| 伏佳乐,吕小凡,罗乙娲,王震.化学通报,2025,88(3):318-327. |
| 基于Co-Nx配位的多级结构催化剂活化过氧乙酸高效降解罗丹明B |
| Multi-level structure catalyst based on Co-Nx coordination activates peracetic acid to efficiently degrade rhodamine B |
| 投稿时间：2024-10-14 修订日期：2024-11-19 |
| DOI： |
| 中文关键词: 过氧乙酸 高级氧化? 非均相催化 罗丹明B? 有机自由基 |
| 英文关键词:Peracetic Acid, Advanced Oxidation Process, Heterogeneous Catalysis, Rhodamine B, Organic Radicals |
| 基金项目:国家自然科学基金项目(52374350)和天津市水质科学与技术重点实验室开放研究基金项目(TJKLAST-PT-2021-06)资助 |
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| 中文摘要: |
| 采用一种基于钴氮配位的非均相型催化材料 (Co/NCNHP) 激活过氧乙酸 (PAA) 用于高效降解罗丹明B (RhB)。构建的Co/NCNHP/PAA体系对pH、温度的适用范围较宽，抗环境变化能力较强。通过扫描电镜和透射电镜证实了该催化剂内部存在由空心纳米碳、碳纳米管和钴纳米颗粒共存的多级结构。经五次循环实验后，该体系对目标污染物的去除率仍保持在82%以上。经过使用电感耦合等离子体质谱仪对反应过程中及反应结束后的溶液进行详细检测，Co离子浸出远低于标准限值。自由基清除实验表明，有机自由基(CH3C(O)O·和CH3C(O)OO·)和羟基自由基(·OH)是降解RhB的主要活性物质。该研究为水处理技术发展提供了新参考。 |
| 英文摘要: |
| A cobalt-nitrogen coordination-based heterogeneous catalyst (Co/NCNHP) was utilized to activate peracetic acid (PAA) for the efficient degradation of Rhodamine B (RhB). The Co/NCNHP-PAA system exhibited a wide range of applicability across pH and temperature variations, demonstrating strong resilience to environmental challenges. Structural analysis using scanning and transmission electron microscopy revealed the hierarchical configuration of the catalyst, composed of hollow carbon nanospheres, carbon nanotubes, and cobalt nanoparticles. After five cycles of experimental use, the Rhodamine B removal rate remained above 82%. Detailed analysis of the reaction solution before and after the degradation process using inductively coupled plasma mass spectrometry indicated minimal cobalt leaching. Radical scavenging experiments identified organic radicals (CH?C(O)OO·and CH?C(O)O·) and hydroxyl radicals (·OH) as the primary active species responsible for RhB degradation. This study offers valuable insights for the development of advanced water treatment technologies. |
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