In-situ fabrication of Cu-BDC on a quartz crystal microbalance for methane sensing at room temperature

Park, Yangkyu; Homayoonnia, Setareh; Kim, Seonghwan; Kim, Hyeon Woo

doi:10.1007/s10847-021-01056-8

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…The isolated blue solids were characterized by SEM, PXRD, TGA, and FTIR spectra, as shown in Figures and S3. The morphology of the CuBDC MOFs samples synthesized from blue-dye polyester (Figure a) and the 50/50 mixture of red and blue-dye polyester fabrics (Figure b) appeared similar in the SEM images and exhibited a granular structure that qualitatively agrees with those of the reported literature. , All tested samples exhibited the same CuBDC crystal structure as reported by Wang et al . and others (Figure c). − The TGA thermograms indicated that the CuBDC MOF structures synthesized with dyed polyester fabrics showed a two-step weight loss pattern, similar to those of the CuBDC MOF samples synthesized with no-dye polyester fabrics (Figure d).…”

Section: Resultssupporting

confidence: 85%

“…8,9 One attractive upcycling target for H 2 BDC are carboxylatebased metal−organic frameworks (MOFs). MOFs have a wide range of applications including catalysis, 10 gas separation, 11 oil/ water separation, 12 gas storage, 13 sensing, 14 and drug delivery. 15 MOF synthesis often requires expensive raw materials, toxic organic solvents such as N,N-dimethylformamide (DMF), and harsh reaction conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

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Upcycling of Dyed Polyester Fabrics into Copper-1,4-Benzenedicarboxylate (CuBDC) Metal–Organic Frameworks

Azbell

Milner

et al. 2023

Ind. Eng. Chem. Res.

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We report on a pathway to synthesize metal− organic frameworks (MOFs) using discarded textiles as a raw material. Discarded objects made of poly(ethylene terephthalate) (PET) could be an inexpensive and globally available source for 1,4-benzenedicarboxylic acid (H 2 BDC), also known as terephthalic acid, a building block of carboxylate-based MOFs. Previous studies on using discarded PET to synthesize MOFs have mainly focused on PET bottles. In contrast, we demonstrate the use of dyed polyester fabrics as a raw material. Specifically, we report on a synthesis path for copper-1,4-benzenedicarboxylate (CuBDC) utilizing disodium terephthalate (Na 2 BDC) as a linker and on how we obtained the linker from depolymerized polyester fabrics. To facilitate coordination between the copper ions and Na 2 BDC and create a localized acidic environment that favors the synthesis of CuBDC MOFs rather than metal oxide byproducts, we added acetic acid to the copper precursor solution. The drop-sized pHcontrolled domain enabled the formation of CuBDC MOF crystals at room temperature and at a fraction of time shorter than traditional solvothermal methods. We confirmed the resulting MOF structures using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) spectroscopy, and our results were in quantitative agreement with previous reports. Furthermore, we used different copper salts as metal sources and different color-dyed polyester fabrics as linker sources, demonstrating the versatility of the proposed synthesis path. These results may open an avenue for using discarded textiles as a raw material and offer a more circular approach for managing textile waste.

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Section: Resultssupporting

confidence: 85%

Section: ■ Introductionmentioning

confidence: 99%

Upcycling of Dyed Polyester Fabrics into Copper-1,4-Benzenedicarboxylate (CuBDC) Metal–Organic Frameworks

Azbell

Milner

et al. 2023

Ind. Eng. Chem. Res.

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“…The unique characteristics of MOFs, distinguished by their ultrahigh surface area, tunable structures, diverse chemical functionality, and varied optical properties, position them as frontrunners in nanomaterial research. These crystalline networks, comprising metal ions coordinated with organic ligands, offer versatility that allows researchers to customize MOFs for numerous applications, such as gas storage, separation, catalysis, and sensing. − They are particularly promising for photodetection applications due to their high surface area and amenability to modification. The inclusion of MOFs in photodetector designs can enhance the spectral selectivity and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Photodetector Based on Bandgap-Engineered MOFs/CNFs Nanocomposites for Violet Light Detection

Homayoonnia,

Kim

2024

ACS Appl. Opt. Mater.

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An innovative strategy is introduced, integrating metal−organic frameworks (MOFs) and bare carbon nanofibers (CNFs) within a nanocomposite, to address the challenges related to the broad absorption spectrum of traditional photodetectors. This advancement aims to eliminate the need for additional filters or intricate surface patterning in traditional photodetectors to achieve spectral selectivity, which is associated with high costs, and to facilitate enhanced spectral selectivity in the visible range, thereby paving the way for their widespread commercial adoption. By strategically leveraging the inherent strengths of both MOFs and CNFs while addressing their individual limitations, our method not only resolves challenges related to 3D MOFs and CNFs in spectrally selective photodetection but also significantly enhances optoelectronic properties. The resulting nanocomposite exhibits spectrally selective detection of violet light in the visible range, achieving a significantly enhanced responsivity of 27 A/W, detectivity of 1.66 × 10 11 Jones, and high external quantum efficiency of 8215% at a low optical power intensity of 27 μW/cm 2 at room temperature. This approach holds significant promise to advance photodetection technology in various applications requiring high-performance and spectrally selective detectors.

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“…MOFs self-assemble via coordination bonds of metal nodes with organic ligands, presenting a novel class of thermally stable and chemically inert crystalline hybrid nanoporous material with active sites of varying electron affinity. Their permanent porosity, tunable pore size, and functionalizable internal pore surfaces are conducive to rendering enhanced chemical sensitivity and selectivity that has been explored at length. − As such, MOFs are being routinely investigated for detection of polar molecules, organic molecules, and ions. − However, only a few MOF-based CH 4 sensors have been reported so far, and the improvement in selectivity and sensitivity is still required before MOFs could be widely used as CH 4 sensors. − …”

Section: Introductionmentioning

confidence: 99%

MOF/MWCNT–Nanocomposite Manipulates High Selectivity to Gas via Different Adsorption Sites with Varying Electron Affinity: A Study in Methane Detection in Parts-per-Billion

2022

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Metal−organic frameworks (MOFs) present specific adsorption sites with varying electron affinity which are uniquely conducive to selective gas sensing but are typically large-band-gap insulators. On the contrary, multiwall carbon nanotubes (MWCNTs) exhibit superior mesoscopic transport exploiting strong electron correlations among sub-bands below and above the Fermi level at room temperature. We synergize them in a new class of nanocomposites based on zeolitic imidazolate framework-8 (ZIF-8) and report selective sensing of CH 4 in ∼10 parts-per-billion (ppb) with a determined limit of detection of ∼0.22 ppb, hitherto unprecedented. The observed selectivity to CH 4 over non-polar CO 2 , polar volatile organic compounds, and moisture has roots in competing electron-sharing mechanisms at its different adsorption sites. This important result provides a significant reference to guide future MOF-related composite research to achieve the best sensing performance. On molecular adsorption, MWCNTs facilitate electrical transport via manipulating the ZIF-8 band gap to show a p-type semiconductor behavior with lower activation energy to induce a measurable resistance change. Excellent repeatability and reversibility are shown. A carbon-engineered MOF composite has the potential to actuate similar selective response to low reactive gases via carrier manipulation in the energy band gap.

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In-situ fabrication of Cu-BDC on a quartz crystal microbalance for methane sensing at room temperature

Cited by 5 publications

References 23 publications

Upcycling of Dyed Polyester Fabrics into Copper-1,4-Benzenedicarboxylate (CuBDC) Metal–Organic Frameworks

Upcycling of Dyed Polyester Fabrics into Copper-1,4-Benzenedicarboxylate (CuBDC) Metal–Organic Frameworks

High-Performance Photodetector Based on Bandgap-Engineered MOFs/CNFs Nanocomposites for Violet Light Detection

MOF/MWCNT–Nanocomposite Manipulates High Selectivity to Gas via Different Adsorption Sites with Varying Electron Affinity: A Study in Methane Detection in Parts-per-Billion

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