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Abstract <p>In this work, hybrid membranes from reduced graphene oxide/graphene oxide (rGO/GO) have been prepared. The membrane material was characterized by thermal gravimetry analysis (TGA), X-Ray diffractometry (XRD) and scanning electron microscopy (SEM) analysis. The effect of the membrane thickness on their flux for organic substances has been analyzed. The increased selectivity of the rGO/GO membrane to 2-propanol–1-butanol pair was found that exceeds the known literature data on GO-based membranes, which opens up the possibility to isolate 1-butanol from the isopropanol–butanol–ethanol (IBE) fermentation broth. It is found that hybrid rGO/GO membranes retain methylene blue and separate a mixture of methylene blue–methyl orange more efficiently than pure GO membranes. The hybrid rGO/GO membrane rejects 85.6% of methylene blue (MB) and passes 100% of methyl orange (MO) from their 1 : 1 mixture, that makes possible separation of these two dyes from each other. The results of this work can be used in organic solvent nanofiltration processes.</p>

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Unusual Properties of Selective Hybrid rGO/GO Membranes

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Shamil Galyaltdinov,
  • Gulfina Safina,
  • Airat Kiiamov,
  • Ayrat M. Dimiev

摘要

Abstract

In this work, hybrid membranes from reduced graphene oxide/graphene oxide (rGO/GO) have been prepared. The membrane material was characterized by thermal gravimetry analysis (TGA), X-Ray diffractometry (XRD) and scanning electron microscopy (SEM) analysis. The effect of the membrane thickness on their flux for organic substances has been analyzed. The increased selectivity of the rGO/GO membrane to 2-propanol–1-butanol pair was found that exceeds the known literature data on GO-based membranes, which opens up the possibility to isolate 1-butanol from the isopropanol–butanol–ethanol (IBE) fermentation broth. It is found that hybrid rGO/GO membranes retain methylene blue and separate a mixture of methylene blue–methyl orange more efficiently than pure GO membranes. The hybrid rGO/GO membrane rejects 85.6% of methylene blue (MB) and passes 100% of methyl orange (MO) from their 1 : 1 mixture, that makes possible separation of these two dyes from each other. The results of this work can be used in organic solvent nanofiltration processes.