Preparation of polydopamine-modified zeolitic imidazolate framework-8 functionalized electrospun fibers for efficient removal of tetracycline

Shen, Chao; Li, Xiang; Li, Yanzi; Wang, Yuannan; Wang, Ce

doi:10.1016/j.jcis.2019.05.078

Cited by 74 publications

(26 citation statements)

References 56 publications

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“…At this point, the dominant species of TC is a neutral molecule (TC 0 ), and only a small amount of TC + can be adsorbed by lots of basic sites including −OH groups and N-moieties. 49 As the pH pzc value of PAM/CA@Cu was around 4.5, at the test condition of pH = 5.0 (pH > pH pzc ), the negatively charged adsorbent would promote the adsorption of TC + through electrostatic interaction. Besides, at around pH 5.0, TC molecules became neutral, which exhibited higher hydrophobic nature between zwitterionic species.…”

Section: Resultsmentioning

confidence: 97%

Efficient Adsorption of Tetracycline from Aqueous Solutions by Modified Alginate Beads after the Removal of Cu(II) Ions

et al. 2021

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This work dealt with a potential and effective method to reuse modified alginate beads after the removal of Cu(II) ions for efficient adsorption of tetracycline (TC) from aqueous solutions. The modified alginate beads were fabricated by a polyacrylamide (PAM) network interpenetrated in alginate–Ca2+ network (PAM/CA) decorated with polyethylene glycol as a pore-forming agent. The porous PAM/CA was characterized using scanning electron microscopy, Brunauer–Emmett–Teller, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy analysis. The adsorption kinetics, isotherms, adsorption stability, and reusability studies of the adsorbent toward Cu(II) ions were scrutinized. The column performance of porous PAM/CA was tested with Cu(II)-containing electroplating wastewater. After Cu(II) adsorption, the Cu(II)-adsorbed PAM/CA (PAM/CA@Cu) was applied to remove TC from aqueous solutions without any regeneration process. The effects of pH, initial TC concentration, ionic strength, and coexisting ions on the adsorption were also discussed in detail. Compared with many reported adsorbents, the PAM/CA@Cu exhibited an excellent adsorption performance toward TC with a maximum adsorption capacity of 356.57 mg/g predicted by the Langmuir model at pH 5.0 and 30 °C with the absence of coexisting ions. The possible adsorption mechanism of TC onto the PAM/CA@Cu was revealed.

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Section: Resultsmentioning

confidence: 97%

Efficient Adsorption of Tetracycline from Aqueous Solutions by Modified Alginate Beads after the Removal of Cu(II) Ions

et al. 2021

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“…Besides, π-π interaction between the aromatic rings in MIL-125(Ti)/MIL-53(Fe)/CNT@Alg (π- electron donor) and TC molecules (π- electron acceptor) 7 , 43 . In addition, Coordination bonds between the unsaturated metals (i.e., Ti and Fe) and TC as well as hydrophobic interaction especially the presence of CNT increases the hydrophobicity of the microbeads 77 , 78 . Although, many studies suggested H-bonding as one of the controlling mechanisms on the TC adsorption, it is difficult to be the main adsorption interaction.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of easy separable and reusable MIL-125(Ti)/MIL-53(Fe) binary MOF/CNT/Alginate composite microbeads for tetracycline removal from water bodies

Omer

El-Monaem

El‐Subruiti

et al. 2021

Sci Rep

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In this investigation, we aimed to fabricate easy separable composite microbeads for efficient adsorption of tetracycline (TC) drug. MIL-125(Ti)/MIL-53(Fe) binary metal organic framework (MOF) was synthetized and incorporated with carbon nanotube (CNT) into alginate (Alg) microbeads to form MIL-125(Ti)/MIL-53(Fe)/CNT@Alg composite microbeads. Various tools including FTIR, XRD, SEM, BET, Zeta potential and XPS were applied to characterize the composite microbeads. It was found that the specific surface area of MIL-125(Ti)/MIL-53(Fe)/CNT@Alg microbeads was 273.77 m2/g. The results revealed that the adsorption of TC augmented with rising CNT proportion up to 15 wt% in the microbeads matrix. In addition, the adsorption process followed the pseudo-second-order and well-fitted to Freundlich and Langmuir models with a maximum adsorption capacity of 294.12 mg/g at 25 ◦C and pH 6. Furthermore, thermodynamic study clarified that the TC adsorption process was endothermic, random and spontaneous. Besides, reusability test signified that MIL-125(Ti)/MIL-53(Fe)/CNT@Alg composite microbeads retained superb adsorption properties for six consecutive cycles, emphasizing its potentiality for removing of pharmaceutical residues.

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“…Normally, there are two ways to prepare MOF/polymer electrospun fibers, which are “blending electrospinning” and “surface coating”. , The preparation of MOF/polymer blending electrospun fibers from blending electrospinning involves a three-step procedure: MOF powder synthesis, preparation of a MOF/polymer blending solution, and direct electrospinning of the blending solution . The preparation of MOF-coated electrospun polymer fibers from surface coating involves a two-step procedure: preparation of polymer-based electrospun fibers and the in situ coating of MOFs on the surface of the fibers . The advantage of MOF/polymer blending electrospun fibers is that MOFs can be loaded in the fibers steadily.…”

Section: Introductionmentioning

confidence: 99%

“…28 The preparation of MOF-coated electrospun polymer fibers from surface coating involves a two-step procedure: preparation of polymer-based electrospun fibers and the in situ coating of MOFs on the surface of the fibers. 29 The advantage of MOF/ polymer blending electrospun fibers is that MOFs can be loaded in the fibers steadily. However, they have the same situation as the composite beads in that most of the MOFs are inside the fibers, which impedes the contact between MOFs and the pollutants.…”

Section: Introductionmentioning

confidence: 99%

Constructing Mesoporous Adsorption Channels and MOF–Polymer Interfaces in Electrospun Composite Fibers for Effective Removal of Emerging Organic Contaminants

Zhao

Shi

et al. 2020

ACS Appl. Mater. Interfaces

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Recently, metal–organic framework (MOF)-based electrospun fibers have attracted considerable attention as adsorbents for organic contaminant removal from water. To prepare these fibers, two common strategies including blending electrospinning and surface coating are employed. However, fibers obtained from the two strategies still have some disadvantages, such as adsorption site blockage and unstable loading. Here, we constructed interconnected mesopores in the electrospun zeolitic imidazolate framework-8 (ZIF-8)/polyacrylonitrile (PAN) fibers with the assistance of poly(vinylpyrrolidone) to expose more adsorption sites of ZIF-8 and make ZIF-8 more stable. Moreover, the mesopores could also enhance the diffusion of contaminant molecules and create MOF–polymer interfaces in the fiber, which improve the adsorption rate and adsorption capacity, respectively. The obtained fibers were used to adsorb antibiotic tetracycline from water. Benefiting from the mesoporous adsorption channels and the MOF–polymer interface, porous ZIF-8/PAN fibers showed faster adsorption kinetics than ZIF-8/PAN blending fibers and larger adsorption capacity than ZIF-8-coated PAN fibers and ZIF-8/PAN blending fibers. The maximum adsorption capacity of porous ZIF-8/PAN fibers was 885.24 mg/g, which is close to that of pure ZIF-8. After 10 adsorption–desorption cycles, the removal efficiency was still above 97%. In addition, porous ZIF-8/PAN fibers could act as the membrane adsorbents to dynamically separate tetracycline with a treated capacity of 9.93 × 103 bed volumes. These results demonstrate that our prepared porous ZIF-8/PAN fibers have great potential in antibiotic drug removal.

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Preparation of polydopamine-modified zeolitic imidazolate framework-8 functionalized electrospun fibers for efficient removal of tetracycline

Cited by 74 publications

References 56 publications

Efficient Adsorption of Tetracycline from Aqueous Solutions by Modified Alginate Beads after the Removal of Cu(II) Ions

Efficient Adsorption of Tetracycline from Aqueous Solutions by Modified Alginate Beads after the Removal of Cu(II) Ions

Fabrication of easy separable and reusable MIL-125(Ti)/MIL-53(Fe) binary MOF/CNT/Alginate composite microbeads for tetracycline removal from water bodies

Constructing Mesoporous Adsorption Channels and MOF–Polymer Interfaces in Electrospun Composite Fibers for Effective Removal of Emerging Organic Contaminants

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