High efficiency and selective removal of Cu(Ⅱ) via regulating the pore size of graphene oxide/montmorillonite composite aerogel

Xin, Hao; Yang, Shuyi; E, Tao; Li, You

doi:10.1016/j.jhazmat.2021.127680

Cited by 44 publications

(20 citation statements)

References 62 publications

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“…In Figure 42(a), the peaks of 1421 and 1600 cm −1 shift to 1423 and 1602 cm −1 , suggesting that the −COOH group is coordinated with Cu 2+ , while the characteristic peak of −OH moves from 3430 to 3422 cm −1 , indicating that the −OH group is involved in adsorbing Cu 2+ . 251 Ionic liquids (ILs) and GO membranes have been proposed for the CO 2 /CH 4 gas separation method. CO 2 /CH 4 dynamical properties and interactions in 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF 4 ]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Bmim][TF 2 N]), and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]-[PF 6 ]) have been reported.…”

Section: Computational Studiesmentioning

confidence: 99%

“…As revealed by systematic adsorption studies, Sr-G/M possesses denser slit-shaped pores, causing an effective 97.1% Cu(II) removal efficiency. In Figure (a), the peaks of 1421 and 1600 cm –1 shift to 1423 and 1602 cm –1 , suggesting that the −COOH group is coordinated with Cu 2+ , while the characteristic peak of −OH moves from 3430 to 3422 cm –1 , indicating that the −OH group is involved in adsorbing Cu 2+ …”

Section: Computational Studiesmentioning

confidence: 99%

“…(a) FTIR spectra of Sr-G/M before and after adsorption. (b) Full XPS spectra of Sr-G/M before and after adsorption . Copyright@2022, Elsevier Ltd., Journal of Hazardous Materials.…”

Section: Computational Studiesmentioning

confidence: 99%

“…In Figure 42 (a), the peaks of 1421 and 1600 cm –1 shift to 1423 and 1602 cm –1 , suggesting that the −COOH group is coordinated with Cu 2+ , while the characteristic peak of −OH moves from 3430 to 3422 cm –1 , indicating that the −OH group is involved in adsorbing Cu 2+ . 268 …”

Section: Computational Studiesmentioning

confidence: 99%

“…(b) Full XPS spectra of Sr-G/M before and after adsorption. 268 Copyright@2022, Elsevier Ltd., Journal of Hazardous Materials.…”

Section: Computational Studiesmentioning

confidence: 99%

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An Update on Graphene Oxide: Applications and Toxicity

et al. 2022

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Graphene oxide (GO) has attracted much attention in the past few years because of its interesting and promising electrical, thermal, mechanical, and structural properties. These properties can be altered, as GO can be readily functionalized. Brodie synthesized the GO in 1859 by reacting graphite with KClO 3 in the presence of fuming HNO 3 ; the reaction took 3−4 days to complete at 333 K. Since then, various schemes have been developed to reduce the reaction time, increase the yield, and minimize the release of toxic byproducts (NO 2 and N 2 O 4 ). The modified Hummers method has been widely accepted to produce GO in bulk. Due to its versatile characteristics, GO has a wide range of applications in different fields like tissue engineering, photocatalysis, catalysis, and biomedical applications. Its porous structure is considered appropriate for tissue and organ regeneration. Various branches of tissue engineering are being extensively explored, such as bone, neural, dentistry, cartilage, and skin tissue engineering. The band gap of GO can be easily tuned, and therefore it has a wide range of photocatalytic applications as well: the degradation of organic contaminants, hydrogen generation, and CO 2 reduction, etc. GO could be a potential nanocarrier in drug delivery systems, gene delivery, biological sensing, and antibacterial nanocomposites due to its large surface area and high density, as it is highly functionalized with oxygen-containing functional groups. GO or its composites are found to be toxic to various biological species and as also discussed in this review. It has been observed that superoxide dismutase (SOD) and reactive oxygen species (ROS) levels gradually increase over a period after GO is introduced in the biological systems. Hence, GO at specific concentrations is toxic for various species like earthworms, Chironomus riparius, Zebrafish, etc.

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Section: Computational Studiesmentioning

confidence: 99%

Section: Computational Studiesmentioning

confidence: 99%

“…(a) FTIR spectra of Sr-G/M before and after adsorption. (b) Full XPS spectra of Sr-G/M before and after adsorption . Copyright@2022, Elsevier Ltd., Journal of Hazardous Materials.…”

Section: Computational Studiesmentioning

confidence: 99%

Section: Computational Studiesmentioning

confidence: 99%

“…(b) Full XPS spectra of Sr-G/M before and after adsorption. 268 Copyright@2022, Elsevier Ltd., Journal of Hazardous Materials.…”

Section: Computational Studiesmentioning

confidence: 99%

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An Update on Graphene Oxide: Applications and Toxicity

et al. 2022

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Separation of Mono‐/Divalent Ions via Controlled Dynamic Adsorption/Desorption at Polythiophene Coated Carbon Surface with Flow‐Electrode Capacitive Deionization

Xiong,

Ye,

et al. 2024

Small

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Capacitive deionization for selective separation of ions is rarely reported since it relies on the electrostatic attraction of oppositely charged ions with no capability to distinguish ions of different valent states. Using molecular dynamic simulation, a screening process identified a hybrid material known as AC/PTh, which consists of activated carbon with a thin layer of polythiophene (PTh) coating. By utilizing AC/PTh as electrode material implementing the short‐circuit cycle (SCC) mode in flow‐electrode capacitive deionization (FCDI), selective separation of mono‐/divalent ions can be realized via precise control of dynamic adsorption and desorption of mono‐/divalent ions at a particular surface. Specifically, AC/PTh shows strong interaction with divalent ions but weak interaction with monovalent ions, the distribution of divalent ions can be enriched in the electric double layer after a couple of adsorption–desorption cycles. At Cu2+/Na+ molar ratio of 1:40, selectivity toward divalent ions can reach up to 110.3 in FCDI SCC mode at 1.0 V. This work presents a promising strategy for separating ions of different valence states in a continuously operated FCDI device.

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Rheological study of hybrid aqueous suspension of TEMPO-oxidized cellulose nanofibrils and graphene oxide

Malnarič,

Krajnc,

Šebenik

2024

Cellulose

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The incorporation of graphene oxide (GO) into a nanocellulose matrix has attracted considerable attention due to the unique advantages of both components. This study focuses on investigating the viscoelastic and flow properties of hybrid aqueous suspensions (2.00 w/v%), composed of TEMPO-oxidized cellulose nanofibrils (TOCNF) and GO at different TOCNF/GO weight ratios. To adjust the elastic properties of the hybrid suspensions, calcium ions are introduced, varying the concentration systematically to study their effects on the hybrid network structure. All blends exhibit shear-thinning behaviour and demonstrate elastic, gel-like properties. Notably, in the absence of calcium ions, the enhancement of elastic properties is more pronounced at higher GO fractions. Conversely, with the introduction of calcium ions, the enhancement of elastic properties becomes particularly important at higher TOCNF fractions. For the quantitative evaluation of these enhancements, we employ the logarithmic mixing rule. Significant positive deviations from the predictions of the logarithmic mixing rule are ascribed to the complex, concentration-dependent arrangement of cellulose nanofibrils and GO liquid crystals in the aqueous suspension, coupled with ionic crosslinking induced by calcium ions. The study aims to contribute to the understanding of the rheological behaviour of the TOCNF/GO hydrogel, showing potential advancements in various applications. Graphical abstract

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High efficiency and selective removal of Cu(Ⅱ) via regulating the pore size of graphene oxide/montmorillonite composite aerogel

Cited by 44 publications

References 62 publications

An Update on Graphene Oxide: Applications and Toxicity

An Update on Graphene Oxide: Applications and Toxicity

Separation of Mono‐/Divalent Ions via Controlled Dynamic Adsorption/Desorption at Polythiophene Coated Carbon Surface with Flow‐Electrode Capacitive Deionization

Rheological study of hybrid aqueous suspension of TEMPO-oxidized cellulose nanofibrils and graphene oxide

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