Electrocatalytic Generation of Singlet Oxygen via ROS-Mediated Redox Chain Reaction for Efficient Disinfection.
Nano Lett
; 24(23): 6939-6947, 2024 Jun 12.
Article
em En
| MEDLINE
| ID: mdl-38814180
ABSTRACT
The risk of harmful microorganisms to ecosystems and human health has stimulated exploration of singlet oxygen (1O2)-based disinfection. It can be potentially generated via an electrocatalytic process, but is limited by the low production yield and unclear intermediate-mediated mechanism. Herein, we designed a two-site catalyst (Fe/Mo-N/C) for the selective 1O2 generation. The Mo sites enhance the generation of 1O2 precursors (H2O2), accompanied by the generation of intermediate â¢HO2/â¢O2-. The Fe site facilitates activation of H2O2 into â¢OH, which accelerates the â¢HO2/â¢O2- into 1O2. A possible mechanism for promoting 1O2 production through the ROS-mediated chain reaction is reported. The as-developed electrochemical disinfection system can kill 1 × 107 CFU mL-1 of E. coli within 8 min, leading to cell membrane damage and DNA degradation. It can be effectively applied for the disinfection of medical wastewater. This work provides a general strategy for promoting the production of 1O2 through electrocatalysis and for efficient electrochemical disinfection.
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Base de dados:
MEDLINE
Assunto principal:
Oxirredução
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Desinfecção
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Oxigênio Singlete
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Escherichia coli
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Peróxido de Hidrogênio
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article