Andrés M A, Fontaine P, Goldmann M, Serre C, Roubeau O, Gascón I
Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain; Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC and Universidad de Zaragoza, 50009 Zaragoza, Spain.
Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France.
J Colloid Interface Sci. 2021 May 15;590:72-81. doi: 10.1016/j.jcis.2021.01.030. Epub 2021 Jan 16.
Metal-organic framework (MOF) activation is crucial for the use of MOFs in several applications and solvent-exchange process is a necessary step in many activation methods. In this contribution, we have explored in situ MOF monolayer film formation at the air-water interface. Nanoparticles (NPs) of the Al trimesate MIL-96(Al) retain chloroform into their micropores, which considerably diminishes the CO adsorption capacity of MOF films. However, a solvent-exchange process between chloroform and water increases CO film adsorption capacity by 30%. Total Reflection X-Ray Fluorescence (TRXF) allows studying the kinetics of this process at the air-water interface, that strongly depends on the NP size. The conclusions derived from in situ studies allow optimizing the ex situ activation procedure of MIL-96(Al) films deposited onto quartz crystal microbalance (QCM) substrates in order to maximize CO and methanol adsorption.
金属有机框架（MOF）的活化对于MOF在多种应用中的使用至关重要，而溶剂交换过程是许多活化方法中的必要步骤。在本论文中，我们探索了在气-水界面原位形成MOF单层膜的过程。均苯三甲酸铝MIL-96(Al)纳米颗粒（NPs）将氯仿保留在其微孔中，这大大降低了MOF膜对CO的吸附能力。然而，氯仿和水之间的溶剂交换过程使CO膜的吸附能力提高了30%。全反射X射线荧光（TRXF）能够研究该过程在气-水界面的动力学，这在很大程度上取决于NP的尺寸。原位研究得出的结论有助于优化沉积在石英晶体微天平（QCM）基底上的MIL-96(Al)膜的非原位活化程序，以实现对CO和甲醇吸附的最大化。
