Interface-Engineered SiO2@GO Nanohybrids for Enhanced CO2 Separation in Thin-Film Nanocomposite Membranes

IF 6.3 Q1 ENGINEERING, ENVIRONMENTAL

ACS ES&T engineering Pub Date : 2026-08-14 Epub Date: 2026-07-07 DOI:10.1021/acsestengg.6c00197

Debasish Borah, Anuranjit Gogoi, Gauri Hazarika, Saurabh V. Sawake, Sarifa R. Fernandes, Narendra Nath Ghosh, Pravin G. Ingole

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引用次数: 0

Abstract

Membrane-based gas separation has emerged as an energy-efficient and environmentally sustainable approach to mitigating anthropogenic CO₂ emissions. This study focused on the synthesis of a graphene oxide (GO)-grafted APTES-functionalized SiO₂ (f-SiO₂@GO) nanocomposite and its incorporation into thin-film nanocomposite (TFN) membranes for CO₂ gas separation. The synthesized f-SiO₂@GO were incorporated into the polyamide selective layer using an interfacial polymerization method. Physiochemical characterization confirmed the successful functionalization of the nanocomposite and its effective integration into the TFN membrane. Gas separation performance was evaluated using CO₂ and N₂ as feed gases at 25 ± 2 °C and 1 bar. The optimized TFN-2 membranes exhibited the highest CO₂ permeance of 3284.5 GPU and CO₂/N₂ selectivity of 24.5 among the fabricated membranes. The enhanced separation efficiency is attributed to the synergistic interplay between functionalized silica and GO nanosheet. These findings suggest that these functionalized nanocomposites can serve as effective fillers to improve the performance of TFN membranes for CO₂ separation.

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界面工程SiO2@GO纳米杂化物在薄膜纳米复合膜中增强CO2分离

基于膜的气体分离已经成为一种节能且环境可持续的减少人为二氧化碳排放的方法。本研究主要研究氧化石墨烯（GO）接枝aptes功能化SiO2 （f-SiO2@GO）纳米复合材料的合成，并将其掺入薄膜纳米复合材料（TFN）膜中用于CO2气体分离。采用界面聚合的方法将synthesizedf-SiO2@GO加入到聚酰胺选择层中。物理化学表征证实了纳米复合材料的成功功能化及其与TFN膜的有效整合。以CO2和N2为原料气，在25±2℃和1 bar条件下评价气体分离性能。优化后的TFN-2膜的CO2透过率为3284.5 GPU， CO2/N2选择性为24.5。功能化二氧化硅和氧化石墨烯纳米片之间的协同相互作用提高了分离效率。这些发现表明，这些功能化的纳米复合材料可以作为有效的填料来提高TFN膜的CO2分离性能。

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来源期刊

ACS ES&T engineering ENGINEERING, ENVIRONMENTAL-

CiteScore

8.50

自引率

0.00%

发文量

期刊介绍： ACS ES&T Engineering publishes impactful research and review articles across all realms of environmental technology and engineering, employing a rigorous peer-review process. As a specialized journal, it aims to provide an international platform for research and innovation, inviting contributions on materials technologies, processes, data analytics, and engineering systems that can effectively manage, protect, and remediate air, water, and soil quality, as well as treat wastes and recover resources. The journal encourages research that supports informed decision-making within complex engineered systems and is grounded in mechanistic science and analytics, describing intricate environmental engineering systems. It considers papers presenting novel advancements, spanning from laboratory discovery to field-based application. However, case or demonstration studies lacking significant scientific advancements and technological innovations are not within its scope. Contributions containing experimental and/or theoretical methods, rooted in engineering principles and integrated with knowledge from other disciplines, are welcomed.