Pillared and Reduced Graphene Oxide Membranes for Organic Solvent Nanofiltration

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2025-09-11 DOI:10.1021/acs.iecr.5c01758

Natechanok Yutthasaksunthorn, , , Kaung Su Khin Zaw, , , Scott A. Sinquefield, , and , Sankar Nair*,

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Abstract

This work demonstrates the capability of pillared and reduced graphene oxide (GO) membranes to perform organic solvent nanofiltration (OSN) in diverse nonpolar and polar solvents. The effects of pillaring by polyconjugated aromatic compounds (PACs) on solvent flux and molecular weight cutoffs (MWCOs) are investigated. Pyranine/solvent green 7 (SG) and toluidine blue O (TBO) were used as pillaring agents, followed by chemical reduction with hydriodic acid. This fabrication process yielded membranes with a stable cross-flow operation in both polar and nonpolar solvents. Pillared and reduced membranes (rSG-GO and rTBO-GO) exhibited 2-fold higher permeances in nonpolar solvents (C₆–C₁₀ alkanes and aromatics) compared to nonpillared membranes, while maintaining MWCOs of 500–600 Da in toluene. The membranes broadly followed a trend of higher permeance with decreasing solvent viscosity but with nuanced deviations based on membrane–solvent interactions. Reducing the thickness to ∼70 nm further enhanced permeance while maintaining rejection of larger solutes.

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柱状和还原氧化石墨烯膜用于有机溶剂纳滤

这项工作证明了柱状和还原氧化石墨烯（GO）膜在各种非极性和极性溶剂中进行有机溶剂纳滤（OSN）的能力。研究了多共轭芳香族化合物（PACs）柱化对溶剂通量和分子量截断值（MWCOs）的影响。以吡啶/溶剂绿7 （SG）和甲苯胺蓝O （TBO）为支撑剂，用氢氧酸进行化学还原。该工艺制备的膜在极性和非极性溶剂中都具有稳定的横流操作。柱状膜和还原膜（rSG-GO和rTBO-GO）在非极性溶剂（C6-C10烷烃和芳烃）中的渗透率比非柱状膜高2倍，同时在甲苯中保持500-600 Da的mwco。随着溶剂粘度的降低，膜的渗透率总体呈较高的趋势，但由于膜与溶剂的相互作用，膜的渗透率存在细微的偏差。将厚度降低到~ 70 nm进一步增强了渗透，同时保持了对较大溶质的排斥。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.