Hetero-interface-engineered sulfur vacancy and oxygen doping in hollow Co9S8/Fe7S8 nanospheres towards monopersulfate activation for boosting intrinsic electron transfer in paracetamol degradation
- Authors
- Khiem, Ta Cong; Huy, Nguyen Nhat; Kwon, Eilhann; Duan, Xiaoguang; Wacławek, Stanisław; Bedia, Jorge; Tsai, Yu-Chih; Ebrahimi, Afshin; Ghanbari, Farshid; Lin, Kun-Yi Andrew
- Issue Date
- Aug-2023
- Publisher
- Elsevier B.V.
- Keywords
- Paracetamol; Co9S8/Fe7S8 heterostructure; Sulfur vacancy; Oxygen-doping; Electron transfer
- Citation
- Applied Catalysis B: Environmental, v.330, pp.1 - 23
- Indexed
- SCIE
SCOPUS
- Journal Title
- Applied Catalysis B: Environmental
- Volume
- 330
- Start Page
- 1
- End Page
- 23
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192856
- DOI
- 10.1016/j.apcatb.2023.122550
- ISSN
- 0926-3373
- Abstract
- Designing defects-rich hollow heterostructure bimetal sulfides is considered as an efficient strategy for accelerated monopersulfate (MPS) activation. Herein, mono-step sulfidation was employed to develop sulfur vacancy (SV)-rich hollow oxygen-doped Co9S8/Fe7S8 (O-CSFS). SV and oxygen doping-induced highly electroactive sites, low charge resistance, and increased conductivity of O-CSFS accounted for its superior performance. Reactive oxygen species (ROS)-driven pathway and electron transfer (ET)-driven pathway were revealed to be responsible for PCM degradation in O-CSFS/MPS system, but the role of ET-driven pathway was more significant. The ROS-driven pathway was mainly attributed to electrons-rich low valance of Co atoms which activated MPS to generate different ROS without •OH contribution and with a greater role of SO4•− than 1O2. Doped O, S species, and surface-active O-CSFS/MPS complex in ET-driven pathway, meanwhile, acquired electrons from PCM, resulting in enhanced PCM oxidation. This study provided more insight into ET-enhanced efficient PCM degradation induced by SV and oxygen-doping.
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