3D self assembled graphene based cellulose acetate mixed matrix membranes for CO2/CH4 separation: An investigation

IF 11.6 2区材料科学 Q1 CHEMISTRY, PHYSICAL Carbon Pub Date : 2025-03-20 Epub Date: 2025-02-10 DOI:10.1016/j.carbon.2025.120082

Bharat Nayak, Bhanu Vardhan Reddy Kuncharam

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Abstract

This study investigates the development of three-dimensional (3D) Self-Assembled Graphene (SAG) and its potential as a filler material in mixed matrix membranes (MMMs) for efficient CO₂ separation. SAG was synthesized via a one-step hydrothermal treatment of graphene oxide (GO). Additionally, reduced graphene oxide (rGO) was synthesized via chemical reduction of GO and tested alongside SAG and GO as filler materials in cellulose acetate (CA) based MMMs. Structural and gas separation properties of SAG, rGO, and GO-based MMMs were compared to identify the superior material for CO₂ separation applications. Model biogas 40 % CO₂ and 60 % CH₄ is used for gas permeation testing. Characterization techniques such as X-ray Photoelectron Spectroscopy (XPS), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, and X-ray Diffraction (XRD) were employed to evaluate the structural and thermal properties of the fillers and membranes. Gas permeation studies revealed that MMMs containing SAG exhibited superior CO₂ separation performance compared to rGO and GO-based membranes. The 1 % SAG/CA MMMs showed highest CO₂ permeability of 50.96 Barrers which is approximately 364 % higher than pure CA membrane, 178 % higher than GO based MMMs, and 133 % higher than rGO based MMMs.

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三维自组装石墨烯基醋酸纤维素混合基质膜用于CO2/CH4分离的研究

本研究探讨了三维（3D）自组装石墨烯（SAG）的发展及其作为混合基质膜（MMMs）中有效分离CO₂的填充材料的潜力。采用一步水热法对氧化石墨烯（GO）进行合成。此外，通过氧化石墨烯的化学还原合成了还原性氧化石墨烯（rGO），并与SAG和GO作为填充材料在醋酸纤维素（CA）基mm中进行了测试。比较了SAG、rGO和go基mm材料的结构和气体分离性能，以确定CO₂分离应用的最佳材料。模型沼气采用40% CO2和60% CH4进行气体渗透试验。采用x射线光电子能谱（XPS）、差示扫描量热法（DSC）、傅里叶变换红外光谱（FTIR）、拉曼光谱（Raman Spectroscopy）和x射线衍射（XRD）等表征技术对填料和膜的结构和热性能进行了评价。气体渗透研究表明，与还原氧化石墨烯和氧化石墨烯基膜相比，含SAG的MMMs具有更好的CO₂分离性能。1% SAG/CA的MMMs显示出最高的CO2渗透率为50.96 barers，比纯CA膜高约364%，比氧化石墨烯基MMMs高178%，比氧化石墨烯基MMMs高133%。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.