Fabrication of ultrathin MIL-96(Al) films and study of CO2 adsorption/desorption processes using quartz crystal microbalance

Miguel A Andrés; M Benzaqui; C Serre; N Steunou; I Gascón

doi:10.1016/j.jcis.2018.02.058

Fabrication of ultrathin MIL-96(Al) films and study of CO₂ adsorption/desorption processes using quartz crystal microbalance

J Colloid Interface Sci. 2018 Jun 1:519:88-96. doi: 10.1016/j.jcis.2018.02.058. Epub 2018 Feb 19.

Authors

Miguel A Andrés¹, M Benzaqui², C Serre², N Steunou³, I Gascón⁴

Affiliations

¹ Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain; Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain.
² Institut Lavoisier de Versailles, 45 avenue de États-Unis, Bâtiment Lavoisier, 78035 Versailles Cedex, France; Institut des Matériaux Poreux de Paris, FRE 2000 CNRS Ecole Normale Supérieure de Paris, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, PSL Research University, 75005 Paris, France.
³ Institut Lavoisier de Versailles, 45 avenue de États-Unis, Bâtiment Lavoisier, 78035 Versailles Cedex, France.
⁴ Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain; Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain. Electronic address: igascon@unizar.es.

PMID: 29482100
DOI: 10.1016/j.jcis.2018.02.058

Abstract

This contribution reports the fabrication and characterization of ultrathin films of nanoparticles of the water stable microporous Al tricarboxylate metal organic framework MIL-96(Al). The preparation of MOF dispersions in chloroform has been optimized to obtain dense monolayer films of good quality, without nanoparticle agglomeration, at the air-water interface that can be deposited onto solid substrates of different nature without any previous substrate functionalization. The MOF studied shows great interest for CO₂ capture because it presents Al³⁺ Lewis centers and hydroxyl groups that strongly interact with CO₂ molecules. A comparative CO₂ adsorption study on drop-cast, Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) films using a Quartz Crystal Microbalance-based setup (QCM) has revealed that the CO₂ uptake depends strongly on the film fabrication procedure and the storage conditions. Noteworthy the CO₂ adsorption capacity of LB films is increased by 30% using a simple and green treatment (immersion of the film into water during 12 h just after film preparation). Finally, the stability of LB MOF monolayers upon several CO₂ adsorption/desorption cycles has been demonstrated, showing that CO₂ can be easily desorbed from the films at 303 K by flowing an inert gas (He). These results show that MOF LB monolayers can be of great interest for the development of MOF-based devices that require the use of very small MOF quantities, especially gas sensors.

Keywords: CO(2) adsorption/desorption; Langmuir-Blodgett (LB) films; MIL-96(Al); Metal organic framework (MOF); Nanoparticles (NPs); Quartz crystal microbalance (QCM); Reusable gas sensor.