Catalytic nanofiber composite membrane by combining electrospinning precursor seeding and flowing synthesis for immobilizing ZIF-8 derived Ag nanoparticles

Mai, Zenghui; Fan, Shanhui; Wang, Yilin; Chen, Jiaojiao; Chen, Yu; Bai, Ke; Deng, Lei; Xiao, Zeyi

doi:10.1016/j.memsci.2021.120045

Cited by 33 publications

(13 citation statements)

References 46 publications

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“…HRTEM image of Ag np /LDH in Figure B clearly revealed that AgNPs with 30 nm particle size were uniformly dispersed on the surface of LDHs, and the lattice fringe spacing was 0.208 nm, corresponding to the (200) lattice plane of AgNPs (Figure S3). The distribution and configuration of Ag single-atoms on Ag s /LDH were confirmed by HAADF-STEM and STEM energy dispersive X-ray spectroscopy (EDS) mapping. As shown in Figure C, Co, Al, and Ag elements were uniformly distributed all over the LDHs structure.…”

Section: Resultsmentioning

confidence: 99%

Ag–O–Co Interface Modulation-Amplified Luminol Cathodic Electrogenerated Chemiluminescence

et al. 2022

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It remains a great challenge to develop effective strategies for improving the weak cathodic electrogenerated chemiluminescence (ECL) of the luminol-dissolved O 2 system. Interface modulation between metal and supports is an attractive strategy to improve oxygen reduction reaction (ORR) activity. Therefore, the design of electrocatalysts via interface modulation would provide new opportunities for the ECL amplification involving reactive oxygen species (ROSs). Herein, we have fabricated an Ag single-atom catalyst with an oxygen-bridged interface (Ag−O−Co) through the electrodeposition of Ag on a CoAl layered double hydroxide (LDH) modified indium tin oxide (ITO) electrode (Ag s /LDH/ITO). Interestingly, it was found that the cathodic ECL intensity of the luminol-dissolved O 2 system at the Ag s /LDH/ITO electrode was extraordinarily enhanced in comparison with those at bare ITO and other Ag nanoparticle-based electrodes. The enhanced ECL performances of the Ag s /LDH/ITO electrode were attributed to the increasing amounts of ROSs by electrocatalytic ORR in the Ag−O−Co interface. The electron redistribution of Ag and Co bimetallic sites could accelerate electron transfer, promote the adsorption of O 2 , and sufficiently activate O 2 through a four-electron reaction pathway. Finally, the luminol cathodic ECL intensity was greatly improved. Our findings can provide inspiration for revealing the interface effects between metal and supports, and open up a new avenue to improve the luminol cathodic ECL.

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Section: Resultsmentioning

confidence: 99%

Ag–O–Co Interface Modulation-Amplified Luminol Cathodic Electrogenerated Chemiluminescence

et al. 2022

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“…The result indicates the rGO–Ag membrane’s retention capacity, water flux, and stability are improved when treating toxic Cr(VI) solution. Mai et al [ 29 ] prepared a Ag–PAN catalytic nanofiber composite membrane electrospinning process where Ag nanoparticles were immobilized on the nanofibers. The water permeability of the Ag–PAN analytic nanofiber composite membrane reached the highest value at 49.64% of the amount of Ag nanoparticle immobilization.…”

Section: Introductionmentioning

confidence: 99%

Study Effect of nAg Particle Size on the Properties and Antibacterial Characteristics of Polysulfone Membranes

Prihandana

Sriani²,

Muthi’ah

et al. 2022

Nanomaterials

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Polysulfone ultrafiltration membranes were fabricated using various sizes (20, 40, and 90–210 nm) of silver nanoparticles (nAg) blended in a dope solution. To characterize the performance and properties of the prepared membranes, scanning electron microscopy (SEM), water contact angle, protein separation, water flux, and antibacterial tests were conducted. The characterization results revealed that when nAg particles (20 nm) were blended into the base polymer PSF, the PSF/nAg blended membrane had the lowest contact angle (58.5°) and surface energy (110.7 mN/m). When experimenting with ultrafiltration using protein solutions, bare PSF and PSF/nAg-20 blended membranes gave similar values of protein rejection: 93% of bovine serum albumin (BSA) and 70% of lysozyme rejection. Furthermore, SEM studies showed that the surface pore size was reduced by adding 20 nm nAg particles in the casting solution. Most importantly, the introduction of 40 nm nAg particles reduced the growth of bacterial colonies on the membrane surface by up to 72%. These findings revealed that nAg particles are expected to be a potential modifier for the fabrication of an ultrafiltration membrane.

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“…After transformation of Ag ions to Ag zero-valent by reduction reaction, the modified membranes demonstrated improved remediation and recovering of Ag(I) 68 and p-nitrophenol . 69…”

Section: Introductionmentioning

confidence: 99%

“…After transformation of Ag ions to Ag zero-valent by reduction reaction, the modified membranes demonstrated improved remediation and recovering of Ag(I) 68 and p-nitrophenol . 69 In this paper, for the first time, bare PAN fiber and metalized PAN NFs in the presence of various amounts of Ag NPs were prepared by safe protocol, as shown in Figure 1. PAN was selected as the reference polymeric matrix with poor mechanical properties, wetting and crystal orientation due to its susceptibility electro-spinnability and good tensile strength after electrospinning route.…”

Section: Introductionmentioning

confidence: 99%

“…bontoids Ag/g-C 3 N 4 , respectively, which were as stabilizer/reinforcement agents. Ma et al 68 Mai et al 69 successfully synthesized electrospun Ag-containing nanofibers from solutions of hyperbranched polyethyleneimine grafted polyacrylonitrile/graphene oxide (PAN/DMF/HPEI-GO) and polyacrylonitrile/ N ,N-Dimethylformamide/zeolite imidazolate framwork-8 (PAN/DMF/ZIF-8), respectively. After transformation of Ag ions to Ag zero-valent by reduction reaction, the modified membranes demonstrated improved remediation and recovering of Ag(I) 68 and p-nitrophenol .…”

Section: Introductionmentioning

confidence: 99%

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A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

Kara

Esmaeili

Kehtari

et al. 2022

Journal of Industrial Textiles

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Research problem The demand for polymeric materials is increasing day by day, provided that they have excellent virtues to meet desired needs. The best way to obtain high-quality polymeric materials was surface treatment in multiple methods. All the methods that have been used were expensive, multi-stage, harmful to the environment, and other shortages. Therefore, we sought in our paper to invent and develop a surface metallization protocol under green and safe conditions, based on integrating two safe methods for preparing nanomaterials (electrospinning/ultrasound) in one-pot. Aim of this work The main objective of this work is to answer a question that has been neglected in other papers: how does in-situ metallization affect the crystalline behavior of the semi-crystalline phase of the PAN matrix depending on different amounts of MA NPs and their synergy for the rest of the properties (morphological and structural) is presented, in first degree. In the second degree, an explanation of the synergy mechanism between the mechanical/hydrophilic properties and the modified structural properties of metalized fibers has explained. Results Here, an unaccustomed and green methodology to metalize the polyacrylonitrile, PAN, surface is reported with the intention of fashioning of a stable fibrous structure and the best specifications. The in-situ metallization process is essentially based on a loading of various amount of silver nanoparticles, as MA NPs “MA NPs”, (1 wt%, 4 wt%, 7 wt% and 10 wt%), which prepared by ultrasound irradiation assisted with a little amount of a reducer system (hydrazine/NaOH), on the PAN surface. The physiochemical characterization of as-synthesized fibrous samples was consisted of two parts: (i) characterization of sample nature (utilizing of XRD and UV-Vis. techniques), (ii) the chemical structure/morphological characterization (utilizing FESEM, TEM and AFM techniques) with performing all relevant measurements. From crystalline and UV-Vis. assessments, the observed shift in the diffraction peaks towards lower angles and slight shifts in the absorption bands of PAN (1 0 0) in the 1AgPAN and 4AgPAN samples, containing smaller-sized nanoparticles, are overt results of an improvement in the crystalline traits of the parent matrix. The FT-IR data revealed the intensification and overlapping of the IR-bands “C= N, C≡ N, N-H, C=O and O-H” without band shifting for fibrous samples with low content of MA NPs (1AgPAN and 4AgPAN samples). The intercalation of the MA NPs between the chains of the molecular matrix and the strong interconnection/hydrogen bonds between both components explain not only the change of the crystalline properties of the crystalline matrix but also the homogeneous distribution and creation of a stable layer of the MA NPs on the 0AgPAN surface, confirmed by the FESEM and TEM images. The results of the study of mechanical properties showed that the loading of small spherical particles onto the polymeric matric, in particular 1AgPAN and 4AgPAN samples, was positively reflected on the improvement of the mechanical performances and the related values, not in the 7AgPAN and 10AgPAN samples. Because the MA NPs have a hydrophobic character, loading them onto the bare polymeric fiber surface made the metalized fibers a stronger hydrophobic than that of hydrophilic character, which is consistent with differences in surface roughness (increasing Ra values). The main focus of this paper was to study the synergy of structural properties with each other. So, the results of the synergistic relationship study showed that the low amount of the MA NPs led to a comprehensive and positive correlation between all structural properties and in turn affected the mechanical properties-hydrophobic/hydrophilic properties. Noting that the fibers of the 1AgPAN and 4AgPAN samples had the best structural stability, compared to the fibers of the 0AgPAN, 7AgPAN and 10AgPAN samples, when they were: decreasing in Z value, increasing fiber diameter/particle size “P.S.”, increasing RCR and C.D. values and decreasing D.D, alteration in values obtained of the mechanical behavior and the increasing of contact angle “CA” values for water “H2O” droplets and decreasing for ethylene glycol “EG”. As a final result, the changes observed in the aforementioned measurements were reasonably regular and gradual for fibers with low MA NPs content, while the same measurements were significantly deteriorated in the case of fibers with higher MA NPs contents.

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Catalytic nanofiber composite membrane by combining electrospinning precursor seeding and flowing synthesis for immobilizing ZIF-8 derived Ag nanoparticles

Cited by 33 publications

References 46 publications

Ag–O–Co Interface Modulation-Amplified Luminol Cathodic Electrogenerated Chemiluminescence

Ag–O–Co Interface Modulation-Amplified Luminol Cathodic Electrogenerated Chemiluminescence

Study Effect of nAg Particle Size on the Properties and Antibacterial Characteristics of Polysulfone Membranes

A comparative investigation of the synergistic correlation (mechanical-hydrophobicity/hydrophilicity vs. structural behaviors) of a series of surface-metalized polyacrylonitrile fibers by silver nanoparticles (AgPAN): An in-situ surface metallization protocol

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