Superior adsorption of 3D nanoporous architectures for Ni(<scp>ii</scp>) ions adsorption using polyvinyl alcohol as cross-linking agent and adsorption conveyor

Wang, Haibo; Wang, Wei; Zhao, Yufen; Xu, Zhiwei; Chen, Lei; Zhao, Lihuan; Xu, Tongwen; Sun, Wanying

doi:10.1039/c8ra00113h

Cited by 16 publications

(3 citation statements)

References 26 publications

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“…The improvement of the performance of TFN is caused by the increased tortuosity of the polymer matrix and the introduction of rapid diffusion channels triggered by the doping of rigid GO lamellae. GO/TFN displays the potential for separating CO 2 [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO₂ and N₂ Separation from Blast Furnace Gas

Jiang

Meng

et al. 2020

Journal of Nanomaterials

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A novel molecular sieve membrane was synthesized using graphene oxide/single-walled carbon nanotubes (GO/SWCNTs). The composite was characterized by transmission electron microscopy, field emission scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller-specific surface area analyzers. The results revealed that laminar GO was interwoven with tubular SWCNTs and the carbon nanotubes were attached onto the surface of GO or interspersed among GO to form a three-dimensional structure. Moreover, the interlayer spacing of GO/SWCNTs increased to 0.826 nm. On condition that the inlet pressure of N2 was 0.10 MPa and the temperature was 323 K, the N2 permeability of GO/SWCNTs was 1595 Barrer. With increasing temperature, the N2 permeability decreased while it increased with the inlet pressure. When the inlet pressure of CO was 0.10 MPa and the temperature was 323 K, the CO permeability was 109 Barrer. At the temperature of 323 K, the selectivities of N2/CO and CO2/CO were 32.8 and 37, respectively. These results indicated that GO/SWCNTs may be a promising molecular sieve for gas separation.

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Section: Introductionmentioning

confidence: 99%

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO₂ and N₂ Separation from Blast Furnace Gas

Jiang

Meng

et al. 2020

Journal of Nanomaterials

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“…Several water treatment technologies, such as chemical precipitation, ion exchange, membrane separation, flocculation, and adsorption, have been used to eliminate Ni(II) ions from water [6][7][8][9][10][11]; however, none of them are perfect.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of adsorptive removal of Ni(II) by treated waste granular-activated carbon and new granular-activated carbon

Wang¹,

Wang²,

Xu³

et al. 2019

DWT

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Granular-activated carbon is a commonly used adsorbent in water treatment. It can be reused by regeneration when saturated, but there are limits to the number of regenerations in actual engineering. This study created a simple and economical treatment method allowing for the reuse of waste granular-activated carbon (WGAC) that approaches the regeneration limit. The adsorption kinetics, equilibrium, and thermodynamics of Ni(II) onto the treated waste granular-activated carbon (TWGAC) and the new granular-activated carbon (NGAC) were studied. The N 2 adsorption/ desorption isotherms, zeta potential, SEM, energy-dispersive spectrometry and FTIR spectra were used to characterize and compare the NGAC and TWGAC. Analysis revealed that the structure of WGAC was severely damaged, but the adsorption capacity and adsorption mechanism after treatment were similar to those of NGAC. Experimental data showed that the pseudo-second-order kinetic model and the Freundlich isothermal model had high correlation coefficients (R 2 > 0.99). The maximum adsorption capacity of TWGAC and NGAC was 138.9 and 123.5 mg g-1. Thermodynamic parameters, including the negative values ΔG, positive values ΔH, and positive value ΔS, indicated that the current adsorption processes of TWGAC and NGAC were feasible, spontaneous and endothermic. After three cycles, TWGAC's removal rate for Ni(II) remained as high as 95.3%.

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“…Phenol can also severely impair multiple organs in the human body. When organisms contact with low-dose phenol for a long time, it is likely to induce carcinogenesis and lead to other harms such as malformation of organs [8]. So, we choose the Pb 2+ and phenol as the research project.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Temperatures on the Synergistic Effect between a Magnetic Field and Functionalized Graphene Oxide-Carbon Nanotube Composite for Pb²⁺ and Phenol Adsorption

Jiang

Pei

et al. 2018

Journal of Nanomaterials

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The effect of temperature on scale inhibition and adsorption properties for Pb2+ and phenol was studied under the synergistic effect of the magnetic field and the adsorbent. The sulfhydryl and amino-modified graphene oxide/oxidized multiwalled carbon nanotubes (NH2-SH-GO/o-MWCNTs) were synthesized and applied as the adsorbent. Additionally, changes in pH, conductivity, molecular activation energy, the relative variation of intramolecular energy and the relative variation in the proportion of free water, and adsorption capacity of the adsorbent were studied under different temperatures of circulating water. The relative variation of the proportion of free water increased with the increasing temperatures. The above results indicated that higher temperature would be detrimental to scale inhibition. The higher the temperatures, the lower the intramolecular energies. And the more stable molecules are formed in the circulating water. Thus, the results reduced the tendency to scale formation. The increased temperatures promoted the adsorption capacity of the adsorbent for Pb2+ and phenol. The adsorption process for Pb2+ and phenol conformed to the pseudo-second-order kinetic model and Freundlich isotherm model under the synergistic effect of magnetic field and NH2-SH-GO/MWCNTs. After five cycles, the adsorption capacities of the adsorbent for Pb2+ and phenol separately decreased by 59.86% and 76.36%. The aforementioned results reveal that temperatures can promote the adsorption process for Pb2+ and phenol, and the synergistic effect between magnetic field and the adsorbent has a potential application for water treatment.

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Superior adsorption of 3D nanoporous architectures for Ni(ii) ions adsorption using polyvinyl alcohol as cross-linking agent and adsorption conveyor

Abstract: In this study, we report a large-scale and low cost approach for the synthesis of three-dimensional (3D) polyvinyl alcohol/carbon nanotubes nanoporous architecture using self-assembly method.

Cited by 16 publications

References 26 publications

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO₂ and N₂ Separation from Blast Furnace Gas

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO₂ and N₂ Separation from Blast Furnace Gas

Performance evaluation of adsorptive removal of Ni(II) by treated waste granular-activated carbon and new granular-activated carbon

The Effect of Temperatures on the Synergistic Effect between a Magnetic Field and Functionalized Graphene Oxide-Carbon Nanotube Composite for Pb²⁺ and Phenol Adsorption

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Superior adsorption of 3D nanoporous architectures for Ni(ii) ions adsorption using polyvinyl alcohol as cross-linking agent and adsorption conveyor

Abstract: In this study, we report a large-scale and low cost approach for the synthesis of three-dimensional (3D) polyvinyl alcohol/carbon nanotubes nanoporous architecture using self-assembly method.

Cited by 16 publications

References 26 publications

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO2 and N2 Separation from Blast Furnace Gas

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO2 and N2 Separation from Blast Furnace Gas

Performance evaluation of adsorptive removal of Ni(II) by treated waste granular-activated carbon and new granular-activated carbon

The Effect of Temperatures on the Synergistic Effect between a Magnetic Field and Functionalized Graphene Oxide-Carbon Nanotube Composite for Pb2+ and Phenol Adsorption

Contact Info

Product

Resources

About

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO₂ and N₂ Separation from Blast Furnace Gas

Graphene Oxide/Single-Walled Carbon Nanotube Membranes for CO₂ and N₂ Separation from Blast Furnace Gas

The Effect of Temperatures on the Synergistic Effect between a Magnetic Field and Functionalized Graphene Oxide-Carbon Nanotube Composite for Pb²⁺ and Phenol Adsorption