Temperature resistant cross-linked brominated poly phenylene oxide-functionalized graphene oxide nanocomposite anion exchange membrane for desalination

Goel, Priya; Mandal, Priyabrata; Bhuvanesh, E.; Shahi, Vinod K.; Chattopadhyay, Sujay

doi:10.1016/j.seppur.2020.117730

Cited by 42 publications

(22 citation statements)

References 60 publications

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“…After seven runs of desalination, the current efficiency could still be maintained at 91.82% (the η retention after various electrodialysis runs is shown in Figure d; the conductivity of the NaCl solution in the dilute cell after various electrodialysis runs is shown in Figure S17). The desalination durability was rarely reported in the literature, and our η retention was at a similar level compared with the result reported by Li et al Compared with other reported AEMs for desalination, ,,− the current efficiency of the 3QA16C16-3O16 membrane is at a higher level (as shown in Figure b).…”

Section: Resultsmentioning

confidence: 67%

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Dual-Side-Chain-Grafted Poly(phenylene oxide) Anion Exchange Membranes for Fuel-Cell and Electrodialysis Applications

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Anion exchange membranes (AEMs) usually suffer from the "trade-off" between ion conduction and stability. In this work, a series of dual-side-chain-grafted poly(phenylene oxide) AEMs were synthesized to explore how the side-chain architectures influence membrane performance. Our investigations suggest that the AEM containing both a long hydrophobic extender (attached to the cation's central atom) and a hydrophilic additional side chain (beside the cation) show high hydroxide conductivity (21.3 mS/cm at 30 °C) and good chemical and dimensional stability (90.5% conductivity retention after 1 M NaOH treatment at 60 °C for 528 h). In addition, when a tri-cation side chain and a hydrophobic side chain are incorporated simultaneously, the resulting AEM shows further improved conductivity and stability (50.0 mS/cm at 30 °C; 90.6% conductivity retention after 1 M NaOH treatment at 60 °C for 528 h); it also shows excellent electrochemical performance when applied in a fuel cell and an electrodialyzer, accomplishing a peak power density of 506 mW/cm 2 and a current efficiency of 96.11%, respectively. Our side-chain manipulation strategy provides a new and effective pathway to balance the ionic conductivity and stability of AEMs.

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Section: Resultsmentioning

confidence: 67%

“…(a) Fuel-cell peak power density of PPO-based AEMs in this work in comparison with that reported in the literature; ,,,,,− (b) current efficiency of the electrodialysis in this work compared with that reported in the literature. ,,− …”

Section: Resultsmentioning

confidence: 99%

Dual-Side-Chain-Grafted Poly(phenylene oxide) Anion Exchange Membranes for Fuel-Cell and Electrodialysis Applications

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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“…29 In the case of CMPSF, the appearance of a new peak is noted at 745 cm −1 (Figure S10b), which corresponds to the stretching vibration of the C−Cl bond of −CH 2 Cl groups. 30 Similarly, transmittance peaks corresponding to 3373 and 1670 cm −1 indicate the stretching and bending vibrations, respectively, from the quaternary ammonium group of QPSF 31 (Figure S10b). This ensures conversion of chloromethyl groups to quaternary ammonium groups.…”

Section: Resultsmentioning

confidence: 99%

Potential of Dipicolinic Acid as a Water-Dissociating Catalyst in a Bipolar Membrane

Eswaraswamy

Mandal

Goel

et al. 2021

ACS Appl. Polym. Mater.

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Bipolar membranes (BPMs) are increasingly being applied in chemical recovery and energy storage fields due to their unique water dissociation ability under reverse bias. BPMs capable of dissociating water at a lower potential will minimize energy consumption, and it depends on the thickness asymmetry between the cation exchange layer (CEL)/anion exchange layer (AEL) and the right catalyst material used at the interface of CEL/AEL. In this report, a heteroaromatic compound, 2,6-pyridine-dicarboxylic acid (also known as dipicolinic acid, DPA), is being proposed to be an effective interface catalyst for BPM made of sulfonated poly(ether ether ketone) (CEL) and quaternized polysulfone (AEL). The optimum concentration of DPA as an interface layer over fabricreinforced AEL was found using an adsorption study. The thickness asymmetry between CEL and AEL (without catalyst) alone could lower the water dissociation onset potential (U diss ) to 0.72 V, which was further reduced to 0.70 V using DPA as an interface catalyst. After 5 h of electrodialysis experiments at 25 mA• cm −2 , the acid (or base) concentration increased from ∼0.19 mol•L −1 (without catalyst) to 0.21 mol•L −1 due to the presence of DPA at the interface. Meanwhile, operational studies performed using synthetic reverse osmosis (RO) reject of sea water confirm the consistency in the acid−base production during multiple cycles.

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“…SPEEK of 75.0% degree of sulfonation was synthesized following method reported by Bhattd et al 33 Details on synthesis steps followed and its characterization using 1 H NMR and ATR‐IR were reported as supporting information (in section S1, Figure S1 and S2). GO was synthesized in house following modified hummers method with minor modification as indicated in our previous article 34 . Nylon based woven fabric (150 mesh count per inch with opening area of 44.44%) was used as reinforcement and was purchased from local suppliers.…”

Section: Methodsmentioning

confidence: 99%

Nanocomposite interface coupled with thickness optimization promoting water dissociation in heterogeneous bipolar membrane

Eswaraswamy

Goel

Mandal

et al. 2021

Polymers for Advanced Techs

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Bipolar membranes (BPMs) are multilayered composite film containing an interface layer sandwiched between cation exchange layer (CEL) and anion exchange layer (AEL), and are capable of dissociating water molecules under reverse bias potential. Woven fabric supported heterogeneous bipolar membranes (HBMs) were synthesized adopting layer‐by‐layer solvent casting technique. Nanocomposite layer based on sulfonated polyether ether ketone (SPEEK) and GO (graphene oxide) were applied at the interface of CEL/AEL made of cation/anion exchange resins and poly (vinyl chloride) as binder to advance water dissociation in HBMs. Thickness of monopolar layers were initially optimized without any interfacial layer. Introduction of SPEEK interface substantially lowered onset water dissociation potential, Udiss (~1.87 V) relative to the HBM without interface (~3.27 V), which got further reduced (~1.80 V) by nanocomposite (GO + SPEEK) interface. Udiss recorded with SPEEK + GO as interface was much lower than some of the recently reported homogeneous BPM. The NaOH production from NaCl (1.0 mol⋅L−1) solution in a bipolar membrane electrodialysis set up containing synthesized HBM with nanocomposite interface (SPEEK + GO) was double than that of NaOH concentration obtained with HBM having no interface, where the current density was fixed at 50.0 mA·cm−2. Careful optimization of monopolar/interface layer thickness and composition of nanocomposite interface results in developing cost effective HBMs facilitating water dissociation at lower potential.

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Temperature resistant cross-linked brominated poly phenylene oxide-functionalized graphene oxide nanocomposite anion exchange membrane for desalination

Cited by 42 publications

References 60 publications

Dual-Side-Chain-Grafted Poly(phenylene oxide) Anion Exchange Membranes for Fuel-Cell and Electrodialysis Applications

Dual-Side-Chain-Grafted Poly(phenylene oxide) Anion Exchange Membranes for Fuel-Cell and Electrodialysis Applications

Potential of Dipicolinic Acid as a Water-Dissociating Catalyst in a Bipolar Membrane

Nanocomposite interface coupled with thickness optimization promoting water dissociation in heterogeneous bipolar membrane

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