Synthesis and characterization of tetraethylene pentamine functionalized MIL-101(Cr) for removal of metals from water

Rastkari, Noushin; Akbari, Somaye; Brahmand, Masoud Binesh; Takhvar, Azra; Ahmadkhaniha, Reza

doi:10.1007/s40201-021-00728-4

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…The metal removal ability of MIL-101(Cr) can be enhanced by functionalization. Rastkari et al [ 140 ] reported that the adsorption and removal ability of tetraethylenepentamine (TEPA)-grafted MIL-101(Cr) on metals in an aqueous solution was investigated. It was shown that the grafted TEPA-MIL-101(Cr) had an excellent adsorption capacity for Pb 2+ , Cu 2+ , Cd 2+ , and Co 2+ in an aqueous solution, and the adsorption capacity exceeded that of the original MIL-101(Cr) by a factor of eight.…”

Section: Applicationsmentioning

confidence: 99%

Advances in Metal-Organic Frameworks MIL-101(Cr)

Zou

Dong

Zhao

2022

IJMS

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MIL-101(Cr) is one of the most well-studied chromium-based metal–organic frameworks, which consists of metal chromium ion and terephthalic acid ligand. It has an ultra-high specific surface area, large pore size, good thermal/chemical/water stability, and contains unsaturated Lewis acid sites in its structure. Due to the physicochemical properties and structural characteristics, MIL-101(Cr) has a wide range of applications in aqueous phase adsorption, gas storage and separation, and catalysis. In this review, the latest synthesis of MIL-101(Cr) and its research progress in adsorption and catalysis are reviewed.

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Section: Applicationsmentioning

confidence: 99%

Advances in Metal-Organic Frameworks MIL-101(Cr)

Zou

Dong

Zhao

2022

IJMS

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“…Luo et al reported the selective removal of lead ions using ethylenediamine-functionalized MIL-101(Cr) [28]. Furthermore, Rastkari et al reported that the adsorption capacity of tetraethylenepentamine (TEPA)-grafted MIL-101(Cr) for Pb 2+ , Cu 2+ , Cd 2+ , and Co 2+ ions in an aqueous solution was eight times that of a pristine MOF [29]. Thompson et al reported the synthesis of a water-insoluble, polydentate trisbenzimidazole derivative known as tris(2-benzimidazolylmethyl) amine, abbreviated as NTB, in 1977 [30].…”

Section: Introductionmentioning

confidence: 99%

Tris(2-benzimidazolyl)amine (NTB)-Modified Metal-Organic Framework: Preparation, Characterization, and Mercury Ion Removal Studies

Rallapalli

Choi

Moradi

et al. 2023

Water

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Heavy metal ions (HMIs) are exceedingly hazardous to both humans and the environment, and the necessity to eliminate them from aqueous systems prompted the development of novel materials. In this study, tris(2-benzimidazolylmethyl)amine (NTB) was impregnated into MIL-101-(Cr) metal-organic framework using an incipient wetness impregnation approach, and the ability of the composite material to adsorb Hg2+ ions from the water was examined. The synthesized materials were analyzed with several physico-chemical techniques such as powder X-ray diffraction, elemental analysis, scanning electron microscopy, thermogravimetric analysis, nitrogen sorption isotherms at 77 K, and X-ray photoelectron spectrometry. MIL-101-NTB quickly adsorbs 93.9% of Hg2+ ions within 10 min from a 10.0 ppm single ion solution. A better fit of the kinetic data to a pseudo-second-order model validated the chemisorption of Hg2+ ions on MIL-101-NTB. The experimental data fitted well with the Langmuir isotherm model, and the maximum adsorption capacity obtained at 125 ppm initial concentration was 111.03 mg/g. Despite the presence of other competing ions (Cu2+, Pb2+, and Cd2+), high Hg2+ ions removal efficiency (99.6%, 1.0 ppm initial concentration) was maintained in the diverse ion batch adsorption studies. A 0.2 M EDTA solution could desorb the Hg2+ ions, and cyclic Hg2+ ions sorption studies indicated that MIL-101-NTB might have a high Hg2+ ions removal efficiency for at least five consecutive cycles. Based on the FTIR and XPS analyses, Hg2+ ions chelation by NTB molecules and electrostatic interactions between Hg2+ ions and carboxylate groups in MIL-101-NTB are plausible mechanisms for Hg2+ ions adsorption.

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