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>

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 Room Temperature Synthesis and Characterizations of Cu-MOF using Natural Polysaccharide as Potential Organic Linker

2019 ◽  
Vol 8 (4) ◽  
pp. 6490-6498
Keyword(s):  
Metal Organic Framework ◽  
Synthesis Method ◽  
Gum Arabic ◽  
Water Soluble ◽  
Synthesis Process ◽  
X Ray ◽  
Natural Polysaccharide ◽  
Metal Organic ◽  
Organic Linker ◽  
Organic Framework

In this study, copper-based metal-organic framework was successfully synthesized using natural polysaccharide, gum Arabic (gA, Acacia Senegal) as potential organic linker by adopting the synthesis method from Misran et al. with some modifications. The copper-based metal-organic framework (CuMOF) was obtained from the combination of copper salt, natural polysaccharide, and terephthalic acid (H2BDC) at various ratio. The synthesis process was done with the addition of triethylamine (TEA) as catalyst. X-ray Diffraction (XRD) pattern exhibited the presence of a prominent peak assigned to (200), (400), (511), (731), (773), and (882) crystal plane almost similar to the octahedral copper-based MOF-199. Field Emission Scanning Electron Microscopy (FESEM) shown an agglomeration and flaky particle. Energy Dispersive X-Ray Spectrometry (EDX) shown three main elements exist inside the Cu-MOF which is carbon (C), copper (Cu), and oxygen (O). This study showed the possibility of natural polysaccharide as new, non-toxic, water soluble linker. Thermogravimetric Analysis (TGA) analyses of as-synthesized Cu-MOF exhibited three different weight losses when heated to ca. 600oC. The first mass decrease was due to loss of water content followed by the loss of organic moieties inside the Cu-MOF framework and the last was due to the collapse of MOF’s structure leaving metal oxide as the final residue. The Fourier-Transform Infrared Spectroscopy (FTIR) spectra suggested strong absorption band at ca. 900 – 1200 cm-1 attributable to C-O bonding, at ca. 1045 cm-1 attributable to C-H bonding originating from gum Arabic, at ca. 1500 – 1600 cm-1 from the organic linker benzene ring, and at ca. 3200 – 3500 cm-1 from hydrogen bonding. These results suggested that natural polysaccharide of gum Arabic exhibited the possibility to become a new, non-toxic, renewable linker for the MOF materials and played a significant role in metal-organic framework formation.

A binuclear Co-based metal-organic framework towards efficient oxygen evolution reaction

2021 ◽  
Author(s):  
Ning Liu ◽  
Qiaoqiao Zhang ◽  
Jingqi Guan
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Research Interest ◽  
Metal Organic ◽  
Organic Framework

Seeking for low-cost and high-performance electrocatalysts for oxygen evolution reaction (OER) has drawn enormous research interest in the last few years. Reported herein is the topotactic construction of a binuclear...

Application of a Zn(ii) based metal–organic framework as an efficient solid-phase extraction sorbent for preconcentration of plasticizer compounds

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40211-40218 ◽  
Author(s):  
Elham Tahmasebi ◽  
Mohammad Yaser Masoomi ◽  
Yadollah Yamini ◽  
Ali Morsali
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Phase Extraction ◽  
Metal Organic ◽  
Organic Framework

A solid-phase extraction (SPE) sorbent, a Zn(ii) based metal–organic framework, was prepared via a simple, solventless, green and a low-cost mechanosynthesis process.

scholarly journals Buffered Coordination Modulation as a Means of Controlling Crystal Morphology and Molecular Diffusion in an Anisotropic Metal–Organic Framework

2021 ◽  
Vol 143 (13) ◽  
pp. 5044-5052
Author(s):  
Kristen A. Colwell ◽  
Megan N. Jackson ◽  
Rodolfo M. Torres-Gavosto ◽  
Sudi Jawahery ◽  
Bess Vlaisavljevich ◽  
...  
Keyword(s):  
Crystal Morphology ◽  
Molecular Diffusion ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Anisotropic Metal ◽  
Organic Framework

scholarly journals Particle size studies to reveal crystallization mechanisms of the metal organic framework HKUST-1 during sonochemical synthesis

2017 ◽  
Vol 34 ◽  
pp. 365-370 ◽  
Author(s):  
Mitchell R. Armstrong ◽  
Sethuraman Senthilnathan ◽  
Christopher J. Balzer ◽  
Bohan Shan ◽  
Liang Chen ◽  
...  
Keyword(s):  
Particle Size ◽  
Metal Organic Framework ◽  
Sonochemical Synthesis ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Particle size effects in the kinetic trapping of a structurally-locked form of a flexible MOF

CrystEngComm ◽  
2016 ◽  
Vol 18 (22) ◽  
pp. 4172-4179 ◽  
Author(s):  
Oliver M. Linder-Patton ◽  
Witold M. Bloch ◽  
Campbell J. Coghlan ◽  
Kenji Sumida ◽  
Susumu Kitagawa ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Effects ◽  
Metal Organic Framework ◽  
Particle Size Effects ◽  
Metal Organic ◽  
Flexible Metal ◽  
Kinetic Trapping ◽  
2D To 3D ◽  
Organic Framework

Controlling the particle size of a flexible metal–organic framework demonstrates that a 2D to 3D transformation gives a kinetically-trapped, structurally-locked form.

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