Your browser doesn't support javascript.
loading
Fundamental Insights into the Direct Electron Transfer Mechanism on Ag Atomic Cluster.
Wu, Yanan; Zhao, Kun; Wu, Shuai; Su, Yan; Yu, Hongtao; Qian, Xubin; Shi, Xinglei; Liu, Aoshen; Huo, Shengli; Li, Wen-Wei; Niu, Junfeng.
Afiliación
  • Wu Y; College of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing 102206, China.
  • Zhao K; College of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing 102206, China.
  • Wu S; College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
  • Su Y; Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
  • Yu H; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China.
  • Qian X; Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
  • Shi X; College of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing 102206, China.
  • Liu A; College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
  • Huo S; College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
  • Li WW; College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
  • Niu J; CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science & Technology of China, Hefei 230026, China.
Environ Sci Technol ; 2024 Sep 17.
Article en En | MEDLINE | ID: mdl-39288224
ABSTRACT
The nonradical oxidation pathway for pollutant degradation in Fenton-like catalysis is favorable for water treatment due to the high reaction rate and superior environmental robustness. However, precise regulation of such reactions is still restricted by our poor knowledge of underlying mechanisms, especially the correlation between metal site conformation of metal atom clusters and pollutant degradation behaviors. Herein, we investigated the electron transfer and pollutant oxidation mechanisms of atomic-level exposed Ag atom clusters (AgAC) loaded on specifically crafted nitrogen-doped porous carbon (NPC). The AgAC triggered a direct electron transfer (DET) between the terminal oxygen (Oα) of surface-activated peroxodisulfate and the electron-donating substituents-containing contaminants (EDTO-DET), rendering it 11-38 times higher degradation rate than the reported carbon-supported metal catalysts system with various single-atom active centers. Heterocyclic substituents and electron-donating groups were more conducive to degradation via the EDTO-DET system, while contaminants with high electron-absorbing capacity preferred the radical pathway. Notably, the system achieved 79.5% chemical oxygen demand (COD) removal for the treatment of actual pharmaceutical wastewater containing 1053 mg/L COD within 30 min. Our study provides valuable new insights into the Fenton-like reactions of metal atom cluster catalysts and lays an important basis for revolutionizing advanced oxidation water purification technologies.
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Environ Sci Technol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Environ Sci Technol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos