Metal-Organic Frameworks (MOFs) Thin Films: An Emerging Platform for Gas Membranes and Sensing Applications
14:00 - 14:30
Level 0, between bld. 4 and 5
The quest for growing Metal-Organic Frameworks (MOFs) as thin films and integrating them into thin film-based applications is gaining more and more interest in the last decade. The potential applications of MOFs thin films are directly correlated to the unique structural characteristics and properties of MOFs over conventional porous solids. Due to their hybrid character and modular nature, MOFs are regarded as a new generation of porous materials with significant prospects for addressing current challenges pertinent to energy and environmental sustainability. Their unique tunability, which is not readily accessible in conventional porous materials (e.g., purely inorganic zeolites), offers great potential for their effective integration and exploration in various applications like gas storage, gas separation, catalysis, sensing, drug release, and many others.
In the past years several synthesis schemes have been developed for the fabrication of porous MOF thin films coatings supported on various substrates; like solvo-thermal and liquid phase-epitaxy (LPE) approach. Accordingly, our group among others is exploring various strategies for the fabrication of MOFs thin films and their prospective use in various kinds of application like sensing and membranes. The fabrication and properties of the first sod-ZMOF thin-film membrane, that exhibits a favorable permeation selectivity toward carbon dioxide over relevant industrial gases such as H2, N2 and CH4, and it is mainly governed by favorable CO2 adsorption will be also highlighted. The application of MOFs for sensing toxic gases through the fabrication of an advanced sensor for the detection of Hydrogen Sulfide andammonia (NH3) at room temperature, using thin films of rare-earth metal (RE)-based metal-organic framework (MOF) will be also shown. This unique MOF-based sensor is made via the in situ growth of fcu-MOF thin film on a capacitive interdigitated electrode. The sensor showed a remarkable detection sensitivity for H2S and NH3 at concentrations down to ppb and ppm respectively. The fcu-MOF sensor exhibits a highly desirable detection selectivity towards H2S and NH3 vs. CH4, NO2, H2, and C7H8 as well as an outstanding sensing stability as compared to other reported MOFs.