Layer-by-layer assembly of graphene oxide (GO) on sulfonated polyethersulfone (SPES) substrate for effective dye removal

Tavangar, Tohid; Hemmati, Amin; Karimi, Mohammad; Ashtiani, Farzin Zokaee

doi:10.1007/s00289-018-2357-3

Cited by 24 publications

(7 citation statements)

References 35 publications

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“…28,29 In addition, the spectrum of the SPES substrate presented a new broadband peak of −SO 3 H groups at about 3100−3500 cm −1 , suggesting the presence of SPES, that is, the successful blending of SPES with PES. 30 Because of the low content of QGO, there were no strong characteristic QGO peaks observed. However, the peak around 2900 cm −1 became more evident in the spectra of the QSPES support layer, which could be attributed to the vibration of aliphatic −CH 3 groups of QGO.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Several characteristic peaks of PES can be found in the spectrum of all support layers. For example, the peak at 1450 and 1560 cm –1 is attributed to the aromatic ring vibration, and the peaks at 1250 and 116 cm –1 are attributed to the −SO stretching mode of the sulfone groups in the PES polymer chains. , In addition, the spectrum of the SPES substrate presented a new broadband peak of −SO 3 H groups at about 3100–3500 cm –1 , suggesting the presence of SPES, that is, the successful blending of SPES with PES . Because of the low content of QGO, there were no strong characteristic QGO peaks observed.…”

Section: Resultsmentioning

confidence: 99%

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Polyethersulfone–Quaternary Graphene Oxide–Sulfonated Polyethersulfone as a High-Performance Forward Osmosis Membrane Support Layer

2022

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The stability and compatibility of a nanomaterial in a substrate matrix are a tough challenge in preparing thin-film nanocomposite membranes. In this study, we fabricated a ternary nanocomposite membrane substrate consisting of polyethersulfone (PES), quaternary graphene oxide (QGO), and sulfonated polyethersulfone (SPES). First, SPES was blended with the PES substrate, and then different concentrations of QGO were incorporated within this substrate. The effect of QGO on the substrate morphology, hydrophilicity, and porosity was analyzed via scanning electron microscopy, water contact angle measurement, and gravimetric methods, respectively. The optimum loading of QGO significantly enhanced the hydrophilicity, porosity, and water permeability of the PES/SPES support layer. In addition, the effect of QGO on the polyamide rejection layer morphology and performance was thoroughly investigated. The result shows that a thin, smooth, and defect-free polyamide (PA) layer was formed on hydrophilic QGO-based substrates. Intrinsic separation performance data verified these results, where the PA layer formed on the QGO-based substrate presented the highest water permeability. The forward osmosis test also demonstrated the positive impact of QGO incorporation on the performance of membrane substrates. The optimal TFC-QS0.5 (containing 0.5 wt % of QGO) membrane has a water flux of 24.4 LMH in the forward osmosis mode and 32.1 LMH in the pressure-retarded osmosis mode when using a 1 M NaCl draw solution and deionized water feed solution.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Polyethersulfone–Quaternary Graphene Oxide–Sulfonated Polyethersulfone as a High-Performance Forward Osmosis Membrane Support Layer

2022

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“…As the weight ratio of the graft copolymer increases, the affinity of the casting solution to nonsolvent increases, causing a slower exchange rate for solvent and nonsolvent during phase separation before solidification. A slower solvent and non-solvent exchange rate favors the formation of larger finger-like pores and suppresses the formation of sponge-like morphology [50,51].…”

Section: Characterization Of the Psf-g-pdma Copolymer Blended Substratementioning

confidence: 99%

Improved performance of thin-film composite forward osmosis membrane with click modified polysulfone substrate

et al. 2020

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“…XRD patterns were used to determine the change of the material crystalline nature. The crystalline nature plays a very important role in understanding the substance's solubility [43,44]. The X-ray diffractograms of the prepared membranes with different DS and SPES/NPHCs ratios are presented in Figures 4 and 5, respectively.…”

Section: Characterization Of Polymer Structure-morphology (Spes and Nphcs)mentioning

confidence: 99%

Fabrication of a Cation-Exchange Membrane via the Blending of SPES/N-Phthaloyl Chitosan/MIL-101(Fe) Using Response Surface Methodology for Desalination

et al. 2022

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In the present work, a novel mixed matrix cation exchange membrane composed of sulfonated polyether sulfone (SPES), N-phthaloyl chitosan (NPHCs) and MIL-101(Fe) was synthesized using response surface methodology (RSM). The electrochemical and physical properties of the membrane, such as ion exchange capacity, water content, morphology, contact angle, fixed ion concentration and thermal stability were investigated. The RSM based on the Box–Behnken design (BBD) model was employed to simulate and evaluate the influence of preparation conditions on the properties of CEMs. The regression model was validated via the analysis of variance (ANOVA) which exhibited a high reliability and accuracy of the results. Moreover, the experimental data have a good fit and high reproducibility with the predicted results according to the regression analysis. The embedding of MIL-101(Fe) nanoparticles contributed to the improvement of ion selective separation by forming hydrogen bonds with the polymer network in the membrane. The optimum synthesis parameters such as degree of sulfonation (DS), the content of SPES and NPHCs and the content of MIL-101(Fe) were acquired to be 30%, 85:15 and 2%, respectively, and the corresponding desalination rate of the CEMs improved to 136% while the energy consumption reduced to 90%. These results revealed that the RSM was a promising strategy for optimizing the preparation factors of CEMs and other similar multi-response optimization studies.

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Layer-by-layer assembly of graphene oxide (GO) on sulfonated polyethersulfone (SPES) substrate for effective dye removal

Cited by 24 publications

References 35 publications

Polyethersulfone–Quaternary Graphene Oxide–Sulfonated Polyethersulfone as a High-Performance Forward Osmosis Membrane Support Layer

Polyethersulfone–Quaternary Graphene Oxide–Sulfonated Polyethersulfone as a High-Performance Forward Osmosis Membrane Support Layer

Improved performance of thin-film composite forward osmosis membrane with click modified polysulfone substrate

Fabrication of a Cation-Exchange Membrane via the Blending of SPES/N-Phthaloyl Chitosan/MIL-101(Fe) Using Response Surface Methodology for Desalination

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