On the Use of MOFs and ALD Layers as Nanomembranes for the Enhancement of Gas Sensors Selectivity

Weber, Matthieu; Graniel, Octavio; Balme, Sébastien; Miele, Philippe; Bechelany, Mikhaël

doi:10.3390/nano9111552

Cited by 11 publications

(6 citation statements)

References 122 publications

(164 reference statements)

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“…The porous nature of this family of compounds as well as their structural diversity has led to a wide range of potential applications being investigated. The properties of these materials which could lead to applications include: gas adsorption/separation [ 1 , 2 , 3 , 4 ], catalysis [ 5 , 6 ], drug delivery and biomedicine [ 7 , 8 ], photoluminescence sensors [ 9 , 10 , 11 , 12 , 13 ], magnetism [ 14 , 15 , 16 , 17 ], proton conductivity [ 18 , 19 , 20 , 21 ], or mechanical energy storage, among others [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. Prior to its further use for an application, significant effort must be devoted to the characterization of the thermal and mechanical stability of MOFs [ 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Thermal and Mechanical Stimuli on the Behavior of Al-CAU-13 Metal–Organic Framework

et al. 2020

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The response of the metal–organic framework aluminum-1,4-cyclohexanedicarboxylate or Al-CAU-13 (CAU: Christian Albrecht University) to the application of thermal and mechanical stimuli was investigated using synchrotron powder X-ray diffraction (SPXRD). Variable temperature in situ SPXRD data, over the range 80–500 K, revealed a complex evolution of the structure of the water guest containing Al-CAU-13•H2O, the dehydration process from ca. 310 to 370 K, and also the evolution of the guest free Al-CAU-13 structure between ca. 370 and 500 K. Rietveld refinement allowed this complexity to be rationalized in the different regions of heating. The Berman thermal Equation of State was determined for the two structures (Al-CAU-13•H2O and Al-CAU-13). Diamond anvil cell studies at elevated pressure (from ambient to up to ca. 11 GPa) revealed similarities in the structural responses on application of pressure and temperature. The ability of the pressure medium to penetrate the framework was also found to be important: non-penetrating silicone oil caused pressure induced amorphization, whereas penetrating helium showed no plastic deformation of the structure. Third-order Vinet equations of state were calculated and show Al-CAU-13•H2O is a hard compound for a metal–organic framework material. The mechanical response of Al-CAU-13, with tetramethylpyrazine guests replacing water, was also investigated. Although the connectivity of the structure is the same, all the linkers have a linear e,e-conformation and the structure adopts a more open, wine-rack-like arrangement, which demonstrates negative linear compressibility (NLC) similar to Al-MIL-53 and a significantly softer mechanical response. The origin of this variation in behavior is attributed to the different linker conformation, demonstrating the influence of the S-shaped a,a-conformation on the response of the framework to external stimuli.

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Section: Introductionmentioning

confidence: 99%

Influence of Thermal and Mechanical Stimuli on the Behavior of Al-CAU-13 Metal–Organic Framework

et al. 2020

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“…The resistance-based hydrogen sensors are devised with a metal oxide semiconductor (MOS) layer on an insulating platform, two electrodes, and a heating material often placed under the sensing layer . The resistance of the sensing layer would change linearly when exposed to different concentrations of hydrogen gas, within a specific range and time, and also according to the surface area and the microstructure of the sensing layer . A hydrogen sensor was designed using mesoporous In 2 O 3 synthesized through hydrothermal reaction and calcination processes to generate large surface areas.…”

Section: Benchmarking With Other Hydrogen Detection Techniquesmentioning

confidence: 99%

Hydrogen Biosensing: Prospects, Parallels, and Challenges

Garg

Mishra

Vega

et al. 2023

Ind. Eng. Chem. Res.

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The implementation of hydrogen, as a renewable and clean energy source, has the potential to replace fossil fuels and to decarbonize hard-to-abate sectors, enabling sustainable development with a lower environmental footprint. At concentrations higher than 4 vol %, hydrogen is, however, highly flammable and real-time monitoring and detection are required to ensure safe operation during production, storage, transportation, and utilization of it. Hydrogen sensors shall, therefore, be both efficient and sensitive to operate across a wide range of concentrations and mixtures with other gases. Current commercial hydrogen sensors are primarily dependent on electrochemical, heat-conductance, or calorimetric technologies, being intrinsically developed from noble and expensive metals or complex setups. Portable hydrogen sensing technologies for personal protective equipment in remote and confined areas shall, however, require them to be selective and specific, light weight, and mobile, as well as self-regenerating and stable for the long-term. An emerging type of hydrogen sensor involves biosensing through biological pathways whereby hydrogenase is extracted from microbial communities and used for carrying out the reversible hydrogen oxidation reaction, allowing sensitivity down to 0.4 ppb in complex environments. Microbial communities innately use hydrogen for metabolic activities related to growth and energy synthesis. This review highlights the recent developments in hydrogen biosensing while presenting viable options for on-site and fast hydrogen detection, allowing timely action for mitigating risks related to hydrogen leakages and inflammation. Beyond discussing the mechanisms and materials used to generate hydrogen biosensors, a critical comparison with conventional hydrogen and other gaseous sensors is presented, highlighting the opportunities and remaining challenges in this field.

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“…Still, selectivity and zero cross-sensitivity continue to be fundamental research challenges after many years of research. 115–118 The conventional techniques or sensors available to detect trace gas suffer from many drawbacks and selectivity. However, good selectivity from a simple, robust, and cost-effective gas sensor or technique is still the researcher's dream.…”

Section: Techniques For the Improvement Of Selectivitymentioning

confidence: 99%

Selectivity in trace gas sensing: recent developments, challenges, and future perspectives

Barik

Pradhan

2022

Analyst

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On the Use of MOFs and ALD Layers as Nanomembranes for the Enhancement of Gas Sensors Selectivity

Cited by 11 publications

References 122 publications

Influence of Thermal and Mechanical Stimuli on the Behavior of Al-CAU-13 Metal–Organic Framework

Influence of Thermal and Mechanical Stimuli on the Behavior of Al-CAU-13 Metal–Organic Framework

Hydrogen Biosensing: Prospects, Parallels, and Challenges

Selectivity in trace gas sensing: recent developments, challenges, and future perspectives

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