Sensitive and Reversible Detection of Methanol and Water Vapor by In Situ Electrochemically Grown CuBTC MOFs on Interdigitated Electrodes

Sachdeva, Sumit; Venkatesh, M.; Mansouri, Brahim El; Wei, Jia; Bossche, A.; Kapteijn, Freek; Zhang, Guo Qi; Gascón, Jorge; Smet, Louis C. P. M. de; Sudhölter, Ernst J. R.

doi:10.1002/smll.201604150

Cited by 36 publications

(27 citation statements)

References 47 publications

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“…18,19 It is crucial to note the distinct difference between MOF powder synthesis and lm formation. 17,18,22,24,31,35,[61][62][63] Our results show that a decrease in the current is not detrimental but can result in the formation of more uniform lms. Cu-BTC-coated Cu HFs prepared without the supporting electrolyte are promising candidates for future applications such as gas separation or catalysis.…”

Section: Effect Of Applied Potentialmentioning

confidence: 61%

Electroforming of a metal–organic framework on porous copper hollow fibers

et al. 2019

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Section: Effect Of Applied Potentialmentioning

confidence: 61%

Electroforming of a metal–organic framework on porous copper hollow fibers

et al. 2019

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“…[120][121][122] MOF-derived materials, which have partially inherited characteristic of MOFs, especially N-doped porous carbons through pyrolysis, were also considered as one of the most promising candidates as the substrate for stabilizing SACs. [123][124][125] In 2008, Xu and co-workers first reported the preparation of nanoporous carbon by using MOF as a template. [104] In 2016, Wu and Li et al proposed a general synthesis strategy for SACs with atomically dispersion and high mass loading, and expanded it to a series of SA/N-C catalysts (Figure 6a).…”

Section: Sacs On Carbon Supportsmentioning

confidence: 99%

General Design Concept for Single‐Atom Catalysts toward Heterogeneous Catalysis

et al. 2021

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state of the catalyst, it can be classified as three types: homogeneous catalyst, heterogeneous catalyst, and biological (enzyme) catalyst. [4,5] Among them, the heterogeneous catalyst is the most important one because of its strong stability under severe conditions (e.g., high temperature, high pressure) and easy recovery from the reactants and products. [6,7] Heterogeneous catalyst is usually in the form of welldispersed metal particles and clusters, each of which may have multiple active sites with different properties. [8] It is well known that the coordination environment and electronic structure of metal-centered sites are the decisive factors in affecting the catalytic performance. However, traditional heterogeneous catalysts usually suffer from the insufficient utilization of atom, because only a small fraction of surface metal atoms can participate in the reaction. To reduce the cost of heterogeneous catalysis and improve the utilization efficiency of active metals in the heterogeneous catalyst, to rationally design and develop catalytic materials with good activity, durability and selectivity is now of greatest concern.Last decades, the gradual development of various precision instruments and detection methods has greatly stimulated the interests in the observation and exploration of microcosms. [9][10][11][12][13][14][15][16][17][18] Therefore, nanocatalysis, a new era of catalytic research, has been introduced and promoted by the rapid development of nanoscience. Studies have shown that the performance of catalyst can be determined by the size of catalytic metal particles. By controlling the nucleation and growth processes at nanoscale, nanoparticles (NPs) with high surface-to-volume ratios can be obtained. [19][20][21][22][23] Moreover, the abundant coordination unsaturated surface atoms located at edges, corners, and steps along with specific morphology of nanoparticles both have an important effect on the adsorption, desorption and activation process of small molecule reactants, which can effectively modulate the catalytic efficiency. [24] To obtain high atomic utilization efficiency, the particle of active metal is continuously reduced from nanoscale to sub-nanometer-scale or even atomic scale. [25,26] To this end, single-atom catalysts (SACs) bring new opportunities to the study in molecularly and atomically catalytic mechanisms, which require the accurate structure design at atomic scale.Compared with NPs catalysts, the metal species of SACs are uniformly dispersed on the support with maximum atom dispersion. [5,7,[27][28][29] Furthermore, the catalytic activities As a new and popular material, single-atom catalysts (SACs) exhibit excellent activity, selectivity, and stability for numerous important reactions, and show great potential in heterogeneous catalysis due to their high atom utilization efficiency and the controllable characteristics of the active sites. The composition and coordination would determine the geometric and electronic structures of SACs, and thus greatly influence the catal...

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“…Detection of alcohols with thin film MOFs has been studied by measuring the changes in permittivity of the material using capacitive interdigitated electrode (IDE) transducers [14]. Cu paddlewheel MOFs using benzene-1,3,5-tricarboxylic acid as organic linkers (CuBTC) grown on IDE capacitor and NH2-MIL-53(Al) MOFs in Matrimid polymer matrix coated on IDEs show capacitive responses towards the detection of methanol at room temperature [14,15]. Owing to its simplicity of fabrication, compatibility with the complementary metal-oxide semiconductor (CMOS) process and availability of sensitive capacitance measurement systems, IDE capacitor transducers provide a reliable platform for sensing studies.…”

Section: Introductionmentioning

confidence: 99%

A Low-Power MEMS IDE Capacitor with Integrated Microhotplate: Application as Methanol Sensor using a Metal-Organic Framework Coating as Affinity Layer

Venkatesh

Sachdeva

Mansouri

et al. 2019

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Capacitors made of interdigitated electrodes (IDEs) as a transducer platform for the sensing of volatile organic compounds (VOCs) have advantages due to their lower power operation and fabrication using standard micro-fabrication techniques. Integrating a micro-electromechanical system (MEMS), such as a microhotplate with IDE capacitor, further allows study of the temperature- dependent sensing response of VOCs. In this paper, the design, fabrication, and characterization of a low-power MEMS microhotplate with IDE capacitor to study the temperature-dependent sensing response to methanol using Zeolitic imidazolate framework (ZIF-8), a class of metal-organic framework (MOF), is presented. A Titanium nitride (TiN) microhotplate with aluminum IDEs suspended on a silicon nitride membrane is fabricated and characterized. The power consumption of the ZIF-8 MOF-coated device at an operating temperature of 50 ∘ C is 4.5 mW and at 200 ∘ C it is 26 mW. A calibration methodology for the effects of temperature of the isolation layer between the microhotplate electrodes and the capacitor IDEs is developed. The device coated with ZIF-8 MOF shows a response to methanol in the concentration range of 500 ppm to 7000 ppm. The detection limit of the sensor for methanol vapor at 20 ∘ C is 100 ppm. In situ study of sensing properties of ZIF-8 MOF to methanol in the temperature range from 20 ∘ C to 50 ∘ C using the integrated microhotplate and IDE capacitor is presented. The kinetics of temperature-dependent adsorption and desorption of methanol by ZIF-8 MOF are fitted with double-exponential models. With the increase in temperature from 20 ∘ C to 50 ∘ C, the response time for sensing of methanol vapor concentration of 5000 ppm decreases by 28%, whereas the recovery time decreases by 70%.

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Sensitive and Reversible Detection of Methanol and Water Vapor by In Situ Electrochemically Grown CuBTC MOFs on Interdigitated Electrodes

Cited by 36 publications

References 47 publications

Electroforming of a metal–organic framework on porous copper hollow fibers

Electroforming of a metal–organic framework on porous copper hollow fibers

General Design Concept for Single‐Atom Catalysts toward Heterogeneous Catalysis

A Low-Power MEMS IDE Capacitor with Integrated Microhotplate: Application as Methanol Sensor using a Metal-Organic Framework Coating as Affinity Layer

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