Multilayered graphene oxide membrane with precisely controlled interlayer spacing for separation of molecules with very close molecular weights

Zheng, Jingxian; Wang, Rui; Ye, Qisheng; Chen, Baoliang; Zhu, Xiaoying

doi:10.1016/j.memsci.2022.120678

Cited by 12 publications

(3 citation statements)

References 49 publications

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“…For example, Muslimova et al utilized AFM to test the elastic modulus of a synthetic membrane used for water–oil separation . Zheng et al in situ evaluated mechanical strength of their prepared MGMs in water through nanoindentation by AFM . Powell et al conducted membrane indentation studies using silica colloid probes to obtain the Young’s modulus of the membrane.…”

Section: Application Of Afm In the Research Of Membrane Separationmentioning

confidence: 99%

“…314 Zheng et al in situ evaluated mechanical strength of their prepared MGMs in water through nanoindentation by AFM. 315 Powell et al conducted membrane indentation studies using silica colloid probes to obtain the Young's modulus of the membrane. Additionally, they examined the variations in Young's modulus under different pH conditions.…”

Section: Acs Esandt Engineeringmentioning

confidence: 99%

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Applications of AFM in Membrane Characterization and Fouling Analysis

Liu,

Zhu,

Chen

et al. 2024

ACS EST Eng.

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Atomic force microscopy (AFM), as a type of scanning probe microscopy (SPM), possesses formidable capabilities for nanoscale imaging and force spectroscopy. Due to its advantages such as high resolution, nondestructive detection, minimal environmental restrictions, strong versatility, and real-time in situ analysis, AFM has become an indispensable tool in surface science and materials research, finding extensive applications in the study of the membrane separation and fouling processes. The tremendous advantages of AFM in characterization applications stem from its diverse tip functionalization techniques. This review encompasses the preparation of AFM probe tips and the modification techniques of special tips, including carbon nanotube (CNT) probes, metal nanowire probes, colloidal probes, and single-cell/molecule probes. Furthermore, it highlights the applications and advancements of AFM and probe modification techniques in membrane technology research. With the continuous development of tip modification techniques, the analytical capabilities of AFM will be further expanded, promising broader prospects for its application in the study of membrane fouling mechanisms and the development of antifouling membrane materials.

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Section: Application Of Afm In the Research Of Membrane Separationmentioning

confidence: 99%

Section: Acs Esandt Engineeringmentioning

confidence: 99%

Applications of AFM in Membrane Characterization and Fouling Analysis

Liu,

Zhu,

Chen

et al. 2024

ACS EST Eng.

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“…It is reported that their inherent transport channels can be regulated for selective permeation at the sub-nanometer scale [17]. For instance, by adjusting ultraviolet irradiation, the interlayer spacing of GO membrane was precisely controlled by Zheng et al to improve the separation efficiency of these two species with a very low molecular weight difference [18]. Our previous work also showed that the 1,4-phenylenediamine-2-sulfonate (PDASA)-functionalized GO channels facilitated the adsorption of the polar molecule (i.e., water), and then largely promoted its permeation [19].…”

Section: Introductionmentioning

confidence: 99%

Functionalized GO Membranes for Efficient Separation of Acid Gases from Natural Gas: A Computational Mechanistic Understanding

et al. 2022

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Membrane separation technology is applied in natural gas processing, while a high-performance membrane is highly in demand. This paper considers the bright future of functionalized graphene oxide (GO) membranes in acid gas removal from natural gas. By molecular simulations, the adsorption and diffusion behaviors of several unary gases (N2, CH4, CO2, H2S, and SO2) are explored in the 1,4-phenylenediamine-2-sulfonate (PDASA)-doped GO channels. Molecular insights show that the multilayer adsorption of acid gases evaluates well by the Redlich-Peterson model. A tiny amount of PDASA promotes the solubility coefficient of CO2 and H2S, respectively, up to 4.5 and 5.3 mmol·g−1·kPa−1, nearly 2.5 times higher than those of a pure GO membrane, which is due to the improved binding affinity, great isosteric heat, and hydrogen bonds, while N2 and CH4 only show single-layer adsorption with solubility coefficients lower than 0.002 mmol·g−1·kPa−1, and their weak adsorption is insusceptible to PDASA. Although acid gas diffusivity in GO channels is inhibited below 20 × 10−6 cm2·s−1 by PDASA, the solubility coefficient of acid gases is certainly high enough to ensure their separation efficiency. As a result, the permeabilities (P) of acid gases and their selectivities (α) over CH4 are simultaneously improved (PCO2 = 7265.5 Barrer, αCO2/CH4 = 95.7; P(H2S+CO2) = 42075.1 Barrer, αH2S/CH4= 243.8), which outperforms most of the ever-reported membranes. This theoretical study gives a mechanistic understanding of acid gas separation and provides a unique design strategy to develop high-performance GO membranes toward efficient natural gas processing.

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Constructing 2D ultrathin graphene oxide membranes with supramolecular-assembled nano-adhesives for enhancing water stability

Liu

et al. 2023

Nano Res.

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Multilayered graphene oxide membrane with precisely controlled interlayer spacing for separation of molecules with very close molecular weights

Cited by 12 publications

References 49 publications

Applications of AFM in Membrane Characterization and Fouling Analysis

Applications of AFM in Membrane Characterization and Fouling Analysis

Functionalized GO Membranes for Efficient Separation of Acid Gases from Natural Gas: A Computational Mechanistic Understanding

Constructing 2D ultrathin graphene oxide membranes with supramolecular-assembled nano-adhesives for enhancing water stability

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