Scholarlink

<p>Peroxymonosulfate (PMS) activation by cobalt manganese spinel (Co-Mn) is always unsatisfactory due to the interference of co-existing anions in water. In this study, we used a sulfate-modification strategy to prepare a sea urchin-like Co-Mn catalyst (CoMn<sub>2</sub>O<sub>4</sub>-S) with abundant oxygen vacancies for counteracting the interference of anions in pollutant degradation. Compared with the conventional Co-Mn catalyst (CoMn<sub>2</sub>O<sub>4</sub>), CoMn<sub>2</sub>O<sub>4</sub>-S exhibited higher resistance to poisoning of NO<sub>3</sub><sup>−</sup>, Cl<sup>−</sup>, and SO<sub>4</sub><sup>2−</sup> in PMS activation involved phenol degradation. Additionally, H<sub>2</sub>PO<sub>4</sub><sup>−</sup> could even enhance phenol degradation by 150.2% for CoMn<sub>2</sub>O<sub>4</sub>-S/PMS system, in contrast to its induced 18.5% inhibition to CoMn<sub>2</sub>O<sub>4</sub>/PMS system. It was demonstrated that vacancies and sea urchin structure alleviated catalyst agglomeration for preserving catalytic sites and promoted catalyst surface modulation for radical diffusion, contributing to the enhanced stability in saline water. This work provides a facile strategy for overcoming the negative effects of co-existing anions on heterogeneous PMS-activation based water treatment.</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

Vacancies and sea urchin structure protect cobalt manganese spinel from anion poisoning in peroxymonosulfate activation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月19日

查看全文
  • Hui Jia,
  • Rumeng Liu,
  • Tenglong Huang,
  • Fulin Wang,
  • Shanshan Dong,
  • Huihui Dai,
  • Zhenxing Zeng,
  • Dingding Tang,
  • Xiaodong Wang,
  • Suhua Chen

摘要

Peroxymonosulfate (PMS) activation by cobalt manganese spinel (Co-Mn) is always unsatisfactory due to the interference of co-existing anions in water. In this study, we used a sulfate-modification strategy to prepare a sea urchin-like Co-Mn catalyst (CoMn2O4-S) with abundant oxygen vacancies for counteracting the interference of anions in pollutant degradation. Compared with the conventional Co-Mn catalyst (CoMn2O4), CoMn2O4-S exhibited higher resistance to poisoning of NO3−, Cl−, and SO42− in PMS activation involved phenol degradation. Additionally, H2PO4− could even enhance phenol degradation by 150.2% for CoMn2O4-S/PMS system, in contrast to its induced 18.5% inhibition to CoMn2O4/PMS system. It was demonstrated that vacancies and sea urchin structure alleviated catalyst agglomeration for preserving catalytic sites and promoted catalyst surface modulation for radical diffusion, contributing to the enhanced stability in saline water. This work provides a facile strategy for overcoming the negative effects of co-existing anions on heterogeneous PMS-activation based water treatment.