过氧单碳酸盐通过Co纳米颗粒被限制在金属有机框架中的激活,以便在不同的实际水矩阵中有效降解抗生素
Bo-Tao Zhang1, Zihan Yan1, Juanjuan Zhao1
1College of Water Sciences, Beijing Normal University, Beijing 100875, China.
Water research
|July 22, 2023
概括
本研究引入了用于高级氧化过程的新型空心双金属金属有机框架 (Co@MOFs). 这些Co@MOF表现出高稳定性和活性,在使用过氧单碳酸盐 (PMC) 降解硫甲醇,为水污染补救提供了有希望的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 传统的先进氧化过程面临着短命激素和催化剂不稳定的挑战.
- 开发强大高效的催化系统对于有效的水资源整治至关重要.
研究的目的:
- 用封装的纳米粒子合成和表征空心双金属金属有机框架 (Co@MOFs).
- 评估Co@MOFs在激活多氧单碳酸盐 (PMC) 进行硫甲醇降解的催化性能.
- 通过使用Co@MOF/PMC系统研究硫甲醇的稳定性,反应机制和降解途径.
主要方法:
- 具有黄黄结构的Co@MOFs的溶热合成.
- 使用X射线衍射和光电子光谱学进行表征.
- 使用Co@MOF与各种过氧化物 (PMC,H2O2,PMS,persulfate) 的硫甲的降解实验.
- 扫描实验和电子自旋共振 (ESR) 谱学以确定反应性氧物种.
- 降解中间体的识别和降解途径的建议.
主要成果:
- 与对照组相比,Co@MOFs表现出与封装的Co纳米颗粒组成的黄结构,显示出增强的催化活性和稳定性.
- Co@MOF/PMC 系统在硫甲醇降解方面显示出高效率 (>94%) ,性能优于其他过氧化物系统.
- 由于纳米封闭效应,该系统在实际的水矩阵中保持了高性能,金属漏最小.
- 基和碳酸盐基是主要的,超氧化和单片氧也对降解有所贡献.
- 确定了六种降解途径,超过80%的中间体药被破坏.
结论:
- 开发的Co@MOFs利用纳米封闭和PMC激活,为硫甲醇降解提供了高效和稳定的催化系统.
- 这种方法为水污染修复中的先进氧化过程提供了一种新且高效的策略.
- 关键中间结构的破坏表明它们适合随后的生物处理.
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