Barton Heather F, Davis Alexandra K, Parsons Gregory N
Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27606, United States.
ACS Appl Mater Interfaces. 2020 Apr 1;12(13):14690-14701. doi: 10.1021/acsami.9b20910. Epub 2020 Feb 6.
Metal-organic framework (MOF) fibrous composites were synthesized in a variety of methods in attempt to incorporate the highly effective reactivity of MOFs into a more facile and applicable format. Recent advances have demonstrated incorporating a metal oxide nucleation surface or reactive layer promotes conformal, well-adhered MOF growth on substrates. These materials have demonstrated promising reactivity in capturing or degrading chemical warfare agents and simulants. Here, we examine the mechanisms for MOF nucleation from metal oxide thin films to explore why some metal oxide sources are better suited for one synthesis mechanism over another. We isolate metal oxide extent of hydroxylation as an indicative factor as to whether the film serves as a nucleation promoter or may be converted directly to the MOF thin films. MOF-525 growth on AlO, TiO, and ZnO coated fibers is demonstrated to corroborate these findings and used to degrade chemical warfare agent simulant dimethyl-4-nitrophenyl phosphate.
金属有机框架（MOF）纤维复合材料通过多种方法合成，旨在将MOF的高效反应活性整合到更简便且适用的形式中。最近的进展表明，引入金属氧化物成核表面或反应层可促进MOF在基底上的共形、良好附着生长。这些材料在捕获或降解化学战剂及模拟剂方面已展现出有前景的反应活性。在此，我们研究从金属氧化物薄膜形成MOF的成核机制，以探究为何某些金属氧化物源比其他源更适合一种合成机制。我们将金属氧化物的羟基化程度作为一个指示因素，以判断该薄膜是作为成核促进剂，还是可直接转化为MOF薄膜。在涂覆有AlO、TiO和ZnO的纤维上生长MOF-525被证明可证实这些发现，并用于降解化学战剂模拟剂磷酸二甲基-4-硝基苯酯。
