scholarly journals Shaping and silane coating of a diamine-grafted metal-organic framework for improved CO2 capture

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Jong Hyeak Choe ◽  
Jeoung Ryul Park ◽  
Yun Seok Chae ◽  
Dae Won Kim ◽  
Doo San Choi ◽  
...  
Keyword(s):  
Alkyl Chain ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
Working Capacity ◽  
High Mechanical Strength ◽  
Silane Coating ◽  
Metal Organic ◽  
Alumina Sol ◽  
Scalable Synthesis ◽  
Organic Framework

AbstractAlthough metal-organic framework (MOF) powders can be successfully shaped by conventional methods, postsynthetic functionalization of the shaped MOFs remains almost unexplored, yet is required to overcome intrinsic limitations, such as CO2 adsorption capacity and stability. Here, we present a scalable synthesis method for Mg2(dobpdc) MOF and its shaped beads, which are obtained by using a spray dry method after mixing Mg2(dobpdc) powders with alumina sol. The synthesized MOF/Al beads have micron-sized diameters with a moderate particle size distribution of 30–70 μm. They also maintain a high mechanical strength. N-ethylethylenediamine (een) functionalization and coating with long alkyl chain silanes results in een-MOF/Al-Si, which exhibits a significant working capacity of >11 wt% CO2 capture and high hydrophobicity. The een-MOF/Al-Si microbeads retain their crystallinity and improved CO2 uptake upon exposure to humid conditions for three days at a desorption temperature of 140 °C.

scholarly journals Polymer-Assisted Modification of Metal-Organic Framework MIL-96 (Al): Influence on Particle Size, Crystal Morphology and Perfluorooctanoic Acid (PFOA) Removal

2020 ◽  
Author(s):  
Luqman Hakim Mohd Azmi ◽  
Daryl R. Williams ◽  
Bradley P. Ladewig
Keyword(s):  
Particle Size ◽  
Crystal Morphology ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
Perfluorooctanoic Acid ◽  
Water Soluble ◽  
Water Soluble Polymer ◽  
Metal Organic ◽  
Organic Framework

<div><b>Abstract</b></div><div>A new synthesis method was developed to prepare an aluminum-based metal organic framework (MIL-96) with a larger particle size and different crystal habits. A low cost and water-soluble polymer, hydrolyzed polyacrylamide (HPAM), was added in varying quantities into the synthesis reaction to achieve >200% particle size enlargement with controlled crystal morphology. The modified adsorbent, MIL-96-RHPAM2, was systematically characterized by SEM, XRD, FTIR, BET and TGA-MS. Using activated carbon (AC) as a reference adsorbent, the effectiveness of MIL-96-RHPAM2 for perfluorooctanoic acid (PFOA) removal from water was examined. The study confirms stable morphology of hydrated MIL-96-RHPAM2 particles as well as a superior PFOA adsorption capacity (340 mg/g) despite its lower surface area, relative to standard MIL-96. MIL-96-RHPAM2 suffers from slow adsorption kinetics as the modification significantly blocks pore access. The strong adsorption of PFOA by MIL-96-RHPAM2 was associated with the formation of electrostatic bonds between the anionic carboxylate of PFOA and the amine functionality present in the HPAM backbone. Thus, the strongly held PFOA molecules in the pores of MIL-96-RHPAM2 were not easily desorbed even after eluted with a high ionic strength solvent (500 mM NaCl). Nevertheless, this simple HPAM addition strategy can still chart promising pathways to impart judicious control over adsorbent particle size and crystal shapes while the introduction of amine functionality onto the surface chemistry is simultaneously useful for enhanced PFOA removal from contaminated aqueous systems.<br></div>

scholarly journals Polymer-Assisted Modification of Metal-Organic Framework MIL-96 (Al): Influence on Particle Size, Crystal Morphology and Perfluorooctanoic Acid (PFOA) Removal

2020 ◽  
Author(s):  
Luqman Hakim Mohd Azmi ◽  
Daryl R. Williams ◽  
Bradley P. Ladewig
Keyword(s):  
Particle Size ◽  
Crystal Morphology ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
Perfluorooctanoic Acid ◽  
Water Soluble ◽  
Water Soluble Polymer ◽  
Metal Organic ◽  
Organic Framework

<div><b>Abstract</b></div><div>A new synthesis method was developed to prepare an aluminum-based metal organic framework (MIL-96) with a larger particle size and different crystal habits. A low cost and water-soluble polymer, hydrolyzed polyacrylamide (HPAM), was added in varying quantities into the synthesis reaction to achieve >200% particle size enlargement with controlled crystal morphology. The modified adsorbent, MIL-96-RHPAM2, was systematically characterized by SEM, XRD, FTIR, BET and TGA-MS. Using activated carbon (AC) as a reference adsorbent, the effectiveness of MIL-96-RHPAM2 for perfluorooctanoic acid (PFOA) removal from water was examined. The study confirms stable morphology of hydrated MIL-96-RHPAM2 particles as well as a superior PFOA adsorption capacity (340 mg/g) despite its lower surface area, relative to standard MIL-96. MIL-96-RHPAM2 suffers from slow adsorption kinetics as the modification significantly blocks pore access. The strong adsorption of PFOA by MIL-96-RHPAM2 was associated with the formation of electrostatic bonds between the anionic carboxylate of PFOA and the amine functionality present in the HPAM backbone. Thus, the strongly held PFOA molecules in the pores of MIL-96-RHPAM2 were not easily desorbed even after eluted with a high ionic strength solvent (500 mM NaCl). Nevertheless, this simple HPAM addition strategy can still chart promising pathways to impart judicious control over adsorbent particle size and crystal shapes while the introduction of amine functionality onto the surface chemistry is simultaneously useful for enhanced PFOA removal from contaminated aqueous systems.<br></div>

A metal–organic framework functionalized with piperazine exhibiting enhanced CH4 storage

2017 ◽  
Vol 5 (1) ◽  
pp. 349-354 ◽  
Author(s):  
Mingxing Zhang ◽  
Cong Chen ◽  
Qian Wang ◽  
Wensheng Fu ◽  
Kunlin Huang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Storage Capacity ◽  
Metal Organic Framework ◽  
Methane Storage ◽  
Working Capacity ◽  
Metal Organic ◽  
Organic Framework ◽  
Ch4 Storage

NJU-Bai 19, the first cycloaliphatic ring (piperazine) functionalized MOF-505 analogue, exhibits a notably high methane storage capacity of 246 cm3 (STP) cm−3 (at room temperature and 65 bar) and a working capacity of 185 cm3 (STP) cm−3.

scholarly journals Minute/instant-MOFs: versatile, high quality, ultrafast, scalable production at room temperature

2019 ◽  
Vol 1 (9) ◽  
pp. 3379-3382 ◽  
Author(s):  
Vijayan Srinivasapriyan
Keyword(s):  
Chemical Industry ◽  
Room Temperature ◽  
Metal Organic Framework ◽  
High Quality ◽  
Metal Organic ◽  
Scalable Synthesis ◽  
Scalable Production ◽  
Organic Framework

The material demand for metal organic framework (MOF) production necessitates advances in their expedient and scalable synthesis at room temperature, which is pivotal for the chemical industry.

Polymer–metal–organic framework core–shell framework nanofibers via electrospinning and their gas adsorption activities

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7078-7085 ◽  
Author(s):  
Ming Gao ◽  
Lingwang Zeng ◽  
Jun Nie ◽  
Guiping Ma
Keyword(s):  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
Core Shell ◽  
Polymer Metal ◽  
Metal Organic ◽  
Organic Framework

In this study, we have fabricated of PAN@ZIF-8 core–shell nanofibers by combining electrospinning techniques and the MOF synthesis method.

A microporous metal–organic framework with polarized trifluoromethyl groups for high methane storage

2015 ◽  
Vol 51 (79) ◽  
pp. 14789-14792 ◽  
Author(s):  
Ganggang Chang ◽  
Bin Li ◽  
Hailong Wang ◽  
Zongbi Bao ◽  
Taner Yildirim ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Metal Organic Framework ◽  
Methane Storage ◽  
Working Capacity ◽  
Metal Organic ◽  
Trifluoromethyl Groups ◽  
Organic Framework

A novel NbO-type metal–organic framework UTSA-88a with polarized trifluoromethyl groups exhibits a notably high methane storage capacity of 248 cm3 (STP) cm−3 and a working capacity of 185 cm3 (STP) cm−3.

scholarly journals Scalable synthesis and post-modification of a mesoporous metal-organic framework called NU-1000

2015 ◽  
Vol 11 (1) ◽  
pp. 149-162 ◽  
Author(s):  
Timothy C Wang ◽  
Nicolaas A Vermeulen ◽  
In Soo Kim ◽  
Alex B F Martinson ◽  
J Fraser Stoddart ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic ◽  
Scalable Synthesis ◽  
Post Modification ◽  
Mesoporous Metal ◽  
Organic Framework

scholarly journals Visible-Light-Mediated Photocatalytic Selective N-Methylation of Amines using CO2 under mild reaction condition via NH2-MIL-125 (Ti) MOF catalyst

2021 ◽  
Author(s):  
Jianguo liu ◽  
Xiuzhi Wei ◽  
Longlong Ma
Keyword(s):  
Visible Light ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
Selective Synthesis ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
Reaction Condition ◽  
Photocatalytic System ◽  
Metal Organic ◽  
Organic Framework

We herein describe a facile synthesis method of novel NH2-MIL-125 (Ti) metal organic framework as a photocatalyst, and the photochemical system was firstly developed for the direct N-methylation of amines under very mild reaction conditions of one bar CO2 and NaBH4. According to the optimization of reaction conditions, the selective synthesis of methylamines is achieved in good to excellent conversion and selectivity using visible light mediated photocatalytic system.

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