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

By Weiyan Du, Qingzhu Zhang, Ya-nan Shang, W. Wang, Qian Li, Q. Yue, B. Gao, Xing Xu. 2020

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Abstract 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.

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/13cc5b10aabf3a2c6ef8c4e8b2a7e2d87fec46cb