基于Zr的金属有机框架的内部和外部表面修改,用于清除微量二烯
Jia-Ao Lv1, Zhen-Ling Tang1, Yu-Hui Liu1
1Beijing Key Laboratory for Green Catalysis and Separation, and Department of Chemical Engineering, Beijing University of Technology, Beijing 100124, China.
Inorganic chemistry
|February 16, 2024
概括
像这样的挥发性有机化合物 (VOC) 是有害的空气污染物. 这项研究开发了新的基于Zr的金属有机框架 (Zr-MOFs),通过修改其表面,即使在潮湿条件下,也能有效捕获微量.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 挥发性有机化合物 (VOC),特别是,是重要的空气污染物和人类健康危害.
- 开发有效的吸附剂,以从环境空气中去除微量是非常重要的.
- 金属有机框架 (MOF) 为气体吸附应用提供可调节的性能.
研究的目的:
- 调查四种基于Zr的金属有机框架 (Zr-MOF) 的烯吸附特性.
- 为了合成和表征新的异粒状Zr-MOFs与修饰的配体.
- 评估这些Zr-MOF在各种条件下捕获微量的性能,包括湿度.
主要方法:
- 合成四种Zr-MOFs:BUT-12,STA-26,BUT-12-Et和STA-26-Et,使用具有甲基或乙基功能群的三基碳酸干.
- 静态体积和动态突破实验来测量吸附.
- 在水溶液中进行稳定性测试.
- 用聚二甲基 (PDMS) 修改STA-26-Et的表面,以提高疏水性.
主要成果:
- 微的STA-26和STA-26-Et在低压下比中的BUT-12和BUT-12-Et更显著地增加了的吸收.
- STA-26-Et 显示出高吸附能力 (2.21 mmol/g 在 P/P0 = 0.001).
- 在潮湿条件下,STA-26-Et的烯捕获率降低了90%,但PDMS涂层的性能提高了两倍以上.
结论:
- 基于Zr的MOF,特别是像STA-26-Et这样的微孔的MOF,对于捕获微量烯是有效的.
- 表面修改,包括通过PDMS涂层增强疏水性,对于改善潮湿环境中的MOF性能至关重要.
- 这项研究为开发用于空气净化应用的先进吸附剂提供了洞察力.
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