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Large area continuous multilayer graphene membrane for water desalination

Chemical Engineering Journal, ISSN: 1385-8947, Vol: 413, Page: 127510
2021
  • 23
    Citations
  • 0
    Usage
  • 35
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    23
    • Citation Indexes
      23
  • Captures
    35

Article Description

This manuscript reports the preparation of a large area (84 cm 2 ) desalination membrane based on multilayers (11 nm thickness) of B,N-codoped defective graphene. The process consists of coating a porous ceramic α-Al 2 O 3 support (100 nm pore size) with a continuous nanometric (50 nm) chitosan film containing adsorbed (NH 4 ) 3 BO 3. Subsequent pyrolysis in the presence of hydrogen converts chitosan into multilayer defective B,N-codoped graphene. The partial removal of B and N dopant atoms by H 2 during the pyrolysis causes the generation of subnanometric pores due to atom vacancy, as determined by control experiments in the absence of this gas. A NaCl and KCl removal efficiency from brackish water higher than 95% for a permeate flux of 24.3 L m −2  h −1 at 10 bars were achieved.

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