Scholarlink

<p>This study presents a high-performance cobalt catalyst supported on microwave-pyrolyzed biochar (Co/MPC) for efficient peroxymonosulfate (PMS) activation to degrade atrazine (ATZ). The microwave-assisted pyrolysis (MWP) technique yielded biochar (MPC) with superior textural properties—specifically, a significantly higher specific surface area (214.18 m<sup>2</sup>/g) and pore volume (0.46 cm<sup>3</sup>/g)—compared to conventionally pyrolyzed biochar (BC). This enhanced porous structure facilitated the uniform dispersion of ~5&#xa0;nm cobalt nanoparticles, resulting in the highly active Co/MPC catalyst. The Co/MPC+PMS system achieved over 99% ATZ degradation within just 4&#xa0;min, outperforming its conventionally prepared counterpart (Co/BC) (77%). The catalyst demonstrated robust performance across a range of PMS dosages and pollutant concentrations, with minimal interference from coexisting inorganic ions (Cl<sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, NO<sub>3</sub><sup>−</sup>, H<sub>2</sub>PO<sub>4</sub><sup>−</sup>, HCO<sub>3</sub><sup>−</sup>) and organic humic acid in the Co/MPC+PMS system. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis identified hydroxyl radicals (⋅OH) and sulfate radicals (SO₄⋅⁻) as the dominant reactive species responsible for the rapid degradation. This work highlights the significant advantage of microwave-assisted synthesis in creating advanced carbon-metal catalysts and offers a highly efficient, stable, and practical solution for the remediation of persistent organic pollutants like ATZ without requiring additional energy input.</p> Graphical Abstract <p></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

Engineering a High-Performance Co/MPC Catalyst via Microwave-Assisted Pyrolysis for Rapid Atrazine Elimination through PMS Activation

  • 期刊论文

  • 发表日期：

    2026年5月22日

查看全文
  • Mei Wang,
  • Tong Wu,
  • Xianghai Song,
  • Quan Bu,
  • Bingliang Zhou

摘要

This study presents a high-performance cobalt catalyst supported on microwave-pyrolyzed biochar (Co/MPC) for efficient peroxymonosulfate (PMS) activation to degrade atrazine (ATZ). The microwave-assisted pyrolysis (MWP) technique yielded biochar (MPC) with superior textural properties—specifically, a significantly higher specific surface area (214.18 m2/g) and pore volume (0.46 cm3/g)—compared to conventionally pyrolyzed biochar (BC). This enhanced porous structure facilitated the uniform dispersion of ~5 nm cobalt nanoparticles, resulting in the highly active Co/MPC catalyst. The Co/MPC+PMS system achieved over 99% ATZ degradation within just 4 min, outperforming its conventionally prepared counterpart (Co/BC) (77%). The catalyst demonstrated robust performance across a range of PMS dosages and pollutant concentrations, with minimal interference from coexisting inorganic ions (Cl−, SO42−, NO3−, H2PO4−, HCO3−) and organic humic acid in the Co/MPC+PMS system. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis identified hydroxyl radicals (⋅OH) and sulfate radicals (SO₄⋅⁻) as the dominant reactive species responsible for the rapid degradation. This work highlights the significant advantage of microwave-assisted synthesis in creating advanced carbon-metal catalysts and offers a highly efficient, stable, and practical solution for the remediation of persistent organic pollutants like ATZ without requiring additional energy input.

Graphical Abstract