
Sorbents
Sulfates
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Summary:[Display omitted] •Co3O4 in Co@NC were primarily coordinated with the pyridinic N as catalytic sites.•SO42−-derived S was doped onto the Co3O4 in Co-S@NC during the one-pot pyrolysis.•S incorporation can promote the formation of non-radical 1O2 and various radicals.•DFT calculations indicated the enhanced electronic conductivity after S incorporation. Using sulfate saturated bio-sorbent and cobalt(II) acetate as precursors, the homogeneous assembly of S-Co3O4 in nitrogen doped carbon martix (Co-S@NC) was obtained for the first time in an one-step pyrolysis. The reactions between peroxymonosulfate (PMS) and Co-S@NC for dinotefuran (DIN) decomposition were investigated. Co3O4 in Co@NC were primarily coordinated with the pyridinic N as catalytic sites. The adsorbed sulfate as S dopant was incorporated into the Co3O4 in carbon matrix due to the role of N as anchors, and the DIN decomposition of S-doped samples increased by 1.71 times as compared to the S-free sample (Co@NC). S incorporation can promote the formation of non-radical 1O2 and various radicals. In addition, DFT calculations indicated the enhanced electronic conductivity after S incorporation, which would facilitate the DIN decomposition in Co-S@NC/PMS system. This work enables the first insight into the role of adsorbed sulfate as effective S dopant for PMS activation.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2019.118302