What does this research mean for the field?

Incorporating Ag@SiO2 into carbon molecular sieving membranes significantly enhances O2 permeability and O2/N2 selectivity, surpassing the 2015 Robeson upper bound through synergistic specific adsorption and pore engineering. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To synthesize ultrapermeable carbon molecular sieving membranes with enhanced oxygen and nitrogen separation by incorporating Ag@SiO2 nanoparticles into polyimide precursors.

September 14, 2026AIChE Journal0 citations

Ag@SiO2 Carbon Molecular Sieving Membranes for Efficient Oxygen and Nitrogen Separation

Synergistic Ag@ SiO 2 enables ultrapermeable carbon molecular sieving membranes for O 2 / N 2 separation

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Authors

ZZZiyi Zhu BZBing Zhang ZGZhanhui Gao

Discussion

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Overview

Experimental study demonstrates ultrapermeable Ag@SiO2 carbon molecular sieving membranes for air separation, highlighting a synergistic strategy exceeding the Robeson upper bound.

Key Points

To synthesize ultrapermeable carbon molecular sieving membranes with enhanced oxygen and nitrogen separation by incorporating Ag@SiO2 nanoparticles into polyimide precursors.
Fabricated carbon molecular sieving membranes by blending Ag@SiO2 nanoparticles into a polyimide precursor through membrane casting followed by pyrolysis.
Assessed thermal stability, microstructural changes, gas adsorption capacity, and gas permeation characteristics across varying nanoparticle loadings, temperatures, and pressures.
The optimal membrane incorporating 0.5 wt% Ag@SiO2 demonstrated an O2 permeability of 1605.6 Barrer and an O2/N2 selectivity of 8.1, surpassing the 2015 Robeson upper bound.
Ag@SiO2 addition substantially improved O2 transport via synergistic Ag-facilitated adsorption and SiO2-driven microstructural pore tuning.
Higher Ag@SiO2 loadings generally increased H2 and CO2 permeabilities with slight reductions in H2/N2 and CO2/N2 selectivities, while higher temperatures and lower pressures favored gas transport.

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Cite This Study

Zhu et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b42d0926e14a848b3b4e https://doi.org/10.1002/aic.70651

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September 14, 2026AIChE Journal0 citations

Ag@SiO2 Carbon Molecular Sieving Membranes for Efficient Oxygen and Nitrogen Separation

Synergistic Ag@ SiO 2 enables ultrapermeable carbon molecular sieving membranes for O 2 / N 2 separation

View Full Paper

Authors

ZZZiyi Zhu BZBing Zhang ZGZhanhui Gao

Discussion

Member takes

Overview

Experimental study demonstrates ultrapermeable Ag@SiO2 carbon molecular sieving membranes for air separation, highlighting a synergistic strategy exceeding the Robeson upper bound.

Key Points

To synthesize ultrapermeable carbon molecular sieving membranes with enhanced oxygen and nitrogen separation by incorporating Ag@SiO2 nanoparticles into polyimide precursors.
Fabricated carbon molecular sieving membranes by blending Ag@SiO2 nanoparticles into a polyimide precursor through membrane casting followed by pyrolysis.
Assessed thermal stability, microstructural changes, gas adsorption capacity, and gas permeation characteristics across varying nanoparticle loadings, temperatures, and pressures.
The optimal membrane incorporating 0.5 wt% Ag@SiO2 demonstrated an O2 permeability of 1605.6 Barrer and an O2/N2 selectivity of 8.1, surpassing the 2015 Robeson upper bound.
Ag@SiO2 addition substantially improved O2 transport via synergistic Ag-facilitated adsorption and SiO2-driven microstructural pore tuning.
Higher Ag@SiO2 loadings generally increased H2 and CO2 permeabilities with slight reductions in H2/N2 and CO2/N2 selectivities, while higher temperatures and lower pressures favored gas transport.

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Helpful

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View Full Paper

Cite This Study

Zhu et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b42d0926e14a848b3b4e https://doi.org/10.1002/aic.70651

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Bookmark

View Full Paper