Manipulating Migration Behavior of Magnetic Graphene Oxide via Magnetic Field Induced Casting and Phase Separation toward High-Performance Hybrid Ultrafiltration Membranes

Xu, Zhiwei; Wu, Tengfei; Shi, Jie; Wang, Wei; Teng, Kunyue; Qian, Xiaoming; Shan, Mingjing; Deng, Hui; Xu, Tongwen; Li, Cuiyu; Li, Fengyan

doi:10.1021/acsami.6b04083

Cited by 95 publications

(31 citation statements)

References 71 publications

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“…A GO/Co 3 O 4 ‐incorporated UF membrane exhibited excellent resistance against Escherichia coli (E. coli) , and the flux recovery ratio (FRR) after activated sludge fouling was also largely improved . In contrast, the presence of GO/Fe 3 O 4 in a membrane imparted a superior fouling resistance to bovine serum albumin (BSA) . The metal oxide nanoparticles were revealed to covalently bond to the GO surface, forming monodentate or bidentate complexes .…”

Section: Preparation Of Functionalized Graphenementioning

confidence: 99%

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Graphene Oxide‐Based Polymeric Membranes for Water Treatment

Xiao

Zhao

Tian

et al. 2018

Adv Materials Inter

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their energy consumption is much lower than that of thermal approaches. [3] Therefore, membrane technologies are regarded as cost-effective candidates and play an increasingly important role in the treatment of natural waters and wastewaters. [4] Membrane processes for water purification and desalination can be generally classified into microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), and emerging forward osmosis (FO) according to the pore size of the membrane and the respective rejection mechanism. The materials used to fabricate the membranes cover a wide range of polymers and inorganic materials. By far, polymeric membranes are the most widespread type due to their high processability, high flexibility, and low cost. [5][6][7] Traditional asymmetric membranes that contain only one type of polymer are mainly used for UF and a few NF applications. These membranes exhibit an asymmetric porous structure that consists of a thin nano porous active layer and a microporous underlying layer. MF membranes, however, possess a relatively symmetric micro porous structure. These porous membranes are mainly fabricated by phase inversion. For RO, FO, and most NF membranes that reject nanoscale solutes, an individual nonporous, dense, and thin polyamide (PA) active layer is normally required and is deposited onto a porous support layer to ensure a high selectivity. The active layer is prepared via interfacial polymerization (IP), while the support layer can be fabricated by phase inversion. These membranes are known as thin film composite (TFC) membranes, and the layers are comprised of different polymers. TFC membranes possess superior permeability over that of first-generation cellulose acetate membranes. [8,9] Although polymeric membranes have been widely reported in scientific studies and utilized for industrial applications, they are restricted by the inherent limitations of the material, such as a permeability/selectivity trade-off and a low fouling resistance. The current ability to control the membrane structure in both molecular-level design and fabrication process is not satisfactory. [10] In the last decade, the incorporation of nanomaterials into polymeric membranes has gained considerable attention owing to the potential of the resulting materials for overcoming the above limitations. [11,12] These advanced composite membranes have shown enhanced performance with a low loading of nanoparticles (NPs), including zeolites, [13][14][15] silica, [16][17][18][19][20][21][22] Membrane technologies for water treatment and desalination are increasingly developed and utilized to address the global challenges of water security and supply. Membrane-based separations can produce water with desirable qualities from a wide range of water sources, such as groundwater, seawater, brackish water, and wastewater. However, the membranes, which are typically made from polymers, are still restricted by their inherent limitations, including a permeability/selectivity trade-off and a high fouling prop...

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Section: Preparation Of Functionalized Graphenementioning

confidence: 99%

“…The resultant TFC FO membrane showed a much higher permeability than conventionally casted membranes. Xu et al prepared a Fe 3 O 4 /GO/PVDF UF membrane via a magnetic field–induced casting technique. A magnetic field was applied horizontally to the casting solution.…”

Section: Preparation Of Functionalized Graphene–polymer Membranesmentioning

confidence: 99%

Graphene Oxide‐Based Polymeric Membranes for Water Treatment

Xiao

Zhao

Tian

et al. 2018

Adv Materials Inter

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“…Finally, the composite membranes were washed with distilled water for 30 min to remove pollutant before measuring the water flux (J w2 ). To further investigate the fouling process, the flux recovery ratio (FRR), the total fouling ratio (R t ), reversible fouling ratio (R r ) and irreversible fouling ratio (R ir ) were determined as follows [31]:…”

Section: Antifouling Testsmentioning

confidence: 99%

High flux and rejection of hierarchical composite membranes based on carbon nanotube network and ultrathin electrospun nanofibrous layer for dye removal

Teng

et al. 2017

Journal of Membrane Science

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“…XPS and EDS had different capabilities, limitations, and depths of analysis, and these techniques might provide differing results from each other (Gorzalski et al 2017;Xu et al 2016). In order to understand the migration behavior of FGO, we attempted to use XPS, EDS, and indirect computation to detect oxygen contents in different depths of membranes and then analyzed FGO contents in the top layer, sublayer, and the whole membrane, respectively.…”

Section: Compatibility Of Fgo In Casting Solutionmentioning

confidence: 99%

Optimized permeation and antifouling of PVDF hybrid ultrafiltration membranes: synergistic effect of dispersion and migration for fluorinated graphene oxide

Shi

Chen

et al. 2017

J Nanopart Res

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Nanoparticles may have suffered from low modification efficiency in hybrid membranes due to embedding and aggregating in polymer matrix. In order to analyze the modification mechanisms of nanoparticle migration and dispersion on the properties of hybrid membranes, we designed different F/O ratios (R F/O ) of fluorinated graphene oxide (FGO, diameter = 1.5~17.5 μm) by carbon tetrafluoride (CF 4 ) plasma treatment GO for 3, 5, 10, 15, and 20 min and successfully prepared novel PVDF hybrid membranes containing FGO via the phase inversion method. After a prolonged plasma treatment, the R F/O of FGO was enhanced sharply, indicating an increasing compatibility of FGO with the matrix, especially FGO-20 (GO treated for 20 min). FGO contents in the top layer, sublayer, and the whole of membranes were probed by Xray photoelectron spectroscopy, energy-dispersive spectrometer, and indirect computation, respectively. In the top layer of membranes, FGO contents declined from 13.14 wt% (PVDF/GO) to 4.00 wt% (PVDF/FGO-10) and 1.96 wt% (PVDF/FGO-20) due to the reduced migration ability of FGO. It is worth mentioning that PVDF/FGO-10 membranes exhibited an excellent water flux and flux recovery rate (up to 406.90 L m −2 h −1 and 88.9%), which were improved by 67.3% and 14.6% and 52.5% and 24.0% compared with those of PVDF/GO and PVDF/FGO-20 membranes, respectively, although the dispersion and migration ability of FGO-10 was maintained at a moderate level. It indicated that the migration and dispersion of FGO in membranes could result in dynamic equilibrium, which played a key role in making the best use of nanomaterials to optimize membrane performance.

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Manipulating Migration Behavior of Magnetic Graphene Oxide via Magnetic Field Induced Casting and Phase Separation toward High-Performance Hybrid Ultrafiltration Membranes

Cited by 95 publications

References 71 publications

Graphene Oxide‐Based Polymeric Membranes for Water Treatment

Graphene Oxide‐Based Polymeric Membranes for Water Treatment

High flux and rejection of hierarchical composite membranes based on carbon nanotube network and ultrathin electrospun nanofibrous layer for dye removal

Optimized permeation and antifouling of PVDF hybrid ultrafiltration membranes: synergistic effect of dispersion and migration for fluorinated graphene oxide

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