The intercalation of nanoscale lattices into micro-sized graphene oxide sheets for enhancing pressure-driven desalination performances

Yu, Hao; Xiao, Guoqing; He, Yi; Fan, Yi; Xue, Mei; Li, Hongjie; Chen, Guan-Yu; Ma, Jing; Ou, Jian Zhen

doi:10.1016/j.desal.2020.114868

Cited by 29 publications

(11 citation statements)

References 60 publications

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“…In the XPS survey, the peaks for C 1s, Si 2p, O 1s, and S 2p were observed. Here, the C 1s and O 1s peaks are observed due to the remnants from the hydrophilic carbon 36 Further, the Si 2p deconvolutions revealed that there are some free −OH functionalities from hydrolyzed MPTMS, which interestingly did not find the basal hydroxyls in the prepared GO (this could be due to the lack of sufficient −OH functionalities). Thus, the peaks at 101.…”

Section: Resultsmentioning

confidence: 92%

“…The HR-XPS spectra of C 1s showed three prominent peaks at 284.85, 286.94, and 288.22 eV for C–Si, C–C, and C–O bonds, respectively . The O 1s and S 2p spectra showed one peak at 532.90 eV and one at 168.20 eV for the O–Si bonding formed due to the facile silyl-oxy bond formation via hydrolysis and the O–S bond of oxidized mercapto functionalities to −SO 3 H (note: O–Si bond formation is thermodynamically favorable due to higher bond enthalpies) . Further, the Si 2p deconvolutions revealed that there are some free −OH functionalities from hydrolyzed MPTMS, which interestingly did not find the basal hydroxyls in the prepared GO (this could be due to the lack of sufficient −OH functionalities).…”

Section: Resultsmentioning

confidence: 99%

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Solution-Phase Intercalation of 2D Hybrid SGO in Sulfonated Poly(2,6-dimethyl-1,4-phenylene oxide): Improved Electrochemical Properties and Electrodialytic Desalination Performance

Mishra

Sharma

Rathod

et al. 2022

ACS Appl. Energy Mater.

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This work investigates a strategy to overcome conventional trade-offs of long-range ionic conductivity in pristine sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO-S) via solution-phase intercalation of synthesized hybrid sulfonated graphene oxide (hSGO) in an SPPO-S matrix. The hSGO nanocomposite was prepared via covalent functionalization of GO through facile silyl-oxy bond formation using 3-mercaptopropyl trimethoxy silane (MPTMS). A series of nanocomposite membranes (ShGO) with low (0.1, 0.2, 0.5, 0.8 wt %) to high (1.0, 2.0, 5.0 wt %) hSGO concentrations were fabricated, and the influence of hSGO on physicochemical and electromembrane transport properties was evaluated. XPS and ζ-potential measurements illustrated that the hydrophilic hSGO with a spacer-type trimethylene sulfonic acid [(−CH2)3–SO3H] moiety establishes a dynamic interaction via means of intermolecular H-bonding and short-range electrostatic interactions, respectively. With 0.5 wt % hSGO, the membranes showed excellent physicochemical attributes (i.e., IEC = 1.24 mequiv g–1 and WU = ∼44%) with improved ionic conductivity by ∼43% (i.e., κm = 1.92 × 10–2 S cm–1) in contrast to pristine SPPO-S (i.e., IEC = 0.98 mequiv g–1; WU = 37.12%; κm = 1.34 × 10–2 S cm–1). Chemical structures and phases were confirmed using NMR, FT-IR, XRD, XPS, etc. The i–V characteristics illustrated that the high I lim 1 of nanocomposite membranes alleviated the ion percolation and influenced the operational potential to a broader range for lower power consumptions (PCs) and higher current efficiencies (CEs). ShGO-0.5 showed PC as low as 1.04 kWh kg–1 and CE as high as ∼88% during electrodialytic brackish water desalination. In summary, the prepared membranes may be promising candidates for electrodialytic brackish water desalination with a high salt removal (≥93%) efficiency.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Solution-Phase Intercalation of 2D Hybrid SGO in Sulfonated Poly(2,6-dimethyl-1,4-phenylene oxide): Improved Electrochemical Properties and Electrodialytic Desalination Performance

Mishra

Sharma

Rathod

et al. 2022

ACS Appl. Energy Mater.

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“…It is the graphene nanosheets’ horizontal ( Ld , lateral size) and vertical ( d , interlayer spacing) orientations that define the overall length of the transport channel. The shorter transport route is caused by a nanosheet with reduced lateral size . According to eq , the length ( S ) of the water molecule and the ion transport channel of these membranes was estimated …”

Section: Resultsmentioning

confidence: 99%

Fabrication of Graphene-Based Nanofiltration Membrane from Fractionated Bamboo Lignin for Dye Removal and Desalination

Ahmad Farid,

Sabidi,

Ruozhu

et al. 2023

ACS Appl. Eng. Mater.

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The growing demand for sustainable and renewable materials has driven extensive research into the use of lignocellulosic biomass as a promising feedstock for the development of advanced biobased membranes. In this present work, we established the viability of producing greener lignin-derived graphene oxide (bGO) and reduced graphene oxide (brGO) membranes from bamboo biomass to fabricate an ordered two-dimensional (2D) laminar channel for nanofiltration. It is imperative to emphasize that our methodology is intricately designed as a sequential strategy for the synthesis of bGO and brGO. This meticulously orchestrated sequence encompasses graphitization followed by consecutive oxidation and reduction processes, all unfolding prior to the subsequent facile layer-by-layer deposition, a pivotal step in membrane fabrication. The as-prepared bGO and brGO membranes showed nanosize pore openings of 1.15 and 0.03 nm and water pathway lengths of 65.15 and 49.09 nm, respectively. Pronounce enhancement by 52-to 60-fold in water permeance was exhibited using the brGO membrane for rejection of organic dyes (methylene blue, MB; direct red 81, DR-81) and salt (sodium sulfate, Na 2 SO 4 ) solutions compared to lignin-derived graphene oxide (bGO) membrane while the rejections remained comparable at 88, 99, and 57.6% for Na 2 SO 4 , MB, and DR-81, respectively. The brGO membrane's remarkable mechanical stability was also proven in an ultrasound test, withstanding up to 2 h without swelling and hence resistant to disintegration under solution immersion conditions. This work provides insight into the fabrication of graphene-based membranes from biomass for highly efficient nanofiltration performance and sheds some light on the transport mechanism within 2D laminar channels.

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“…The cation control method uses monovalent, divalent, and trivalent cations, , which inhibit the swelling of a GO membrane in water and facilitate the adsorption of charged contaminants onto the GO nanosheets. As the main part of the cation−π interaction is electrostatic, it induces a cross-linking effect that helps control the interlayer spacing as well as improve membrane selectivity.…”

Section: Modification Of Go Membranesmentioning

confidence: 99%

Recent Advances in Graphene Oxide Membranes for Nanofiltration

Yang

Xiao

Shen

et al. 2022

ACS Appl. Nano Mater.

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Advanced membrane separation technology plays an important role in achieving excellent water treatment, which can help solve the freshwater crisis. However, there remains a trade-off between membrane permeability and selectivity. An emerging candidate to address this issue is graphene oxide (GO), a two-dimensional (2D) laminated graphene derivative with abundant oxygen functional groups. Furthermore, the transport channels of GO-based membranes can be artificially modified and manipulated, exhibiting great promise for GO in the field of water purification and molecular separation. This review comprehensively summarizes the research advances on 2D GO-based membranes for high-performance nanofiltration (NF). It begins with an elaboration on the preparation methods of GO-based membranes, followed by a detailed summary of the chemical modification and physical manipulation of transport channels. Then we reviewed the current research progress of theoretical calculation and molecular dynamics simulation. Also, the high NF performance of GO-based membranes is presented. Finally, the remaining challenges and future prospects in order to develop advances in membrane technology are provided.

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The intercalation of nanoscale lattices into micro-sized graphene oxide sheets for enhancing pressure-driven desalination performances

Cited by 29 publications

References 60 publications

Solution-Phase Intercalation of 2D Hybrid SGO in Sulfonated Poly(2,6-dimethyl-1,4-phenylene oxide): Improved Electrochemical Properties and Electrodialytic Desalination Performance

Solution-Phase Intercalation of 2D Hybrid SGO in Sulfonated Poly(2,6-dimethyl-1,4-phenylene oxide): Improved Electrochemical Properties and Electrodialytic Desalination Performance

Fabrication of Graphene-Based Nanofiltration Membrane from Fractionated Bamboo Lignin for Dye Removal and Desalination

Recent Advances in Graphene Oxide Membranes for Nanofiltration

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