Effect of cations on stabilizing graphene oxide membranes in aqueous solutions

Zhao, Hongyuan; Yang, Jing; Zheng, Li; Geng, Yiyun; He, Shiying; Chen, Mumei; Li, Ruifen; Li, Qingnuan; Zhang, Lan

doi:10.1016/j.apsusc.2019.05.184

Cited by 12 publications

(7 citation statements)

References 33 publications

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“…After 10 times of washing, the resistance of RGO@PU20 fiber increased by only 10%, indicating that the prepared conductive fiber has excellent washing resistance. The excellent durability of water washing is attributed to the crosslinking interactions of Al 3+ between adjacent RGO flakes [ 57,58 ] as well as the adhesive interaction of BSA. As illustrated in Figure 4h, Al 3+ could effectively form coordination bonds with residual oxygen‐containing groups, especially carboxyl groups from two or more adjacent RGO sheets, which improves the firmness of RGO coating and consequently retains the excellent strain sensing properties of RGO@PU20 fiber.…”

Section: Resultsmentioning

confidence: 99%

“…After 10 times of washing, the resistance of RGO@PU20 fiber increased by only 10%, indicating that the prepared conductive fiber has excellent washing resistance. The excellent durability of water washing is attributed to the crosslinking interactions of Al 3+ between adjacent RGO flakes [57,58] as well as the adhesive interaction of BSA. ) Relative resistance variation of RGO@PU20 fiber in the strain range of 0-80%, the inset shows the linear strain range of 0-20%.…”

Section: Strain Sensing Performancementioning

confidence: 99%

See 1 more Smart Citation

Graphene Decorated Fiber for Wearable Strain Sensor with High Sensitivity at Tiny Strain

Chen

Zhang

Song

et al. 2021

Adv Materials Technologies

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Although considerable accomplishments have been achieved, it remains a big challenge to prepare wearable strain sensors with high sensitivity and broad sensing range simultaneously. [3][4][5][6] To achieve a balance between high sensitivity and broad range, the effects of some factors like substrate stiffness and interfacial interactions between conductive nanomaterials and elastic polymers on the performance of strain sensors have been investigated. [7,8] Cao et al. prepared fiberbased strain sensors with different GF and work ranges by adjusting the bonding layer between silver nanowires and PU substrate. Specially, a wide work range of 0-50% and a large GF of 940 were both possessed for Ag NW/PU-9.2 wt%/5 min fiber. However, GF was still very small at low strain range (from 0.1 to 118 within 35% strain). [9] Recently, rational design of the geometric structure is considered as an effective strategy to solve the above dilemma between high sensitivity and broad workable range for strain sensors. Flexible strain sensors with novel microstructures, [10][11][12][13] including the crack structure, [14][15][16] the buckling structure, [17,18] the gradient structure [19][20][21] and the biomimetic hierarchical structure, [22] have been reported for fabricating highperformance strain sensors. Gao et al. prepared a multilayered fiber-based strain sensor with high sensitivity and broad workable range (GF = 166.7 at 350% strain) with a hollow-monolith microstructure through a coaxial wet-spun method. [23] To date, many wearable strain sensors based on graphene have been studied owing to its outstanding electrical, mechanical, and thermal properties. [24][25][26][27] Wang et al. developed a strain sensor based on reduced graphene oxide (RGO)-decorated PU electrospun mats, and GF = 11 at 10% strain and GF = 79 at 100% strain were obtained. [28] Cheng et al. presented a graphene-based fiber with a "compression spring" structure, which possessed a detection limit of 0.2% strain (GF = 10 within 1% strain) and broad workable range (100%). [29] However, the above studies always show low sensitivity (GF < 20), especially at low strain range, due to the slippage of graphene flakes. To increase the sensitivity of graphene-based sensor, different polymers have been used as "mortars" with graphene flakes as "bricks," including bovine serum albumin (BSA), [30] chitosan, [31] poly(vinyl alcohol), [32] and polyethylenimine (PEI). [33] However, the above polymers are always nonconductive, which It remains a challenge to achieve high sensitivity and a broad linear strain range simultaneously for wearable strain sensors. Specially, graphene-based strain sensors always exhibit low sensitivity owing to the slippage of graphene flakes. To overcome this problem, Al 3+ is used here as "mortars" for graphene flakes instead of polymers usually used in the literature, and thus a very simple and low-cost strategy is developed to prepare a high-performance reduced graphene oxide coated fiber strain sensor. The strain sensor shows a low detection lim...

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Section: Resultsmentioning

confidence: 99%

“…After 10 times of washing, the resistance of RGO@PU20 fiber increased by only 10%, indicating that the prepared conductive fiber has excellent washing resistance. The excellent durability of water washing is attributed to the crosslinking interactions of Al 3+ between adjacent RGO flakes [57,58] as well as the adhesive interaction of BSA. ) Relative resistance variation of RGO@PU20 fiber in the strain range of 0-80%, the inset shows the linear strain range of 0-20%.…”

Section: Strain Sensing Performancementioning

confidence: 99%

Graphene Decorated Fiber for Wearable Strain Sensor with High Sensitivity at Tiny Strain

Chen

Zhang

Song

et al. 2021

Adv Materials Technologies

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show abstract

“…Another crucial issue is that the diameter of the channels in 2D membrane (commonly referred to as interlayer spacing or d -spacing) is not constant in different aqueous solutions. , Because of the ion and water intercalation, the membrane nanostructures exhibited complex changes when immersing into the solutions, leading to a significant influence on intermediate ion transport behavior . Nevertheless, because the accurate measurements of membrane structural changes under various charged conditions during the electrostatic manipulating still pose a technical challenge, in previous studies on voltage-gated ionic fluids in 2D membranes as described above, the effect of susceptible nanostructure on the ion modulation was seldom fully addressed or was even largely neglected. − Ren et al employed X-ray diffraction (XRD) to characterize the interlayer spacing variations; however, the measurement was conducted after the permeation experiment was suspended and the membrane was completely dried.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, because the accurate measurements of membrane structural changes under various charged conditions during the electrostatic manipulating still pose a technical challenge, in previous studies on voltage-gated ionic fluids in 2D membranes as described above, the effect of susceptible nanostructure on the ion modulation was seldom fully addressed or was even largely neglected. − Ren et al employed X-ray diffraction (XRD) to characterize the interlayer spacing variations; however, the measurement was conducted after the permeation experiment was suspended and the membrane was completely dried. There is skepticism about the accuracy of XRD because extensive research has confirmed that the d -spacing of lamellar membranes in the hydration/dehydration state shows quite different structural features. , A quartz crystal microbalance with dissipation (QCM-D) monitoring provides simultaneous assessments of structural characteristics with high sensitivity (∼2 ng/cm 2 ) and time resolution (∼100 Hz). By monitoring the vibration frequency and dissipation of the piezoelectric sensor under a sinusoidal voltage input, , QCM-D can accurately characterize the variation of the quality and porous structure of the membrane in situ.…”

Section: Introductionmentioning

confidence: 99%

“…There is skepticism about the accuracy of XRD because extensive research has confirmed that the d-spacing of lamellar membranes in the hydration/dehydration state shows quite different structural features. 18,19 A quartz crystal microbalance with dissipation (QCM-D) monitoring provides simultaneous assessments of structural characteristics with high sensitivity (∼2 ng/cm 2 ) and time resolution (∼100 Hz). By monitoring the vibration frequency and dissipation of the piezoelectric sensor under a sinusoidal voltage input, 20,21 QCM-D can accurately characterize the variation of the quality and porous structure of the membrane in situ.…”

Section: Introductionmentioning

confidence: 99%

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Insight into Manipulation Mechanism of Ion Transport through Angström-Scale Channels in Ti₃C₂T_x Membrane by Controlling Surface Potential Using Electrochemical Quartz Crystal Microbalance with Dissipation

Wang

Yang

et al. 2020

J. Phys. Chem. C

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A lamellar membrane assembled by parallel restacking of two-dimensional nanosheets provides a novel platform for studying the electrostatic manipulation of ion mobility under angstrom-scale confinement. The membrane nanostructure in aqueous solution is unstable due to intercalation. However, because accurate measurements of structural changes under different charged conditions are difficult, their effect on the ion modulation was seldom fully addressed, and the electrostatic modulation mechanism was not good. Here, we report the efficient manipulation of ion diffusion in the confined channels through a Ti 3 C 2 T x membrane and gain insight into the mechanism by an in situ measurement of the lamellar nanostructure using an electrochemical quartz crystal microbalance with dissipation (EQCM-D). By precisely tuning the external potential directly applied to the membrane, the ion permeation rate can be effectively and reversibly increased by 6 times or decreased by 15 times. The EQCM-D measurement provides empirical evidence to demonstrate that the anomalous ionflow modulation is determined by both the channel diameter and an ion rearrangement in the electrical double layers (EDLs), particularly, in the Stern layers. Although the channel expanded at low negative voltage, the ion permeation rate decelerated due to the counterion distribution in the Stern layers.

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Graphene oxide/methylene blue composite membrane for dyes separation: Formation mechanism and separation performance

Hou

Chen

Shi

et al. 2020

Applied Surface Science

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Effect of cations on stabilizing graphene oxide membranes in aqueous solutions

Cited by 12 publications

References 33 publications

Graphene Decorated Fiber for Wearable Strain Sensor with High Sensitivity at Tiny Strain

Graphene Decorated Fiber for Wearable Strain Sensor with High Sensitivity at Tiny Strain

Insight into Manipulation Mechanism of Ion Transport through Angström-Scale Channels in Ti₃C₂T_x Membrane by Controlling Surface Potential Using Electrochemical Quartz Crystal Microbalance with Dissipation

Graphene oxide/methylene blue composite membrane for dyes separation: Formation mechanism and separation performance

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Effect of cations on stabilizing graphene oxide membranes in aqueous solutions

Cited by 12 publications

References 33 publications

Graphene Decorated Fiber for Wearable Strain Sensor with High Sensitivity at Tiny Strain

Graphene Decorated Fiber for Wearable Strain Sensor with High Sensitivity at Tiny Strain

Insight into Manipulation Mechanism of Ion Transport through Angström-Scale Channels in Ti3C2Tx Membrane by Controlling Surface Potential Using Electrochemical Quartz Crystal Microbalance with Dissipation

Graphene oxide/methylene blue composite membrane for dyes separation: Formation mechanism and separation performance

Contact Info

Product

Resources

About

Insight into Manipulation Mechanism of Ion Transport through Angström-Scale Channels in Ti₃C₂T_x Membrane by Controlling Surface Potential Using Electrochemical Quartz Crystal Microbalance with Dissipation