Design and development of amine functionalized iron based metal organic frameworks for selective fluoride removal from water environment

Jeyaseelan, Antonysamy; Naushad, Mu.; Ahamad, Tansir; Viswanathan, Natrayasamy

doi:10.1016/j.jece.2020.104563

Cited by 77 publications

(18 citation statements)

References 55 publications

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“…As shown in Figure c, a weak wide band at 3596 cm –1 and a wide band in the region from 3000 to 3515 cm –1 correspond to the coordinated −OH and H 2 O, respectively . The two strong separated bands of 1568 and 1377 cm –1 demonstrate that −COO– is bidentate coordinated with Ni/Fe ions. − The extensional vibration band (1500 cm –1 ) of the para-aromatic C–H group and bending vibration band (810 and 747 cm –1 ) of the aromatic ring demonstrate the existence of the benzene ring. , In the enlarged view (Figure d), O–Ni–O corresponds to the peaks at 439, 524, and 676 cm –1, and the weak peak at 540 cm –1 in the Fe–MOF is attributed to Fe–O . Percentage of atomic content for different elements is shown in Table S1, and the actual atomic ratio of Ni to Fe is close to the target ratio.…”

Section: Resultsmentioning

confidence: 88%

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Zhang

et al. 2021

ACS Sens.

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Portable and sensitive mixed-potential type solid-state electrolyte (MPSE) gas sensors can detect exhaled biomarkers in a noninvasive and inexpensive way, which is significant for convenient disease diagnosis and saving medical resources. However, high working temperature is still one of the main bottlenecks for hindering MPSE gas sensors’ applications in disease diagnosis. Here, we, for the first time, developed and fabricated new room-temperature MPSE gas sensors utilizing K2Fe4O7 electrolyte and Ni/Fe–MOF (Ni/Fe clusters are coordinated with 1,4-H2BDC) sensing electrodes (SEs) for the detection of ppb-level NO. Among different MOF SEs, the sensor attached with the Ni–MOF SE presents the highest NO sensitivities. This is attributed to a reducing oxygen reduction reaction activity and enhancing NO electrochemical catalytic reaction activity, verified by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests. In addition, the presented sensor also shows a low detection limit (20 ppb), fast response/recovery characteristic (17 s/6 s to 50 ppb NO), excellent selectivity, acceptable repeatability, and long-term stability of 34 days to NO at 25 °C and 60%RH. Simultaneously, the mechanism of humidity effect on the sensing performance was investigated by EIS and CV tests. Our work provides new insight into the development of room-temperature solid-state electrolyte gas sensors based on the mixed-potential mechanism and enlarges the potential application domain.

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Section: Resultsmentioning

confidence: 88%

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Zhang

et al. 2021

ACS Sens.

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“…Metal-organic frameworks (MOFs) are crystalline porous materials including metal ions and organic ligands. MOF materials have tunable surface chemistries and pore sizes, as well as large specific surface areas [18][19][20], allowing their application for enzyme immobilization. For example, laccase immobilization was achieved using micro-and mesoporous Zr-MOF, achieving an improvement of the enzyme's reusability and stability [21].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

et al. 2021

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The laccase enzyme was successfully immobilized over a magnetic amino-functionalized metal–organic framework Fe3O4-NH2@MIL-101(Cr). Different techniques were used for the characterization of the synthesized materials. The Fe3O4-NH2@MIL-101(Cr) laccase showed excellent resistance to high temperatures and low pH levels with a high immobilization capacity and large activity recovery, due to the combination of covalent binding and adsorption advantages. The long-term storage of immobilized laccase for 28 days indicated a retention of 88% of its initial activity, due to the high stability of the immobilized system. Furthermore, a residual activity of 49% was observed at 85 °C. The immobilized laccase was effectively used for the biodegradation of Reactive Black 5 (RB) and Alizarin Red S (AR) dyes in water. The factors affecting the RB and AR degradation using the immobilized laccase (dye concentration, temperature and pH) were investigated to determine the optimum treatment conditions. The optimum conditions for dye removal were a 5 mg/L dye concentration, temperature of 25 °C, and a pH of 4. At the optimum conditions, the biodegradation and sorption-synergistic mechanism of the Fe3O4-NH2@MIL-101(Cr) laccase system caused the total removal of AR and 81% of the RB. Interestingly, the reusability study of this immobilized enzyme up to five cycles indicated the ability to reuse it several times for water treatment.

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“…The continuing increased industrial wastewater resulting from the rapid development of science and technology causes severe pollution on the global water environment. [1][2][3][4] The nonbiodegradable heavy metal ions are one of the main pollutants in industrial effluents, which are harmful to human health due to the gradual accumulation in the ecological environment. [5,6] Pb(II) and Ag(I) are the most toxic contaminants among the various heavy ions widely involved in industries.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Millimeter‐Sized Sodium Alginate‐Silica Composite Spheres for Highly Selective Adsorption of Heavy Metal Ions

et al. 2022

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Millimeter‐sized (∼3.5 mm) sodium alginate‐silica composite spheres with macroporous structure and functional groups of amino‐ (NH2‐SiO2/SA) and sulfhydryl (SH‐SiO2/SA), respectively, were successfully prepared by a simple hydrothermal copolycondensation. The obtained materials were characterized by FT‐IR, SEM, XPS, N2 adsorption‐desorption techniques, and their heavy metal ion adsorption performance was evaluated in detail under different conditions. Characterization results revealed that the functional group plays a key role in the selectivity of metal ions, that is, NH2‐SiO2/SA preferentially adsorbs the relatively hard Pb(II) ions while SH‐SiO2/SA favors the softer Ag(I) ion, which is attributed to the fact that S atoms are softer donor than N atoms. The adsorption kinetics and the adsorption equilibrium fitted well with the pseudo‐second‐order model and Langmuir adsorption isotherms, respectively. The adsorption experiments showed the maximum adsorption capacities of Pb(II) for NH2‐SiO2/SA and Ag(I) for SH‐SiO2/SA are 460 mg/g and 417 mg/g, respectively, giving good stability without a significant decrease in 5 recycles. Therefore, the synthesized materials display promising adsorbents for recycling heavy metal pollutants from wastewater due to their good selectivity, high adsorption capacity, stability and easy recovery due to their large size.

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Design and development of amine functionalized iron based metal organic frameworks for selective fluoride removal from water environment

Cited by 77 publications

References 55 publications

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

Facile Preparation of Millimeter‐Sized Sodium Alginate‐Silica Composite Spheres for Highly Selective Adsorption of Heavy Metal Ions

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Design and development of amine functionalized iron based metal organic frameworks for selective fluoride removal from water environment

Cited by 77 publications

References 55 publications

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K2Fe4O7 Electrolyte and Ni/Fe–MOF Sensing Electrodes

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K2Fe4O7 Electrolyte and Ni/Fe–MOF Sensing Electrodes

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

Facile Preparation of Millimeter‐Sized Sodium Alginate‐Silica Composite Spheres for Highly Selective Adsorption of Heavy Metal Ions

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Product

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About

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes