Effect of diol isomer/water mixtures on the stability of Zn-MOF-74

González-Galán, Carmen; Balestra, Salvador R. G.; Luna-Triguero, Azahara; Madero-Castro, Rafael M.; Zaderenko, Ana Paula; Calero, Sofı́a

doi:10.1039/d0dt03787g

Cited by 5 publications

(4 citation statements)

References 51 publications

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“…The effect of humidity on the decreased adsorption capacity ( Q max ) of the Cu(mIm)-1.6 fabric may be due to (1) masking of the adsorption sites by water vapor and/or (2) a change of the Cu(mIm) crystalline structure by a highly reactive SO x species generated from the reaction with water. Typically, many MOF-like crystals are vulnerable to high humidity, and their crystallinity is affected by moisture. − In order to determine whether the deteriorated adsorption performance is a result of crystal changes, XRD analysis was conducted on Cu(mIm)-1.6 exposed to 90% RH for 60 min without SO 2 gas, and the sample was denoted as Cu(mIm)-1.6W. From XRD analysis, the diffraction patterns of Cu(mIm)-1.6W were not any different from those of Cu(mIm)-1.6 (Figure b), indicating that the crystalline structure of Cu(mIm) was not affected by the water vapor only.…”

Section: Resultsmentioning

confidence: 99%

Copper 2-Methylimidazole Nanostructure-Based Colorimetric Fabric Sensor for Real-Time Monitoring of Ambient Sulfur Oxides

Lee

Yoo

Kim

2022

ACS Appl. Nano Mater.

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For effective protection from exposure to hazardous gases, a facile strategy of real-time gas monitoring is highly needed. In this study, a novel colorimetric indicator that allows the visual detection of ambient sulfur oxides (SO x ) is developed, applying copper 2-methylimidazole [Cu(mIm)] nanocrystals to a cellulose fabric. By optimization of the molar ratio of copper to mIm, the properties of the treated fabric are improved for the Cu(mIm) loading capacity, gas adsorption performance, and colorimetric response. It is revealed that the role of environmental humidity is crucial for effective adsorption and chromatic reaction of Cu(mIm) because the hydrated Cu(mIm) surface facilitates SO 2 adsorption, producing reactive species of HSO 3 − or SO 4 2−. Those reactive SO x species cause the structural transformation of Cu(mIm) and ultimately lead to a chromatic response. The chromatic reaction takes place close to the breakthrough concentration of 5 ppm, demonstrating that the Cu(mIm) fabric can be applied as a practical service-life indicator, timely signaling the replacement time of protective materials. It is anticipated that the proposed strategy offers an effective SO x monitoring solution for application in various fields that call for facile gas detection.

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Section: Resultsmentioning

confidence: 99%

Copper 2-Methylimidazole Nanostructure-Based Colorimetric Fabric Sensor for Real-Time Monitoring of Ambient Sulfur Oxides

Lee

Yoo

Kim

2022

ACS Appl. Nano Mater.

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“…This accumulation of water vapor can have a significant impact on adsorption behavior. However, in the existing research, the influence of water on the adsorption of MOFs has mainly focused on aspects such as water stability of MOFs, 24 water adsorption, and water purification 25 . The influence of IWC on subsequent adsorption processes has been less explored.…”

Section: Introductionmentioning

confidence: 99%

Effect analysis of temperature and initial water content on the adsorption and separation of VOCs by ZIF‐8 based on molecular simulation

Li,

Zheng,

Huang

et al. 2024

J of Applied Polymer Sci

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Volatile organic compounds (VOCs) have seriously polluted the atmospheric environment and caused harmful effects on human beings, so it is imperative to control oil vapor emissions. Metal organic framework materials, as one of the porous materials, have a good application prospect in the field of gas adsorption separation. In this paper, the effects of temperature and initial water content (IWC) on the adsorption properties of methane (CH4), ethane (C2H6), ethylene (C2H4), propane (C3H8), and propylene (C3H6) by ZIF‐8 were studied by combining the large gauge Monte Carlo (GCMC) and ideal adsorption solution theory. The results show that the higher the temperature is, the lower the adsorption capacity is, the higher the threshold pressure is, and the single molecule interaction energy changes little with temperature. But pore volume is still the main influencing factor. The IWC also reduces the saturated adsorption capacity. Preloaded water molecules can enhance the electrostatic interaction at low pressure, thus affecting the adsorption heat and interaction energy of single molecules. Overall, these findings provide valuable mechanistic insights into the effects of temperature and IWC on the adsorption properties of ZIF‐8 for VOCs.

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“…Many MOFs exhibit structural instability even in the presence of trace water. − Generally, H 2 O molecules could break the coordination bonds of the metal ions and organic ligands by substituting ligands. Conversely, H + and OH – ionized from water molecules result in hydroxylated metals and protonated ligands, which utterly destroy MOF structures. , The collapse of the irreversible framework structure has become a detriment, reducing the actual desulfurization capacity. To solve this issue, (MOF-818)-on-(Cu-BTC) with a microporous interior and a mesoporous exterior has been achieved by our group .…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, H + and OH − ionized from water molecules result in hydroxylated metals and protonated ligands, which utterly destroy MOF structures. 33,34 The collapse of the irreversible framework structure has become a detriment, reducing the actual desulfurization capacity. To solve this issue, (MOF-818)-on-(Cu-BTC) with a microporous interior and a mesoporous exterior has been achieved by our group.…”

Section: ■ Introductionmentioning

confidence: 99%

Boosting the Adsorption Performance of Thiophenic Sulfur Compounds with a Multimetallic Dual Metal–Organic Framework Composite

Fang

Zou

et al. 2022

Langmuir

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Adsorptive desulfurization over metal−organic frameworks (MOFs) remains a challenge in maintaining good performance in the presence of water. Herein, multimetallic Fe/ Ni/Cu/Zn-(MIL-88B)-on-(MOF-5) is first achieved through phase-competition-driven growth technology. The adsorption performance of thiophene (Th), benzothiophene (BT), and dibenzothiophene (DBT) in model fuels is systematically investigated at mild temperature and follows the order Fe/Ni/Cu/Zn-(MIL-88B)-on-(MOF-5) > MOF-5 > MIL-88B. Excellent adsorptive activity is mainly ascribed to the associative effects of multimetal active sites, suitable pore sizes and shapes, acid−base interactions, and complexation. Meanwhile, MIL-88B exhibits a "brick-wall" effect and effectively enhances the water stability of Fe/Ni/ Cu/Zn-(MIL-88B)-on-(MOF-5) more than does MOF-5. Fe/Ni/Cu/Zn-(MIL-88B)-on-(MOF-5) exhibits superior stability even after being immersed in water for 5 days, maintaining 77, 77, and 81% of the initial DBT, BT, and Th uptake capacities. After five periods of regeneration, more than 90% of the desulfurization capacity of Fe/Ni/Cu/Zn-(MIL-88B)-on-(MOF-5) was recovered. This work provides a new strategy for the synthesis of desirable MOF-on-MOF, promoting its potential application to adsorption desulfurization.

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Effect of diol isomer/water mixtures on the stability of Zn-MOF-74

Abstract: In this paper we study both the stabilization and the collapse of Zn-MOF-74 in the presence of water and the three benzenediol isomers to improve the understanding of non-water resistant MOF stabilization pathways.

Cited by 5 publications

References 51 publications

Copper 2-Methylimidazole Nanostructure-Based Colorimetric Fabric Sensor for Real-Time Monitoring of Ambient Sulfur Oxides

Copper 2-Methylimidazole Nanostructure-Based Colorimetric Fabric Sensor for Real-Time Monitoring of Ambient Sulfur Oxides

Effect analysis of temperature and initial water content on the adsorption and separation of VOCs by ZIF‐8 based on molecular simulation

Boosting the Adsorption Performance of Thiophenic Sulfur Compounds with a Multimetallic Dual Metal–Organic Framework Composite

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