Preferential adsorption of ethane over ethylene on a Zr-based metal-organic framework: impacts of C-H···N hydrogen bonding

The separation of ethylene/ethane mixture using energy-efficient technologies is important but challenging. Here, we prepared a Zr-based metal-organic framework (MOF-545) possessing high Brunauer-Emmett-Teller (BET) surface area of 2265.4 m2/g, and...

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The Electrochemical Reduction of a Flexible Mn(II) Salen-Based Metal-Organic Framework

Dalton Transactions ◽

10.1039/d1dt02589a ◽

2021 ◽

Author(s):

Marcello B Solomon ◽

Carol Hua ◽

Bun Chan ◽

Tamara L Church ◽

Seth M Cohen ◽

...

Keyword(s):

Electrochemical Reduction ◽

Surface Area ◽

Metal Organic Framework ◽

Experimental Studies ◽

Bet Surface Area ◽

Salen Complex ◽

Computational Calculations ◽

Metal Organic ◽

Organic Framework

A new metal-organic framework (MOF) containing a Mn(II) salen complex (BET surface area = 967±6 m2 g−1) undergoes a reversible crystalline-to-amorphous transformation. Experimental studies and computational calculations show that the...

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In Situ Polymerization of Polypyrrole @ Aluminum Fumarate Metal–Organic Framework Hybrid Nanocomposites for the Application of Wastewater Treatment

Polymers ◽

10.3390/polym12081764 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1764

Author(s):

Sarah Zayan ◽

Ahmed Elshazly ◽

Marwa Elkady

Keyword(s):

Surface Area ◽

In Situ Polymerization ◽

Metal Organic Framework ◽

Oxidative Polymerization ◽

Absorption Spectrometry ◽

Hybrid Nanocomposites ◽

Bet Surface Area ◽

Metal Organic ◽

Organic Framework

Composite metal–organic frameworks combine large and accessible surface areas with low density and high stability. Herein, we present novel nanocomposites of polypyrrole/aluminum fumarate metal–organic framework (PPy/AlFu MOF), which were synthesized via in situ oxidative polymerization with the aim of MOF functionalization to enhance its thermal stability and increase the specific surface area so that these nanocomposites may be used as potential adsorbents. The synthesized nanocomposites were characterized by various techniques, such as powder X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy (FTIR). The successful functionalization of aluminum fumarate MOF was confirmed by FTIR, and the Brunauer–Emmett–Teller (BET) surface area of the PPy/MOF nanocomposite slightly increased from 795 to 809 m2/g. Thermogravimetric analysis data also show that the weight loss of the composite is up to 30% at temperatures up to 500 ℃. Remarkably, lead (50 ppm) sequestration using the composite was tested, and the atomic absorption spectrometry data demonstrate that PPy/MOF is a super-adsorbent for heavy metal ions. This work shows that the novel polymer–MOF composites are promising materials for the selective removal of lead from wastewater streams.

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A highly porous rht-type acylamide-functionalized metal–organic framework exhibiting large CO2 uptake capabilities

Chemical Communications ◽

10.1039/c6cc06734d ◽

2016 ◽

Vol 52 (88) ◽

pp. 12988-12991 ◽

Cited By ~ 37

Author(s):

Baishu Zheng ◽

Hang Wang ◽

Zhaoxu Wang ◽

Noriaki Ozaki ◽

Cheng Hang ◽

...

Keyword(s):

Ambient Temperature ◽

Surface Area ◽

Metal Organic Framework ◽

Bet Surface Area ◽

Co2 Uptake ◽

Metal Organic ◽

Highly Porous ◽

Organic Framework

We present here a highly porous rht-type acylamide-functionalized MOF (HNUST-5), which exhibits a high BET surface area of 3643 m2 g−1, large and selective CO2 adsorption at near ambient temperature.

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Removal of 4-chloro-2-methylphenoxyacetic acid from water by MIL-101(Cr) metal-organic framework: kinetics, isotherms and statistical models

Royal Society Open Science ◽

10.1098/rsos.201553 ◽

2021 ◽

Vol 8 (1) ◽

pp. 201553

Author(s):

Hamza Ahmad Isiyaka ◽

Khairulazhar Jumbri ◽

Nonni Soraya Sambudi ◽

Zakariyya Uba Zango ◽

Bahruddin Saad ◽

...

Keyword(s):

Surface Area ◽

Metal Organic Framework ◽

Bet Surface Area ◽

Gravimetric Analysis ◽

Ann Model ◽

Effective Removal ◽

Metal Organic ◽

Artificial Neural Network Ann ◽

Experimental Findings ◽

Organic Framework

Effective removal of 4-chloro-2-methylphenoxyacetic acid (MCPA), an emerging agrochemical contaminant in water with carcinogenic and mutagenic health effects has been reported using hydrothermally synthesized MIL-101(Cr) metal-organic framework (MOF). The properties of the MOF were ascertained using powdered X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and surface area and porosimetry (SAP). The BET surface area and pore volume of the MOF were 1439 m 2 g −1 and 0.77 cm 3 g −1 , respectively. Artificial neural network (ANN) model was significantly employed for the accurate prediction of the experimental adsorption capacity ( q e ) values with minimal error. A rapid removal of the pollutant (99%) was recorded within short time (approx. 25 min), and the reusability of the MOF (20 mg) was achieved up to six cycles with over 90% removal efficiency. The kinetics, isotherm and thermodynamics of the process were described by the pseudo-second-order, Freundlich and endothermic adsorption, respectively. The adsorption process is spontaneous based on the negative Gibbs free energy values. The significant correlation between the experimental findings and simulation results suggests the great potential of MIL-101(Cr) for the remediation of MCPA from water matrices.

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Theoretical hydrogen bonding calculations and proton conduction for Eu(iii)-based metal–organic framework

RSC Advances ◽

10.1039/d1ra01528a ◽

2021 ◽

Vol 11 (19) ◽

pp. 11495-11499

Author(s):

Lu Feng ◽

Tian-Yu Zeng ◽

Hao-Bo Hou ◽

Hong Zhou ◽

Jian Tian

Keyword(s):

Hydrogen Bonding ◽

Theoretical Calculation ◽

Proton Transport ◽

Metal Organic Framework ◽

Proton Conduction ◽

Transport Channel ◽

Proton Conducting ◽

Metal Organic ◽

Organic Framework

A water-mediated proton-conducting Eu(iii)-MOF has been synthesized, which provides a stable proton transport channel that was confirmed by theoretical calculation.

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