Improved conductivity and anti(bio)fouling of cation exchange membranes by AgNPs-GO nanocomposites

López-Cázares, María Irene; Pérez-Rodríguez, Fátima; Rangel-Méndez, J. Rene; Centeno-Sánchez, Marisol; Cházaro-Ruiz, Luis F.

doi:10.1016/j.memsci.2018.08.036

Cited by 18 publications

(7 citation statements)

References 59 publications

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“…The plane located observed at 20° was ascribed to the polymer structure. The diffractograms associated to AgNPs exhibited peaks at 38, 45, 65, and 78°, which were associated with the crystalline planes 111, 200, 220, and 311, respectively . Besides, strong silver signals of the nanoparticles were detected from XPS (Figure d).…”

Section: Resultssupporting

confidence: 76%

“…This was because the proper connection structure brought by AgNPs increased the speed of ion transport. 43,54,55 After 2 h of experimentation, the salt removal ratios of 60SPSF-C3#-Ag-1, -2, and -3 were 65.1, 67.5, and 68.1%, respectively, all of which were higher than that of 60SPSF without any modification (Figure 9c). In the case of 60SPSF-C3#, despite the ameliorative three-dimensional structure, the increase of the charge density improved the desalination performance to some degree.…”

Section: Resultsmentioning

confidence: 96%

“…The diffractograms associated to AgNPs exhibited peaks at 38, 45, 65, and 78°, which were associated with the crystalline planes 111, 200, 220, and 311, respectively. 43 Besides, strong silver signals of the nanoparticles were detected from XPS (Figure 1d). As expected, the binding energy peaks at 368 eV (Ag 3d 5/2 orbital) and 374 eV (Ag 3d 3/2 orbital) were obviously observed in the high-resolution XPS spectrum of Ag peaks, further affirming the successful formation of AgNPs.…”

Section: Resultsmentioning

confidence: 99%

“…The 60SPSF-C3#-Ag-2 and 60SPSF-C3#-Ag-3 samples exhibited uniform NP distribution characterized by a good dispersion without aggregation and with a narrow size distribution. 20,29−31,43 The presence AgNPs dispersed not only onto the surface but also inside of the membrane, determining the surface hydrophilicity and induced microphase structure of hydrophilic/hydrophobic separation in CEMs, which was crucial for the ion-transport behavior in the performance of IEMs. 43,44 The optimized sample with excellent dispersion and decoration was 60SPSF-C3#-Ag-2.…”

Section: Resultsmentioning

confidence: 99%

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Three-Dimensional Stable Cation-Exchange Membrane with Enhanced Mechanical, Electrochemical, and Antibacterial Performance by in Situ Synthesis of Silver Nanoparticles

et al. 2019

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In this study, a simple and facile approach was proposed to synthesize silver nanoparticles (AgNPs) loaded cation-exchange membranes (CEMs). A wide analytical study involving scanning electronic microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy was accomplished to corroborate that the in situ generated AgNPs were uniformly dispersed in the polymer matrix. In addition, as a result of the proposed synthesis strategy, the cross-linking structure inside the membrane was formed. The proper particle size and dispersibility of the AgNPs improved the mechanical properties of the membranes. Besides, the optimal AgNP-loaded CEM exhibited excellent bacterial killing activities against Gram-negative bacteria and showed a controlled improvement in the electrochemical performance of the prepared membranes. These effects were caused by the obtained distribution of AgNPs near ion-exchange groups that increased the aggregation of water molecules around them, improving the efficiency of ion transport due the formation of array broad ion-transport channels. The optimized CEM [sulfonated polysulfone (60SPSF)-C3#-Ag-2] exhibited an enhanced NaCl removal ratio of 67.5% with a high current efficiency (96.9%) and a low energy consumption (5.84 kWh kg–1). The distance of the inhibition zone from the boundary of the membrane of SPSF-C3#-Ag-2 reached 4.8 mm. These results led us to suggest that the proposed synthesis strategy may have potential applications in the field of antibacterial and desalting ion-exchange membranes.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Three-Dimensional Stable Cation-Exchange Membrane with Enhanced Mechanical, Electrochemical, and Antibacterial Performance by in Situ Synthesis of Silver Nanoparticles

et al. 2019

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“…Since biofouling could be part of organic fouling, antibiofouling properties were also studied by modifying several types of IEMs with different kinds of immobilized nanoparticules such as modification of Nafion and Ultrex membranes with silver nanoparticles (AgNPs) immobilized on graphene oxide (GO) as a thin film, using a polydopamine adhesive [109].…”

Section: Surface Modification Of Iemmentioning

confidence: 99%

A Review on Ion-exchange Membranes Fouling and Antifouling During Electrodialysis Used in Food Industry: Cleanings and Strategies of Prevention

2020

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During the last decades, the interest of using ion-exchange membranes (IEMs) in electrodialysis (ED) technologies has emerged in wastewater treatment, drinking water and process water production as well as food industry and more recently in processes of energy conversion and storage. Like in all membrane technologies, the problem of fouling is one of the limitative phenomena of IEM efficiency and lifetime. It mainly leads to an increase in electrical resistance of ED stacks and consequently to increase operating and membrane replacement costs, which directly affects the cost of the final product. In food industry, the composition of the treated solutions and beverages is most often complex and rich in several organic and inorganic compounds which further increases the risks and effects of fouling. Hence, a better knowledge and understanding of IEM fouling phenomena is not only the key to solve the problems and find adequate solutions, but also is one of the main factors driving membrane technology forward. This review is mainly focused on the organic fouling phenomena of IEMs during ED processes in both food and water treatment industries. It principally presents the main cleaning techniques used in industry or experimented at laboratory scale and the recent strategies of fouling prevention.

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Membrane Technologies for Sustainable and Eco-Friendly Microbial Energy Production

Chang

Zhong

Quan

et al. 2020

Environmental Chemistry for a Sustainable World

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Improved conductivity and anti(bio)fouling of cation exchange membranes by AgNPs-GO nanocomposites

Cited by 18 publications

References 59 publications

Three-Dimensional Stable Cation-Exchange Membrane with Enhanced Mechanical, Electrochemical, and Antibacterial Performance by in Situ Synthesis of Silver Nanoparticles

Three-Dimensional Stable Cation-Exchange Membrane with Enhanced Mechanical, Electrochemical, and Antibacterial Performance by in Situ Synthesis of Silver Nanoparticles

A Review on Ion-exchange Membranes Fouling and Antifouling During Electrodialysis Used in Food Industry: Cleanings and Strategies of Prevention

Membrane Technologies for Sustainable and Eco-Friendly Microbial Energy Production

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