Scholarlink

<p>Rapid industrialization has exacerbated phenol-containing wastewater pollution, heightening the need for effective treatment of phenolic contaminants like phenol. While advanced oxidation processes (AOPs) such as the Fenton reaction are widely recognized for phenol degradation, conventional AOPs face limitations due to high H<sub>2</sub>O<sub>2</sub> costs and iron sludge generation. Consequently, persulfate (PS)-based AOPs, known for their strong oxidizing capacity and environmental compatibility, have emerged as a research focus for phenolic wastewater treatment. Developing highly active, low-cost catalysts is crucial for efficient PS-AOPs. Single-atom catalysts (SACs), which maximize metal atom utilization and offer environmental friendliness, are particularly promising. This study introduces a system employing a porous carbon-supported single-atom iron catalyst (Fe–N–C) to activate peroxydisulfate (PDS) for phenol degradation. The Fe–N–C catalyst features a highly microporous, graphitic structure with uniformly dispersed, low-concentration surface iron atoms. The Fe–N–C/PDS system achieved over 97% phenol removal and over 95% COD reduction under optimal conditions, primarily through synergistic effects of hydroxyl radicals (HO<sup>•</sup>) and singlet oxygen (<sup>1</sup>O<sub>2</sub>), which collectively accounted for more than 97% of the reaction contribution. The system exhibits excellent pH adaptability (pH = 2.75–11.00) and resistance to ionic interference, maintaining over 84% phenol removal in the presence of various anions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Graphite Carbon Supported Single-Atom Iron Catalyst Activates Persulfate for Phenol Degradation: Radical and Non-Radical Synergistic Mechanism

  • 期刊论文

  • 发表日期：

    2025年12月12日

查看全文
  • Shifeng Li,
  • Mengran Chu,
  • Yu Tian,
  • Juan Yang,
  • Shuhua Yao,
  • Min Xiao

摘要

Rapid industrialization has exacerbated phenol-containing wastewater pollution, heightening the need for effective treatment of phenolic contaminants like phenol. While advanced oxidation processes (AOPs) such as the Fenton reaction are widely recognized for phenol degradation, conventional AOPs face limitations due to high H2O2 costs and iron sludge generation. Consequently, persulfate (PS)-based AOPs, known for their strong oxidizing capacity and environmental compatibility, have emerged as a research focus for phenolic wastewater treatment. Developing highly active, low-cost catalysts is crucial for efficient PS-AOPs. Single-atom catalysts (SACs), which maximize metal atom utilization and offer environmental friendliness, are particularly promising. This study introduces a system employing a porous carbon-supported single-atom iron catalyst (Fe–N–C) to activate peroxydisulfate (PDS) for phenol degradation. The Fe–N–C catalyst features a highly microporous, graphitic structure with uniformly dispersed, low-concentration surface iron atoms. The Fe–N–C/PDS system achieved over 97% phenol removal and over 95% COD reduction under optimal conditions, primarily through synergistic effects of hydroxyl radicals (HO•) and singlet oxygen (1O2), which collectively accounted for more than 97% of the reaction contribution. The system exhibits excellent pH adaptability (pH = 2.75–11.00) and resistance to ionic interference, maintaining over 84% phenol removal in the presence of various anions.