Influence of integrating graphene oxide quantum dots on the fine structure characterization and alcohol dehydration performance of pervaporation composite membrane

Graphene oxide quantum dots, a carbon-based nanomaterial resembling the structure of graphene oxide but with a smaller size of <100 nm, was incorporated in a poly(vinyl alcohol) dense selective layer supported on a polysulfone substrate to prepare a composite hybrid pervaporation membrane for alcohol dehydration

Rumwald Leo G. Lecaros; Khainah M. Deseo; Wei-Song Hung; Lemmuel L. Tayo; Chien-Chieh Hu; Quan-Fu An; Hui-An Tsai; Kueir-Rarn Lee; Juin-Yih Lai

2019

Scholarcy highlights

  • Graphene oxide quantum dots, a carbon-based nanomaterial resembling the structure of graphene oxide but with a smaller size of <100 nm, was incorporated in a poly(vinyl alcohol) dense selective layer supported on a polysulfone substrate to prepare a composite hybrid pervaporation membrane for alcohol dehydration
  • The addition of GOQDs into the PVA polymer matrix provided a tortuous path for the permeating molecules but augments the separation efficiency of the membrane
  • The presence of hydroxyl and carboxyl groups on the confined nanosize of GOQDs sheets attract the polar groups of the permeants within the polymer matrix
  • Positron annihilation lifetime spectroscopy results justified the low separation of the membrane with linear alcohol/water mixtures
  • The long operating time, high operating temperature, and high water content in feed shows the potential stability of the membrane for practical application

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