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电子束和热稳定的MFM-300(M) 金属有机框架的电子束和热稳定性

Eu-Pin Tien^1,2, Guanhai Cao³, Yinlin Chen³

¹Department of Materials, The University of Manchester Oxford Road Manchester M13 9PL UK sarah.haigh@manchester.ac.uk.

Journal of materials chemistry. A

|September 20, 2024

概括

基于的金属有机框架 (MOF) 与,和同类相比,具有优越的电子束稳定性. 这种增强的稳定性与阳离子惰性和光催化剂寿命相关.

科学领域:

材料科学材料科学材料科学
化学化学化学
纳米技术纳米技术

背景情况:

金属有机框架 (MOF) 是具有多种应用的晶体多孔材料.
了解MOF在各种条件下的稳定性对于其实际使用至关重要.

研究的目的:

为了研究同结构MFM-300(M) 金属有机框架 (M = Al,Ga,In,Cr) 的热和电子束稳定性.
为了将观察到的稳定性与材料特性和光催化性能相关联.

主要方法:

电子束照射实验以确定结构降解的关键电子流动.
在高温下进行现场同步射线X射线衍射以评估热稳定性.
分析结构变化,包括通道尺寸和结晶度.

主要成果:

MFM-300(Cr) 显示出异常的电子束稳定性 (1111 e− Å− 2),明显高于13组的MOF.
电子束诱导的降解是异构的,并且独立于晶体大小.
热降解温度对于MFM-300 ((Al) (605°C) 是最高的,对于Cr,Ga和In类似物则降低.
在电子束辐射下,MFM-300 ((Cr) 保持了结晶性,但在电子束辐射下缩小到10%.

结论:

电子束稳定性的MFM-300(M) MOFs尺度与阴离体惰性.
这些发现提供了关于MOF在辐射和热应力下结构完整性的见解.
在MFM-300(Cr) 中增强的电子束稳定性与改善的光催化剂寿命相关.

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