用氧活性金属有机框架可逆捕获和释放Cl2和Br2
Yuri Tulchinsky1, Christopher H Hendon1, Kirill A Lomachenko2,3
1Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|March 29, 2017
概括
这项研究提出了一种新的金属有机框架 (MOF),用于安全地储存和释放和等有毒元素素. 该材料通过氧化还原机制可逆地捕获和释放这些危险化学物质,从而提高工业安全.
科学领域:
- 材料科学
- 无机化学
- 化学工程
背景情况:
- 元素和具有高度的毒性,腐蚀性和挥发性,这给储存和运输带来了重大挑战.
- 目前处理这些素的方法不足,需要开发更安全的替代品.
- 由于其可调节的结构和高表面积,金属有机框架 (MOF) 作为化学存储的固态材料具有潜力.
研究的目的:
- 开发一种强大的固态材料,用于安全储存和按需释放元素和.
- 调查基于的酸MOF用于可逆的素捕获和释放.
- 展示一种由氧化还原驱动的化学储存和热释放危险素的机制.
主要方法:
- 合成含有协调不和CO2离子的强酸金属有机框架 (MOF).
- 通过元素和对Co (II) 进行定量氧化,形成稳定的Co (III) - 键.
- 用热处理来诱导同溶性裂变的Co (III) -素键,释放元素素并再生Co (II).
- 在多次氧化-降解循环后评估MOF的结构完整性,结晶性和多孔性.
主要成果:
- 在MOF中定量氧化了元素素的CO (II) 离子,形成具有终端CO (III) -素结合的稳定的CO (III) 种.
- 热处理成功释放了通过Co(III) - 素键裂变和Co(II) 再生的元素素.
- MOF表现出很好的可回收性,在三次氧化减氧周期中保持其结构和多孔性.
- 这种材料在可逆化学储存和热释放元素素方面被证明是有效的.
结论:
- 一种基于的新型MOF可确保元素和的安全可逆储存和随时释放.
- 该材料通过一种包括CO2 /CO3转化和素结合的氧化还原机制运作.
- 这种MOF技术为提高化学工业的安全性和捕获其他危险气体提供了有前途的解决方案.
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