Magnetic Nanoparticles@Metal-Organic Framework Composites as Sustainable Environment Adsorbents

Zhao, Gege; Qin, Nianqiao; Pan, Anlian; Wu, Xiaoyan; Peng, Chuanyi; Ke, Fei; Iqbal, Mudassar; Ramachandraiah, Karna; Zhu, Jing

doi:10.1155/2019/1454358

Cited by 41 publications

(32 citation statements)

References 54 publications

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“…Thus, it is necessary to remove MB and other hazardous dyes from industrial effluents. Metal oxide nanoparticles possess appreciable photocatalytic behavior against various coloring pigments 41 . The photocatalytic behavior of synthesized CuO NS against MB was examined under direct sunlight.…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities

Bibi

Iqbal

Wahab

et al. 2021

Sci Rep

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The studies of metal oxides in environmental remediation of chemical and biological pollutants are gaining colossal importance. Herein, we report the facile synthesis of multifunctional copper oxide nanosheets (CuO NS) using an aqueous extract of Rhazya stricta. The phytochemical investigation of R. stricta indicated the presence of saponins, tannins, and reducing sugars, responsible for the reduction and stabilization of CuO NS. A UV–Visible spectrophotometer initially confirmed the fabrication of CuO NS with specific Surface Plasmon Resonance at 294 nm. Field Emission Scanning Electron Microscopy (FE-SEM), Fourier-transform infrared spectroscopy FTIR, and XRD were further used to characterize the CuO NS. The obtained CuO NS were poly-dispersed with an average size of 20 nm. Interestingly these particles were aligned together in 3D cubical sheets layered above each other via self-assembly. The as-synthesized CuO NS showed enhanced antibacterial potential (17.63 mm, overall mean inhibition zone) in comparison to the known antibiotics (11.51 mm, overall mean inhibition zone) against both Solanaceous crop's wilt-causing bacteria (Ralstonia solanacearum and Clavibacter michiganensis). Furthermore, the appreciable photocatalytic potential of CuO NS has also been observed, causing 83% degradation of methylene blue (MB) upon solar irradiation. The synthesis methodology is devoid of any toxic waste or by-products. It could be used to produce eco-friendly CuO nanomaterial for industrial uses.

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Section: Resultsmentioning

confidence: 99%

Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities

Bibi

Iqbal

Wahab

et al. 2021

Sci Rep

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“…The superparamagnetic core-shell MOF Fe 3 O 4 @Ni-MOF was prepared by Step-by-Step method. [43] At first, Fe 3 O 4 magnetic nanoparticles were functionalized by mercaptoacetic acid (MAA). Next, functional MNPs were covered with MOF (Ni-MOF) after repeated cycles (Scheme 2).…”

Section: Introductionmentioning

confidence: 99%

“…The growth of Ni-MOF shell on the MAAfunctionalized Fe 3 O 4 core can be started by the metal ions binding to the MAA on the Fe 3 O 4 surface and then attaching the ligands from the solution. [43] The structural properties of synthesized Fe 3 O 4 @Ni-MOF were identified by FT-IR, thermogravimetric analysis (TGA), X-ray diffraction, TEM, and FESEM spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Janani

Abdoli‐Senejani

Isfahani

2021

Applied Organom Chemis

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A facile and efficient method was described for oxidation of some 3,5-diacyl or 3,5-diester 1,4-dihydropyridines using H 2 O 2 in the presence of superparamagnetic core-shell metal-organic framework Fe 3 O 4 @Ni-MOF. The Fe 3 O 4 @Ni-MOF has been obtained byStep-by-Step method in which magnetic Fe 3 O 4 magnetic nanoparticles were coated with Ni-MOF using a mercaptoacetic acid linker. The synthesized catalyst was characterized using thermogravimetric analysis, FT-IR spectroscopy, powder X-ray diffraction, field emission scanning electron microscopy and energy-dispersive X-ray analysis. The novel superparamagnetic core-shell metal-organic framework Fe 3 O 4 @Ni-MOF revealed high efficiency for oxidation of various 1,4-dihydropyridines using hydrogen peroxide. The Box-Behnken design matrix and the response surface method were applied to investigate the optimization of the reaction conditions. The conditions for optimal reaction yield and time were: amount of catalyst ≈17 mmol, temperature ≈78 C and amount of hydrogen peroxide ≈ 1 ml. A variety of 3,5-diacyl or 3,5-diester 1,4-dihydropyridines with different substituted functional groups have been converted to corresponding pyridines with good to excellent isolated yields using H 2 O 2 and Fe 3 O 4 @Ni-MOF. The catalyst was reused up to five times for the oxidation of 1,4-dihydropyridines without a significant loss in catalytic activity. The short reaction times, simplicity of method, good to excellent yields and reusability of catalyst were some advantages of the proposed procedure.

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“…To date, most MOF/iNP composites have been developed for catalysis. 29 However, within the field of pollutant removal, iNPs have been combined with MOFs to yield MOF/iNP adsorbents with added functionalities such as magnetism 30,31 or photocatalytic degradation. 12,32,33 Herein we report new composite microbeads (hereafter, iNP@MOF-Beads) for simultaneous removal of various metals from water, which we obtained by incorporating inorganic nanoparticles (iNPs) into MOFs via a one-step spray-drying process (Fig.…”

Section: Introductionmentioning

confidence: 99%

MOF-Beads Containing Inorganic Nanoparticles for the Simultaneous Removal of Multiple Heavy Metals from Water

Boix

Troyano

Garzón‐Tovar

et al. 2020

ACS Appl. Mater. Interfaces

105

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Pollution of water with heavy metals is a global environmental problem whose impact is especially severe in developing countries. Among water-purification methods, adsorption of heavy metals has proven to be simple, versatile and cost-effective. However, there is still a need to develop adsorbents with a capacity to remove multiple metal pollutants from the same water sample. Herein we report the complementary adsorption capacities of metal-organic frameworks (MOFs; here, UiO-66 and UiO-66(SH)2) and inorganic nanoparticles (iNPs; here, cerium-oxide NPs) into composite materials. These adsorbents, which are spherical microbeads generated in one step by continuous-flow spray-drying, efficiently and simultaneously remove multiple heavy metals from water, including As(III and V), Cd(II), Cr(III and VI), Cu(II), Pb(II) and Hg(II). We further show that these microbeads can be used as packing material in a prototype of a continuous-flow water treatment system, in which they retain their metal-removal capacities upon regeneration with a gentle acidic treatment. As proof-of-concept, we evaluated these adsorbents for purification of laboratory water samples prepared to independently recapitulate each of two strongly-polluted rivers: the Bone (Indonesia) and Buringanga (Bangladesh) rivers. In both cases, our microbeads reduced the levels of all the metal contaminants to below the corresponding permissible limits established by the World Health Organization (WHO). Moreover, we demonstrated the capacity of these microbeads to lower levels of Cr(VI) in a water sample collected from the Sarno River (Italy). Finally, to create adsorbents that could be magnetically recovered following their use in water purification, we extended our spraydrying technique to simultaneously incorporate two types of iNPs (CeO2 and Fe3O4) into UiO-66(SH)2, obtaining CeO2/Fe3O4@UiO-66-(SH)2 microbeads that adsorb heavy metals and are magnetically responsive.water by a magnet. Given their ready formation and tunability, we are confident that such iNP@MOF-Beads will prove utile in future water-purification applications.

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Magnetic Nanoparticles@Metal-Organic Framework Composites as Sustainable Environment Adsorbents

Cited by 41 publications

References 54 publications

Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities

Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

MOF-Beads Containing Inorganic Nanoparticles for the Simultaneous Removal of Multiple Heavy Metals from Water

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Magnetic Nanoparticles@Metal-Organic Framework Composites as Sustainable Environment Adsorbents

Cited by 41 publications

References 54 publications

Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities

Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities

Superparamagnetic core‐shell metal–organic framework Fe3O4@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

MOF-Beads Containing Inorganic Nanoparticles for the Simultaneous Removal of Multiple Heavy Metals from Water

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Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide