通过热驱动的旋转操纵,通过废水污泥衍生的原子-Fe集群/Fe-N4催化剂定制过氧酸 (PAA) 激活
Lin Gu1, Xiao Cao2, Haiyan Yang2
1School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 China.
Journal of colloid and interface science
|February 3, 2025
概括
一种新的过氧酸 (PAA) 调节策略将污水污泥转化为带有Fe集群的增强铁单原子催化剂 (Fe SAC). 这种催化剂通过PAA激活有效降解抗生素,主要是通过单片氧生成.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 催化剂是一种催化剂.
背景情况:
- 基于铁的催化剂,特别是Fe纳米集群和碳中的FeN4位点,对于催化应用是有效的.
- 一个关键的挑战是防止合成过程中铁聚合成纳米颗粒,从而降低了催化效率.
- 污水污泥 (SS) 是一个未充分利用的生物质资源,具有开发催化剂前体的潜力.
研究的目的:
- 使用一种新的调节策略,从污水污泥中开发一种增强的铁单原子催化剂 (Fe SAC).
- 研究铁活性位点的形成和结构,包括Fe集群和FeN4单元.
- 评估催化剂在过氧酸 (PAA) 引发的抗生素降解中的性能,并阐明降解机制.
主要方法:
- 使用过氧酸 (PAA) 和Fe2+来制造铁固定点的污水污泥调节.
- 条件化污泥的热处理 (热解) 以形成具有Fe集群 (FeN4-FeNCP@SBC) 的Fe单原子催化剂.
- 使用先进技术进行表征分析Fe站点结构,分散和含量.
- 使用PAA进行抗生素降解的催化测试,并通过扫除和电子自旋共振 (ESR) 分析活性氧物种 (ROS).
主要成果:
- 该PAA调节策略成功地阻止了铁聚合,产生了高散的Fe集群/Fe-N4位点 (FeN4-FeNCP@SBC) 含有高Fe含量 (>2.34%).
- 与未经处理的样本相比,FeN4-FeNCP@SBC催化剂在PAA激活的抗生素降解方面表现优越.
- 单片氧 (1O2) 被确定为主要的活性物种,其中O2和HO作为其生成的关键中间体.
结论:
- 开发的FeN4-FeNCP@SBC催化剂有效地利用污水污泥来创建先进的Fe单原子和少数原子集群站点.
- 催化剂在PAA激活的抗生素降解中表现出卓越的效率,由单片氧生产驱动.
- 该研究提供了一种可行的方法,用于将废弃物生物质转化为环境修复的高性能催化剂.
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