Fabrication and catalytic behavior of hierarchically-structured nylon 6 nanofiber membrane decorated with silver nanoparticles

Zhao, Huihui; Kang, Weimin; Ma, Xiaoqing; Deng, Nanping; Li, Zongjie; Cheng, Bowen

doi:10.1016/s1872-2067(16)62545-7

Cited by 11 publications

(5 citation statements)

References 42 publications

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“…The pore volume of n-HAp being close to 0.33 cm 3 g − 1 is much lower than the value reported by Xia et al for their specific productions (~1.31 cm 3 g − 1 ) but in the middle range of commercial n-HAp substrates (0.15− 0.96 cm 3 g − 1 ) [72]. The PA6 material also presents a Type II(b) sorption isotherm with little hysteresis; the specific surface area is found close to 13.2 m 2 g − 1 ; this value is consistent with the S BET of PA6 nanofiber membranes (close to 15.8 m 2 g − 1 ) [74]. The pore volume and the average pore size are close to 0.086 cm 3 g − 1 and 2.2 nm, respectively; the material can be considered microporous; hindering the diffusion of metal ions into the sorbent.…”

Section: Textural Properties -Bet Analysissupporting

confidence: 79%

Synthesis of polyamide 6/nano-hydroxyapatite hybrid (PA6/n-HAp) for the sorption of rare earth elements and uranium

Hassanein

Masoud

Mohamed

et al. 2021

Journal of Environmental Chemical Engineering

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Polyamide (PA6) and hydroxyapatite (n-HAp) have intrinsic sorption properties for metal ions. Their association by melt compounding allows manufacturing a composite material (PA6/n-HAp) efficient for the binding of uranyl and rare earth metal ions (REEs) in acidic solution (in the pH range 2-2.5). The composite shows enhanced sorption capacities (5-7 times) compared with single PA6 material. The structuration of the material slightly improves textural properties but contributes to improve the accessibility and availability of reactive groups (including by size distribution). Metal sorption proceeds mainly through complexation of amide reactive groups as shown by FTIR characterization (modification of the environment of C --O and NH groups) rather than ionexchange/electrostatic attraction. Maximum sorption capacities approach 0.34 mmol U g − 1 , 0.49 mmol Er g − 1 and 0.70 mmol Nd g − 1 : the preference may be correlated to the covalent rather than ionic character of these metal ions. Uptake kinetics are relatively slow (requiring up to 6− 8 h, under selected experimental conditions): the textural properties of the composite (pore size: 2.6 nm) limit the mass transfer properties (though slightly enhanced compared with PA6 precursor). The resistance to intraparticle diffusion constitutes the major con-trolling step for uptake kinetics. Nitric acid is the most efficient eluent for the desorption of loaded metals (ef-ficiency exceeds 94 %); noticeably U(VI) elution is optimal at 1 M HNO 3 concentration, contrary to REEs that require lower concentration (i.e., 0.1 M). Preliminary tests on sulfuric acid leachates of Egyptian ores demon-strate that the sorbent maintains good sorption properties for REEs and U despite the complexity of the solution. The sorbent has a marked preference for REEs, U and Th against base and alkali metals.

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Section: Textural Properties -Bet Analysissupporting

confidence: 79%

Synthesis of polyamide 6/nano-hydroxyapatite hybrid (PA6/n-HAp) for the sorption of rare earth elements and uranium

Hassanein

Masoud

Mohamed

et al. 2021

Journal of Environmental Chemical Engineering

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“…Kang’s team discovered a simple method for mass-producing multilayered nanofibers by adding organic branched salts into spinning solutions using an electrospinning techinique . The approach is applicable to a range of polymers, including but not limited to PVDF, nylon-6 (PA6), polyurethane (PU) elastomers, cellulose acetate (CA), poly m-phenyleneisophthalamide (PMIA), and others. − Simultaneously, as illustrated in Figure c, based on the inspiration from a special root-like structure, Gao et al designed and prepared a multilayered T-PVDF nanofiber membrane using an electrospinning method. The prepared membrane was then combined with a poly(ethylene oxide) (PEO)/lithium salt to fabricate a root-like CSE for their applications in all-solid-state lithium batteries.…”

Section: Plant-inspired Structured Materialsmentioning

confidence: 99%

Review: Application of Bionic-Structured Materials in Solid-State Electrolytes for High-Performance Lithium Metal Batteries

Feng,

Deng,

et al. 2024

ACS Nano

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Solid-state lithium metal batteries (SSLMBs) have gained significant attention in energy storage research due to their high energy density and significantly improved safety. But there are still certain problems with lithium dendrite growth, interface stability, and room-temperature practicality. Nature continually inspires human development and intricate design strategies to achieve optimal structural applications. Innovative solid-state electrolytes (SSEs), inspired by diverse natural species, have demonstrated exceptional physical, chemical, and mechanical properties. This review provides an overview of typical bionic-structured materials in SSEs, particularly those mimicking plant and animal structures, with a focus on their latest advancements in applications of solid-state lithium metal batteries. Commencing from plant structures encompassing roots, trunks, leaves, flowers, fruits, and cellular levels, the detailed influence of biomimetic strategies on SSE design and electrochemical performance are presented in this review. Subsequently, the recent progress of animal-inspired nanostructures in SSEs is summarized, including layered structures, surface morphologies, and interface compatibility in both two-dimensional (2D) and three-dimensional (3D) aspects. Finally, we also evaluate the current challenges and provide a concise outlook on future research directions. We anticipate that the review will provide useful information for future reference regarding the design of bionic-structured materials in SSEs.

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“…8 Wastewater treatment, especially textile effluent including colors and their breakdown products, has grown due to rapid economic and technological progress. 9 All of these techniques are costly with several limitations. Various green technologies are available, but photocatalysis is considered one of the most resourceful.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Several methods with advanced technologies are used, such as chemical oxidation, adsorptions, , photocatalysis, and membrane separation, for wastewater treatment . Wastewater treatment, especially textile effluent including colors and their breakdown products, has grown due to rapid economic and technological progress . All of these techniques are costly with several limitations.…”

Section: Introductionmentioning

confidence: 99%

“…All of these techniques are costly with several limitations. Various green technologies are available, but photocatalysis is considered one of the most resourceful. , Recently, nanostructured photocatalysis has gained popularity as a cost-efficient, easy, and effective method for cleaning the environment, particularly for decomposing harmful organic pollutants in water . A combination of synergistic effects and plasmonic , activity results in higher photocatalytic activity in hybrid nanomaterials than in pristine ones.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Photocatalytic Activity of Electrospun and Surface-Modified PAN/α-FeOOH Nanofibers for the Degradation of Hazardous Azo Dyes

Sudapalli,

Shimpi

2023

Langmuir

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Decoration of α-FeOOH nanorods over PAN nanofibers was performed using the electrospinning technique. The as-designed decorated nanofibers were characterized using various techniques such as wide-angle powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FTIR) spectroscopy, UV−vis spectrophotometry (UV−vis), thermogravimetry analysis (TGA), N 2 adsorption−desorption isotherm (BET), and X-ray photoelectron spectrometry (XPS). α-FeOOH NRs were decorated uniformly over PAN fibers, as observed from its morphological investigation, which shows novelty. 1D α-FeOOH nanorods with PAN nanofibers have not been studied for photocatalytic characteristics. No literature mentions that α-FeOOH nanorods coated in PAN NFs act as photocatalysts to degrade hazardous azo dyes. α-FeOOH nanorods on PAN NFs inhibit aggregation and increase dye binding, boosting photocatalytic performance. PAN/α-FeOOH NFs have a maximal specific surface area with a reduced bandgap than α-FeOOH NRs. PAN/α-FeOOH nanofibers showed excellent photocatalytic activity for the degradation of Trypan blue (TB) (120 min, 99.7%) and Eriochrome black T (EBT) dyes (160 min, 97.6%), respectively, under solar light irradiation. PAN/α-FeOOH NFs have the potential to be used in the degradation of azo dyes and the treatment of wastewater due to their low energy requirements and versatility.

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Fabrication and catalytic behavior of hierarchically-structured nylon 6 nanofiber membrane decorated with silver nanoparticles

Cited by 11 publications

References 42 publications

Synthesis of polyamide 6/nano-hydroxyapatite hybrid (PA6/n-HAp) for the sorption of rare earth elements and uranium

Synthesis of polyamide 6/nano-hydroxyapatite hybrid (PA6/n-HAp) for the sorption of rare earth elements and uranium

Review: Application of Bionic-Structured Materials in Solid-State Electrolytes for High-Performance Lithium Metal Batteries

Investigation of the Photocatalytic Activity of Electrospun and Surface-Modified PAN/α-FeOOH Nanofibers for the Degradation of Hazardous Azo Dyes

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