Polymeric ultrafiltration membrane with in situ formed nano-silver within the inner pores for simultaneous separation and catalysis

Fang, Xiaofeng; Li, Jiansheng; Ren, Bangxing; Huang, Ying; Wang, Dapeng; Liao, Zhipeng; Li, Qin; Wang, Lianjun; Dionysiou, Dionysios D.

doi:10.1016/j.memsci.2019.02.073

Cited by 98 publications

(39 citation statements)

References 59 publications

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“…In addition to the biofouling effect, AgNPs may have a catalyst facilitating the simultaneous separation and catalysis of organic pollutants. Very good long-term stability of the membrane properties was obtained by introducing AgNPs within inner pores of the ultrafiltration membrane based on PES and PES/TA fabricated by the non-solvent-induced phase separation method [ 88 ]. AgNPs were formed by a facile in situ blending and reduction method by reduction on the natural polyphenol tannic acid (TA)–Fe complex, which was firstly blended in a PES ultrafiltration membrane.…”

Section: Membranes Containing Nanoparticles Of Silvermentioning

confidence: 99%

Nanometals-Containing Polymeric Membranes for Purification Processes

et al. 2021

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A recent trend in the field of membrane research is the incorporation of nanoparticles into polymeric membranes, which could produce synergistic effects when using different types of materials. This paper discusses the effect of the introduction of different nanometals such as silver, iron, silica, aluminum, titanium, zinc, and copper and their oxides on the permeability, selectivity, hydrophilicity, conductivity, mechanical strength, thermal stability, and antiviral and antibacterial properties of polymeric membranes. The effects of nanoparticle physicochemical properties, type, size, and concentration on a membrane’s intrinsic properties such as pore morphology, porosity, pore size, hydrophilicity/hydrophobicity, membrane surface charge, and roughness are discussed, and the performance of nanocomposite membranes in terms of flux permeation, contaminant rejection, and antifouling capability are reviewed. The wide range of nanocomposite membrane applications including desalination and removal of various contaminants in water-treatment processes are discussed.

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Section: Membranes Containing Nanoparticles Of Silvermentioning

confidence: 99%

Nanometals-Containing Polymeric Membranes for Purification Processes

et al. 2021

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Section: Flow-through Catalytic Reactors Designed By Modification Of mentioning

confidence: 99%

“…Fabrication of polyethersulfone (PES) ultrafiltration membranes containing AgNPs and bearing simultaneously the function of catalyst and separation of the product is demonstrated in Figure 11 [52]. Polyphenol tannic acid (TA) in situ blended in the PES (PES/TA) played the role of both reducing agent of silver ions and stabilizer of AgNPs.…”

Section: Flow-through Catalytic Reactors Designed By Modification Of mentioning

confidence: 99%

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Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Kudaibergenov

Джардималиева

2020

Polymers

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State-of-the-art of flow-through catalytic reactors based on metal nanoparticles immobilized within the pores of nano-, micro- and macrosized polymeric gels and in the surface or hollow of polymeric membranes is discussed in this mini-review. The unique advantages of continuous flow-through nanocatalysis over the traditional batch-type analog are high activity, selectivity, productivity, recyclability, continuous operation, and purity of reaction products etc. The methods of fabrication of polymeric carriers and immobilization technique for metal nanoparticles on the surface of porous or hollow structures are considered. Several catalytic model reactions comprising of hydrolysis, decomposition, hydrogenation, oxidation, Suzuki coupling and enzymatic reactions in the flow system are exemplified. Realization of “on-off” switching mechanism for regulation of the rate of catalytic process through controlling the mass transfers of reactants in liquid media with the help of stimuli-responsive polymers is demonstrated. Comparative analysis of the efficiency of different flow-through catalytic reactors for various reactions is also surveyed.

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“…Membrane technologies have been widely studied and applied in various separation processes over the past decade [1][2][3][4][5][6][7]. Besides the advances in separation, the incorporation of metals, non-metallic inorganic substances and enzymes into membrane systems have provided catalytic functions and allowed for applications in chemical synthesis and water treatment as well as a reduction in membrane fouling [8][9][10][11][12][13][14]. In water treatment, catalytic membranes show great potential in the remediation of contaminated water by oxidation or reduction methods [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater

Wan

Islam

Briot

et al. 2020

Journal of Membrane Science

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The poly(methacrylic acid) (PMAA) was synthesized in the pores of commercial microfiltration PVDF membranes to allow incorporation of catalytic palladium/iron (Pd/Fe) nanoparticles for groundwater remediation. Particles of 17.1 ± 4.9 nm size were observed throughout the pores of membranes using a focused ion beam. To understand the role of Pd fractions and particle compositions, 2-chlorobiphenyl was used as a model compound in solution phase studies. Results show H 2 production (Fe 0 corrosion in water) is a function of Pd coverage on the Fe. Insufficient H 2 production caused by higher coverage (> 10.4% for 5.5 wt%) hindered dechlorination rate. With 0.5 wt% Pd, palladized-Fe reaction rate (surface area normalized reaction rate, k sa = 0.12 L/(m 2-h) was considerably higher than isolated Pd and Fe particles. For groundwater, in a single pass of Pd/Fe-PMAA-PVDF membranes (0.5 wt% Pd), chlorinated organics, such as trichloroethylene (177 ppb) and carbon tetrachloride (35 ppb), were degraded to 16 and 0.3 ppb, respectively, at 2.2 seconds of residence time. The degradation rate (observed k sa) followed the order of carbon tetrachloride > trichloroethylene > tetrachloroethylene > chloroform. A 36 h continuous flow study with organic mixture and the regeneration process show the potential for on-site remediation.

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Polymeric ultrafiltration membrane with in situ formed nano-silver within the inner pores for simultaneous separation and catalysis

Cited by 98 publications

References 59 publications

Nanometals-Containing Polymeric Membranes for Purification Processes

Nanometals-Containing Polymeric Membranes for Purification Processes

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater

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