Mercapto-decorated Zn-based metal-organic framework embedded nanofibrous membrane for oxo-anions treatment in aqueous solution

Kaur, Harpreet; Chandel, Sheshang Singh; Karmakar, Anirban; Sinha-Ray, Sumit; Krishnan, Venkata; Koner, Rik Rani

doi:10.1016/j.cej.2022.136212

“…[26] The excellent chemical and thermal stability of ZJU-620(Al) could be ascribed to the stable AlO 6 clusters because Al 3 + could form strong AlÀ O bonds with the O atoms of TMTA ligands. [27] Moreover, the methyl groups of TMTA ligands could not only protect the coordination of AlÀ O due to its hydrophobicity, [28] but also enhance the electron density of O atoms in TMTA ligands [18] to improve the stability of ZJU-620(Al).…”

Section: Methodsmentioning

confidence: 99%

A Novel Aluminum‐Based Metal‐Organic Framework with Uniform Micropores for Trace BTEX Adsorption

Hu

¹

,

Wu

²

,

Gong

³

et al. 2023

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Metal-organic frameworks (MOFs) are potential porous adsorbents for benzene, toluene, ethylbenzene and xylene (BTEX). A novel MOF, using low toxic aluminum (Al) as the metal, named as ZJU-620(Al), with uniform micropore size of 8.37 � 0.73 Å and specific surface area of 1347 m 2 g À 1 , was synthesized. It is constructed by one-dimensional rod-shaped AlO 6 clusters, formate ligands and 4,4',4''-(2,4,6-trimethylbenzene-1,3,5-triyl) tribenzoic ligands. ZJU-620(Al) exhibits excellent chemical-thermal stability and adsorption for trace BTEX, e.g., benzene adsorption of 3.80 mmol g À 1 at P/P 0 = 0.01 and 298 K, which is the largest one reported. Using Grand Canonical Monte Carlo simulations and Single-crystal X-ray diffraction analyses, it was observed that the excellent adsorption could be attributed to the high affinity of BTEX molecules in ZJU-620(Al) micropores because the kinetic diameters of BTEX are close up to the pore size of ZJU-620(Al).

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“…[26] The excellent chemical and thermal stability of ZJU-620(Al) could be ascribed to the stable AlO 6 clusters because Al 3 + could form strong AlÀ O bonds with the O atoms of TMTA ligands. [27] Moreover, the methyl groups of TMTA ligands could not only protect the coordination of AlÀ O due to its hydrophobicity, [28] but also enhance the electron density of O atoms in TMTA ligands [18] to improve the stability of ZJU-620(Al).…”

Section: Methodsmentioning

confidence: 99%

A Novel Aluminum‐Based Metal‐Organic Framework with Uniform Micropores for Trace BTEX Adsorption

Hu

¹

,

Wu

²

,

Gong

³

et al. 2023

Angewandte Chemie

3

0

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Metal-organic frameworks (MOFs) are potential porous adsorbents for benzene, toluene, ethylbenzene and xylene (BTEX). A novel MOF, using low toxic aluminum (Al) as the metal, named as ZJU-620(Al), with uniform micropore size of 8.37 � 0.73 Å and specific surface area of 1347 m 2 g À 1 , was synthesized. It is constructed by one-dimensional rod-shaped AlO 6 clusters, formate ligands and 4,4',4''-(2,4,6-trimethylbenzene-1,3,5-triyl) tribenzoic ligands. ZJU-620(Al) exhibits excellent chemical-thermal stability and adsorption for trace BTEX, e.g., benzene adsorption of 3.80 mmol g À 1 at P/P 0 = 0.01 and 298 K, which is the largest one reported. Using Grand Canonical Monte Carlo simulations and Single-crystal X-ray diffraction analyses, it was observed that the excellent adsorption could be attributed to the high affinity of BTEX molecules in ZJU-620(Al) micropores because the kinetic diameters of BTEX are close up to the pore size of ZJU-620(Al).

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“…This is because the introduced methyl groups create a hydrophobic microenvironment in the pores of Znbzc-2CH 3 , which leads to weak water vapor adsorption ability. [30] To verify this point, the water vapor breakthrough tests in Zn-bzc and Zn-bzc-2CH 3 MOF, as well as the n-C 4 H 10 breakthrough tests of Zn-bzc in dry and humid environments were performed. As shown in Figure 5c, water molecules cannot be captured by Zn-bzc-2CH 3 and instantaneously passed through the adsorbent column, while Zn-bzc maintained a continuous adsorption of water molecules with a retention time up to around 2100 s. The water adsorption isotherms show that Zn-bzc possesses a large water adsorption capacity of 235 cm 3 g À 1 while Zn-bzc-2CH 3 can hardly adsorb water molecules even in the high P/P 0 region (Figure S13).…”

Section: Angewandte Chemiementioning

confidence: 98%

Stepwise Engineering the Pore Aperture of a Cage‐like MOF for the Efficient Separation of Isomeric C4 Paraffins under Humid Conditions

Wang

¹

,

Xue

²

,

Zhu

³

et al. 2023

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The separation of isomeric C4 paraffins is an important task in the petrochemical industry, while current adsorbents undergo a trade‐off relationship between selectivity and adsorption capacity. In this work, the pore aperture of a cage‐like Zn‐bzc (bzc=pyrazole‐4‐carboxylic acid) is tuned by the stepwise installation methyl groups on its narrow aperture to achieve both molecular‐sieving separation and high n‐C4H10 uptake. Notably, the resulting Zn‐bzc‐2CH3 (bzc‐2CH3=3,5‐dimethylpyrazole‐4‐carboxylic acid) can sensitively capture n‐C4H10 and exclude iso‐C4H10, affording molecular‐sieving for n‐C4H10/iso‐C4H10 separation and high n‐C4H10 adsorption capacity (54.3 cm3 g−1). Breakthrough tests prove n‐C4H10/iso‐C4H10 can be efficiently separated and high‐purity iso‐C4H10 (99.99 %) can be collected. Importantly, the hydrophobic microenvironment created by the introduced methyl groups greatly improves the stability of Zn‐bzc and significantly eliminates the negative effect of water vapor on gas separation under humid conditions, indicating Zn‐bzc‐2CH3 is a new benchmark adsorbent for n‐C4H10/iso‐C4H10 separation.

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Mercapto-decorated Zn-based metal-organic framework embedded nanofibrous membrane for oxo-anions treatment in aqueous solution

Cited by 11 publications

References 66 publications

A Novel Aluminum‐Based Metal‐Organic Framework with Uniform Micropores for Trace BTEX Adsorption

A Novel Aluminum‐Based Metal‐Organic Framework with Uniform Micropores for Trace BTEX Adsorption

A Novel Aluminum‐Based Metal‐Organic Framework with Uniform Micropores for Trace BTEX Adsorption

Stepwise Engineering the Pore Aperture of a Cage‐like MOF for the Efficient Separation of Isomeric C4 Paraffins under Humid Conditions

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