构建空洞的多微反应器与纳米封闭的微环境通过氧硫酸盐激活ofloxacin降解:高价值-Oxo物种的演变
Lin Zhang1, Juanjuan Qi1, Wenxing Chen2
1MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, P. R. China.
Environmental science & technology
|September 11, 2023
概括
这项研究开发了空洞的多微反应器,用于使用过氧硫酸盐激活降解奥洛素. 三重外的基于Co的空心微球催化剂在先进的氧化过程中显示出高效率和稳定性.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 抗生素耐药性是一个日益严重的全球性问题,需要有效的方法来从水中去除药物污染物,如牛素 (OFX).
- 先进的氧化过程 (AOP) 为污染物降解提供了有前途的途径,但催化剂的效率和稳定性仍然是挑战.
- 空洞的多层结构提供了独特的微环境,可以提高催化性能.
研究的目的:
- 构建和评估空心多微反应器,通过过氧硫酸盐 (PMS) 激活有效降解牛素.
- 研究结构调整,氧空缺和高价值-氧物种在催化机制中的作用.
- 评估催化剂在各种水矩阵和连续流系统中的稳定性和性能.
主要方法:
- 作为微反应器的三重外基于Co的空心微球 (TS-Co/HM) 的合成.
- 在芬顿类AOP中使用PMS激活对奥洛素的降解实验.
- 包括现场拉曼光谱和理论计算在内的表征技术用于识别催化中间体 (Co(IV) O).
- 在各种水样和连续流量条件下进行稳定性测试.
主要成果:
- 该TS-Co/HM催化剂实现了高的OFX降解率 (0.598分−1),显著优于Co3O4纳米颗粒.
- 结构性修改促进了氧气空缺,促进了高价值反应性氧 (Co(IV) O物种的形成.
- 催化剂在存在无机/有机抑制剂和真实水样时表现出极好的稳定性.
- 纳米封闭的微环境增强了反应剂的丰富和催化剂的利用.
结论:
- 具有纳米封闭环境的空心多层微反应器通过PMS激活对OFX降解有效.
- 催化活性归因于Co(IV) O物种的形成和利用,由结构缺陷增强.
- 开发的催化剂由于其在连续流系统中的稳定性和效率,显示了在水处理中实际应用的潜力.
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