Metal-Organic-Frameworks: Low Temperature Gas Sensing and Air Quality Monitoring

Abstract

As an emerging class of hybrid nanoporous materials, metal-organic frameworks (MOFs) have attracted significant attention as promising multifunctional building blocks for the development of highly sensitive and selective gas sensors due to their unique properties, such as large surface area, highly diversified structures, functionalizable sites and specific adsorption affinities. Here, we provide a review of recent advances in the design and fabrication of MOF nanomaterials for the low-temperature detection of different gases for air quality and environmental monitoring applications. The impact of key structural parameters including surface morphologies, metal nodes, organic linkers and functional groups on the sensing performance of state-of-the-art sensing technologies are discussed. This review is concluded by summarising achievements and current challenges, providing a future perspective for the development of the next generation of MOF-based nanostructured materials for low-temperature detection of gas molecules in real-world environments.

Hybrid learning method based on feature clustering and scoring for enhanced COVID-19 breath analysis by an electronic nose

“…Nonetheless, the robustness and repeatability of such organic materials are still questionable. Therefore, despite their good sensitivity and selectivity, the organic ligands used for gas sensors can quickly degrade resulting in low long-term device stability [80] , [81] , [82] . For the results toward COVID-19 assessments, the obtained sensitivity value of GeNose C19 is comparable with that of aeoNose.…”

Advances with Metal Organic Framework based nanomaterials in 4th industrial revolution

“…At ambient temperature, a zeolitic imidazolate framework-8 (ZIF-8) particle-loaded ZnO nanorod hybrid demonstrates better sensitivity and selectivity for H2S as a gas sensor [69]. MOFs are also used to detect inorganic gases like-for NO2 detection Tb-MOF, Eu-MOF, MOF-A, Y-DOBDC, Ni-MOF-74, In2O3/ZIF-8, Cu3(HHTP)2/Fe2O3, Pd@Cu3(HHTP)2, Pt@Cu3(HHTP)2, Cu3(HHTP)2, ZIF-8; for H2S detection MIL-100(In), fum-fcu-MOF, ZIF-8/ZnO, MOF-5/CS/IL, Cu3(HHTP)2, Ni3(HHTP)2, NiPc-Ni, NiPc-Cu; for SO2 detection MOF-5-NH2, Eu-BDC-NH2, UiO-66-NH2, MFM-300(In), NH2-UiO-6, Ni-MOF/-OH-SWNTs; for CO2 detection ZIF-8, Mg-MOF-74, NH2-UiO-66(Zr), Cu3(HIB)2, SnO2@ZIF-67; for NH3 detection MIL-124@Eu 3+/ Al2O3, NDC-Y-fcu-MOF, NiPc-M, Cu-BHT, Cu3(HITP)2, Cu-HHTP, Pd-Co@IRMOF, Zn (NA), SNNU-88, Cu3(BTC)2/GO is used [70].…”

MOF/Polymer-Integrated Multi-Hotspot Mid-Infrared Nanoantennas for Sensitive Detection of CO2 Gas

“…Among them, the exploration of MOFs for sensing applications is challenging and involves multidisciplinary technology on account of the requirement for signal transduction to detect changes within MOFs [ 15 ]. Despite challenges, the exceptional properties of MOFs such as large surface area, extensive porosity, and high crystallinity should constitute important advantages over other candidate classes of gas sensing materials [ 16 ]. Thanks to the great efforts invested in the field of MOFs, breakthroughs have been made in signal transduction technologies, including optical (photoluminescence [ 17 ], localized surface plasmon resonance [ 18 ], solvochromicity [ 19 ], etc.)…”