The roles of metal-organic frameworks in modulating water permeability of graphene oxide-based carbon membranes

Sui, Xiao; Ding, Hongru; Yuan, Zhangfu; Leong, Chanel F.; Goh, Kunli; Li, Wei; Yang, Nuo; D’Alessandro, Deanna M.; Chen, Yuan

doi:10.1016/j.carbon.2019.03.049

Cited by 54 publications

(27 citation statements)

References 68 publications

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“…S7B). The increase in d-spacing is not in accordance to the ionic radius of La 3+ (~1.16 Å) (43) because GO nanosheets are flexible, and the interlayer spacing tends to constrict back at regions without La 3+ intercalation, leaving only a slightly enlarged d-spacing (44). In the wet state, the SFGO-La 3+ membrane swelled to various extents, depending on the solvents used (Fig.…”

Section: Membrane Characterizationmentioning

confidence: 99%

Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration

et al. 2020

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Membranes for organic solvent nanofiltration (OSN) or solvent-resistant nanofiltration (SRNF) offer unprecedented opportunities for highly efficient and cost-competitive solvent recovery in the pharmaceutical industry. Here, we describe small-flake graphene oxide (SFGO) membranes for high-performance OSN applications. Our strategy exploits lateral dimension control to engineer shorter and less tortuous transport pathways for solvent molecules. By using La3+ as a cross-linker and spacer for intercalation, the SFGO membrane selective layer was stabilized, and size-dependent ultrafast selective molecular transport was achieved. The methanol permeance was up to 2.9-fold higher than its large-flake GO (LFGO) counterpart, with high selectivity toward three organic dyes. More importantly, the SFGO-La3+ membrane demonstrated robust stability for at least 24 hours under hydrodynamic stresses that are representative of realistic OSN operating conditions. These desirable attributes stem from the La3+ cross-linking, which forms uniquely strong coordination bonds with oxygen-containing functional groups of SFGO. Other cations were found to be ineffective.

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Section: Membrane Characterizationmentioning

confidence: 99%

Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration

et al. 2020

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“…Afterwards, with the decrease of moisture in films, free H + ions decreased and recombined with the negative functional groups immobilized on GO (such as COO–) [ 24 ] . Since the tortuous path produced by the layered stacked structure of GO makes the penetration of water molecules in the layer spacing direction [ 42,43 ] more difficult than the transport between layers, dehumidification becomes difficult and free ions cannot quickly combine with the negative functional groups. In this process, the potential difference between two sides of electrolyte gel still exists to promote the directional movement of ions in electrolyte (Figure 4h).…”

Section: Resultsmentioning

confidence: 99%

A Wearable Sustainable Moisture‐Induced Electricity Generator Based on rGO/GO/rGO Sandwich‐Like Structural Film

Chen

Xia

2021

Adv Elect Materials

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Green energy conversion is the first choice in solving contemporary energy pollution and shortages. In this work, a flexible moisture‐induced electricity generator is developed. Graphene oxide (GO) film is simply region‐treated by bilateral ultraviolet irradiation to obtain two special structural films—reduced graphene oxide (rGO)/GO/rGO sandwich‐like structural (rGrSF) film and rGrSF–GO composite film. The special sandwich‐like structure endows films with the capability to easily transport water molecules and difficultly release moisture that improves the adaptability of generator to environmental change. A single moisture‐induced electricity generator (MIEG) could supply an open circuit voltage of 215.7 mV for more than 3 h. 9 MIEGs successfully powered a light emitting diode (LED) in 1 h under moisture, and its total discharging process took about 5.5 h in a normal room condition, in which the LED kept lit for 1 h. Additionally, with outstanding flexibility, high stability, and reproducibility, the generator shows the potential in application of wearable electronics and it can generate sustainable electricity in the face of suddenly changes in humidity.

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“…[219] To effectively study nanochannel wettability, the past studies can be divided into 1D nanochannels, [220,221] 2D nanochannels, [219,222] and 3D nanochannels. [217,223] Due to the significant advances in the integration of 1D, 2D, and 3D nano channels, understanding and tuning the wettability properties of the nanochannel systems are found to be useful in many fields of application including catalysis, [224] chemical reac tions, [225] smart devices with stimuli responsiveness, [226] and directional transportation of liquids/gases, and batteries. [217] Vanadium flow batteries (VFBs), as a renewable energy source, have attracted much attention.…”

Section: Wettability-based Selectivitymentioning

confidence: 99%

Ion Selective Nanochannels: From Critical Principles to Sensing and Biosensing Applications

Soozanipour

Sohrabi

Abazar

et al. 2021

Adv Materials Technologies

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High throughput; (D) Mold and releasing issue, hard to form deep channels Large scale channel array, 2D channel, 1D nanoslit Thin film deposition 30-200 Polysilicon, Silicon dioxide, Silicon nitride, polymer (A) simple process, low cost, fast; (D) Hard to form uniform channels large scale array, 2D channel, 1D nanoslit Hot embossing >50 PET, PC, PS, PMMA, etc. (A) Simple process, low cost; (D) Easy to deformation Large scale array, 2D channel, 1D nanoslit deformation of PDMS 100-800 PDMS (A) Simple process, low cost; (D) Low yield large scale array, V-shaped channel, 2D channel Stress release 20-800 PS, PDMS, Photoresist (A) Low cost, maskless, simple process; (D) Low resolution, Low yield large scale array, V-shaped channel, 1D nanoslit Molecular self-assembly 20-800 Ti, Silicon, Polymer, etc. (A) Low cost; (D) Complex process, Low yield 2D channel, 1D nanoslit

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The roles of metal-organic frameworks in modulating water permeability of graphene oxide-based carbon membranes

Cited by 54 publications

References 68 publications

Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration

Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration

A Wearable Sustainable Moisture‐Induced Electricity Generator Based on rGO/GO/rGO Sandwich‐Like Structural Film

Ion Selective Nanochannels: From Critical Principles to Sensing and Biosensing Applications

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