Environmentally friendly ultrasound-assisted synthesis of magnetic zeolitic imidazolate framework - Graphene oxide nanocomposites and pollutant removal from water

Mahmoodi, Niyaz Mohammad; Oveisi, Mina; Bakhtiari, Mohammad; Hayati, Bagher; Shekarchi, Ali Akbar; Bagheri, Amin; Rahimi, Shaban

doi:10.1016/j.molliq.2019.02.139

Cited by 161 publications

(53 citation statements)

References 57 publications

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“…To validate the coordination of silver and imidazole-based ligands, as well as the chemical structures of Ag-MAFs, FTIR analysis was performed and the results are presented in Figure a. Signals appearing in the IR spectrum of the Ag-2Imid structure were consistent with those previously reported for 2-methylimidazole compounds. , The peaks observed at 3135 and 2924 cm –1 can be associated with the aliphatic and aromatic asymmetric C–H stretching, respectively. − The band observed at around 1580 cm –1 corresponds to the CN stretching vibration in imidazole structure . The bands at around 1144, 992, 760, and 1610 cm –1 are attributed to the C–N stretching, C–N bending, C–H bending, and CC stretching vibrations, respectively. , Moreover, the peaks around 1300–1465 cm –1 correspond to the entire ring stretch of the imidazole group. , …”

Section: Resultssupporting

confidence: 71%

Tailoring the Biocidal Activity of Novel Silver-Based Metal Azolate Frameworks

Seyedpour

Shamsabadi

Salestan

et al. 2020

ACS Sustainable Chem. Eng.

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The synthesis of nanostructures with tunable antibacterial properties using green solvents at room temperature is of environmental interest, and antibacterial nanomaterials are used in the fabrication of biofouling-resistant membranes for water purification and wastewater treatment. In this study, we investigate the effect of organic ligands on the antibacterial and structural properties of silver-based metal−azolate frameworks (Ag-MAFs). Three new Ag-MAFs were synthesized with silver, as the metal center, and imidazole-based linkers having different chemistries via a facile and environmentally friendly method conducted at room temperature. The coordination of silver ions with the linkers resulted in the formation of Ag-imidazole, Ag-2 methylimidazole, and Ag-benzimidazole complexes with octahedral, hexagonal nanosheet, and nanoribbon morphologies, respectively. The Ag-MAFs exhibited excellent antibacterial activity (up to 95% die-off of bacteria at a short exposure time of 3 h) in colloidal forms against both Gram-negative Escherichia coli (E. coli) and Gram-positive Bacillus subtilis (B. subtilis) because of synergetic effects of silver and the imidazole-based linkers. Ag-2 methylimidazole showed the highest antibacterial activity, owing to its high silver concentration and special nanocrystal structure that provides better contact with bacteria. This work indicates that the antibacterial activity of Ag-MAF nanostructures can be tailored by changing the organic linker, allowing for creating nanostructures with desired biocidal properties.

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Section: Resultssupporting

confidence: 71%

Tailoring the Biocidal Activity of Novel Silver-Based Metal Azolate Frameworks

Seyedpour

Shamsabadi

Salestan

et al. 2020

ACS Sustainable Chem. Eng.

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“…Metal–organic frameworks (MOFs) are porous substances composed of metal ions/clusters (joint) and organic ligands (linker) [21]. The metal ions/clusters attune with multi-dimensional organic ligands to compose secondary building units [22,23]. This kind of performance in metal ions and links produces MOFs with much more surface area than other porous materials such as zeolite and activated carbon [24].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, MOF composites have attracted considerable attraction in various fields such as the adsorption process [22,28]. This field is partly new, and their composites were considered with different materials.…”

Section: Introductionmentioning

confidence: 99%

“…This field is partly new, and their composites were considered with different materials. To enhance the features of MOF, various types of materials such as activated carbon, Graphene oxide (GO), zero-valent iron nanoparticles (nZVI) [29], biological materials, nanofibrous membranes, etc., to increase the specific surface, higher stability, better growth of MOFs nanocrystals, and more efficient in absorbing pollutants from aquatic environments have been studied [22,30]. Activated carbon is an attractive and inexpensive option to remove organic and inorganic pollutants from water due to its high surface area, porous structure, and its thermal stability [31,32], but reactivation costs of activated carbon is high [33].…”

Section: Introductionmentioning

confidence: 99%

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In Situ Synthesis of MIL-100(Fe) at the Surface of Fe3O4@AC as Highly Efficient Dye Adsorbing Nanocomposite

Hamedi

Trotta

Zarandi

et al. 2019

IJMS

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A new magnetic nanocomposite called MIL-100(Fe) @Fe3O4@AC was synthesized by the hydrothermal method as a stable adsorbent for the removal of Rhodamine B (RhB) dye from aqueous medium. In this work, in order to increase the carbon uptake capacity, magnetic carbon was first synthesized and then the Fe3O4 was used as the iron (III) supplier to synthesize MIL-100(Fe). The size of these nanocomposite is about 30–50 nm. Compared with activated charcoal (AC) and magnetic activated charcoal (Fe3O4@AC) nanoparticles, the surface area of MIL-100(Fe) @Fe3O4@AC were eminently increased while the magnetic property of this adsorbent was decreased. The surface area of AC, Fe3O4@AC, and MIL-100(Fe) @Fe3O4@AC was 121, 351, and 620 m2/g, respectively. The magnetic and thermal property, chemical structure, and morphology of the MIL-100(Fe) @Fe3O4@AC were considered by vibrating sample magnetometer (VSM), thermogravimetric analysis (TGA), zeta potential, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Brunner-Emmet-Teller (BET), and transmission electron microscopy (TEM) analyses. The relatively high adsorption capacity was obtained at about 769.23 mg/g compared to other adsorbents to eliminate RhB dye from the aqueous solution within 40 min. Studies of adsorption kinetics and isotherms showed that RhB adsorption conformed the Langmuir isotherm model and the pseudo second-order kinetic model. Thermodynamic amounts depicted that the RhB adsorption was spontaneous and exothermic process. In addition, the obtained nanocomposite exhibited good reusability after several cycles. All experimental results showed that MIL-100(Fe) @Fe3O4@AC could be a prospective sorbent for the treatment of dye wastewater.

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“…In recent years, the industrialization and population growth of the world, due to the limited resources of fresh water, drinking water, as well as climate change due to global warming, has doubled the pressure on existing resources [1]. Many organic pollutants in water sources existing a wide range of compounds, including dyes, insecticides, petroleum products, paper, leather, plastics and rubber, detergents, oils, pharmaceutical and personal care products compounds [2].…”

Section: Introductionmentioning

confidence: 99%

Carboxyl Methyl Cellulose@Guar Gum@ CuO Nanoparticle as Effective Adsorbent for the Removal of Dye From Aqueous Solution

Naeini¹,

Kalaee²,

Moradi³

et al. 2021

Preprint

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In the present study, the study and fabrication of inorganic organic nanocomposites with Guar gam and Carboxy methyl cellulose biopolymer substrates. The synthesis nanocomposite of CMC/GG/CuO-3 is biodegradable and biocompatible, and also has a significant efficiency in removing malachite green (MG) dye from aqueous solution. Properties were evaluated by XRD, FTIR, SEM, EDX and BET analysis. Important and influential parameters on the adsorption process such as adsorbent amount, initial dye concentration, pH and contact time on the removal efficiency of contaminants from aqueous solutions were investigated. Maximum removal efficiency and adsorption capacity were 92.4% and 18.6 mg/g, respectively. In order to analyze the mechanism of experimental data, two First-order and Second-order kinetic models were used, which followed the second-order kinetics with R2=1. Also, the study of Freundlich and Langmuir isotherms showed that the isotherm model of Freundlich follows the R2=0.94, which indicates the non-uniformity of adsorption on the adsorbent surface.

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Environmentally friendly ultrasound-assisted synthesis of magnetic zeolitic imidazolate framework - Graphene oxide nanocomposites and pollutant removal from water

Cited by 161 publications

References 57 publications

Tailoring the Biocidal Activity of Novel Silver-Based Metal Azolate Frameworks

Tailoring the Biocidal Activity of Novel Silver-Based Metal Azolate Frameworks

In Situ Synthesis of MIL-100(Fe) at the Surface of Fe3O4@AC as Highly Efficient Dye Adsorbing Nanocomposite

Carboxyl Methyl Cellulose@Guar Gum@ CuO Nanoparticle as Effective Adsorbent for the Removal of Dye From Aqueous Solution

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