High-performance Fe-doped ZIF-8 adsorbent for capturing tetracycline from aqueous solution

Yang, Huan; Zhou, Tianjun; Zhao, Hui; Luo, Xiaofei; Liu, Yi; Deng, Chengfei; Yu, Yulan; Hu, Tianding; Shan, Shaoyun; Zhi, Yunfei; Su, Hongying; Jiang, Lihong

doi:10.1016/j.jhazmat.2021.126046

Cited by 137 publications

(30 citation statements)

References 85 publications

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“…However, this adsorbate played a pollutant role in contaminated water treatment in these works. Therefore, to enhance adsorption amount, ZIF-8 was usually modi ed by some agents such as copper, iron ion, chitosan grafting to its structure [24], [25] or supported by some orientation template like poly (diallyldimethylammonium chloride) or sodium dodecyl sulfonate to create mesoporous and macroporous. Hydro bonding and π-π attraction are the signi cant mechanisms of these adsorptions procedures [17].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Deeply understanding delivery of Tetracycline under different morphologies of ZIF-8

Luan

Lam

2022

Preprint

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Facile and biocompatible fabrication of ZIF-8 (zeolite imidazole framework) and its modifications are reported in two ways: TiO2@ZIF-8 and creating mesoporous. Adding a small amount of surfactant changes the traditional crystal morphology to mesoporous and reduces the amount of base needed compared to normal synthesis, thus minimizing environmental impact. The resulting crystals were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Infrared Spectroscopy meter (FTIR), and nitrogen adsorption measurements, which revealed the mesoporous and TiO2@ZIF-8 with polyhedral morphology. The examination of Tetracycline (TC) delivery was thoroughly studied on these hybrids ZIF-8. The loading and release of TC were controlled under the influence of factors such as morphology, and electrostatic force... by experiment data and estimating mechanism. For the first time, the number of molecules of TC adsorbed outer ZIF-8 surface area and inside its structure was investigated. This study demonstrates a green synthesis of mesoporous and TiO2@ZIF-8, maintaining an excellent yield and scalability, successfully applying for TC delivery study, and exposes the important effects of the porous structure on drug loading and release.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Deeply understanding delivery of Tetracycline under different morphologies of ZIF-8

Luan

Lam

2022

Preprint

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“…The preparation of Fe 3 O 4 @ZIF-8 was improved according to reference [ 22 ]. Weighed 3.30 g of 2-methy imidazole and 0.10 g of magnetic nanometer Fe 3 O 4 , dissolved in 70.00 mL of methanol.…”

Section: Methodsmentioning

confidence: 99%

Removal of Arsenic from Wastewater by Using Nano Fe3O4/Zinc Organic Frameworks

Huang

Liu

Wang

et al. 2022

IJERPH

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Efficient removal of arsenic in wastewater is of fundamental importance due to the increasingly severe arsenic pollution. In this study, a new composite adsorbent (Fe3O4@ZIF-8) for As(V) removal from wastewater was synthesized by encapsulating magnetic Fe3O4 nanoparticles into metal organic frameworks. In order to evaluate the feasibility of Fe3O4@ZIF-8 as an adsorbent for As(V) removal, the adsorption properties of Fe3O4@ZIF-8 were systematically explored by studying the effects of dosage, pH, adsorption isotherm, kinetics, and thermodynamics. Additionally, the characterization of Fe3O4@ZIF-8 before and after adsorption was analyzed thoroughly using various tests including SEM-EDS, XPS, BET, XRD, TG, FTIR, and the properties and arsenic removal mechanism of the Fe3O4@ZIF-8 were further studied. The results showed that the Fe3O4@ZIF-8 has a specific surface area of 316 m2/g and has excellent adsorption performance. At 25 °C, the initial concentration of arsenic was 46.916 mg/L, and pH 3 was the optimum condition for the Fe3O4@ZIF-8 to adsorb arsenic. When the dosage of the Fe3O4@ZIF-8 was 0.60 g/L, the adsorption of arsenic by the Fe3O4@ZIF-8 can reach 76 mg/g, and the removal rate can reach 97.20%. The adsorption process of arsenic to the Fe3O4@ZIF-8 can be well described by the Langmuir isotherm model and the second-order kinetic equation. At pH 3 and temperature 298 K, the maximum adsorption capacity of arsenic by the Fe3O4@ZIF-8 was 116.114 mg/g. Through the analysis of thermodynamic parameters, it is proved that the adsorption process of arsenic by the Fe3O4@ZIF-8 is a spontaneous endothermic reaction. The Fe3O4@ZIF-8 has broad prospects for removing As(V) pollution in wastewater, because of its strong adsorption capacity, good water stability, and easy preparation.

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“…These findings indicate that N elements have been successfully incorporated into the carbon matrix, in which pyridinic N as reported would act as the active component to modify the electronic structure of carbon and coordinate with the metal forming the highly active Fe-Nx moieties [20,47], while graphitic N could show a synergistic effect in helping O-O bond splitting [19]. Accordingly, the XPS peak of N 1s at bonding energy of 399.0 eV was identified to be Fe-Nx, which acts as the active sites for the ORR [48]. Furthermore, the presence of Fe in the Fe-N/C-0.05-900 can also be validated by the evidence that several Fe peaks including Fe (II) 2p3/2 (710.4 eV), Fe (III) 2p3/2 (714.3 eV), Fe (II) 2p1/2 (723.4 eV), and Fe (III) 2p1/2 (725.6 eV) can be observed in Figure 5e.…”

Section: Structural Characterization Of Fe-n/c Catalystmentioning

confidence: 99%

“…graphitic N could show a synergistic effect in helping O-O bond splitting [19]. Accordingly, the XPS peak of N 1s at bonding energy of 399.0 eV was identified to be Fe-Nx, which acts as the active sites for the ORR [48]. Furthermore, the presence of Fe in the Fe-N/C-0.05-900 can also be validated by the evidence that several Fe peaks including Fe (II) 2p 3/2 (710.4 eV), Fe (III) 2p 3/2 (714.3 eV), Fe (II) 2p 1/2 (723.4 eV), and Fe (III) 2p 1/2 (725.6 eV) can be observed in Figure 5e.…”

Section: Structural Characterization Of Fe-n/c Catalystmentioning

confidence: 99%

Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control

et al. 2021

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Searching for high-efficient, good long-term stability, and low-cost electrocatalysts toward oxygen reduction reaction (ORR) is highly desirable for the development of sustainable energy conversion devices. Iron–nitrogen doped carbon (Fe–N/C) catalysts have been recognized as the most promising candidates for traditional Pt-based catalysts that benefit from their high activity, excellent anti-poisoning ability, and inexpensiveness. Here, a super-dispersed and high-performance Fe–N/C catalyst was derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding Fe ions to imidazolate ligands within 3D frameworks. It produced a series of catalysts, whose sizes could be tuned in the range from 62 to over 473 nm in diameter. After rationally regulating the component and heating treatment, the best ORR activity was measured for the catalyst with a size of 105 nm, which was obtained when the Fe3+/Zn2+ molar ratio was 0.05 and carbonization temperature was 900 °C. It exhibited a high onset potential (Eonset = 0.99 V) and half-wave potential (E1/2 = 0.885 V) compared with a commercial 20% Pt/C catalyst (Eonset = 0.10 V, E1/2 = 0.861 V) as well as much better durability and methanol resistance in an alkaline electrolyte.

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High-performance Fe-doped ZIF-8 adsorbent for capturing tetracycline from aqueous solution

Cited by 137 publications

References 85 publications

WITHDRAWN: Deeply understanding delivery of Tetracycline under different morphologies of ZIF-8

WITHDRAWN: Deeply understanding delivery of Tetracycline under different morphologies of ZIF-8

Removal of Arsenic from Wastewater by Using Nano Fe3O4/Zinc Organic Frameworks

Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control

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