Manara - Qatar Research Repository
1-s2.0-S235248472202011X-main.pdf (1.14 MB)

Reduced graphene aerogels as energy efficient selective oil sorbents

Download (1.14 MB)
journal contribution
submitted on 2023-11-13, 07:41 and posted on 2023-11-13, 08:16 authored by Junaid Saleem, Moghal Zubair Khalid Baig, Usman Bin Shahid, Said Mansour, Gordon McKay

Graphene aerogels are widely used in the oil–water system as they possess high internal surface area and super-oleophilic properties. However, they tend to absorb water along with oil, and to overcome this problem; surface coatings are generally employed using expensive fluoro-silane compounds. It leads to an increase in production costs and environmental concerns. Herein, we report super-hydrophobic 3D graphene aerogels as selective oil sorbent for oil–water​ separation. The reduction of oxygen-containing functional groups on the surface of graphene aerogels has been studied and characterized with FTIR. The thermal treatment of up to 700 °C was carried out using an in-house flow system. The gases used to reduce graphene oxide aerogel are H2 and N2 with an optimized ratio of 5:95. The presence of H2 significantly decreased the oxygen-containing functional groups in graphene aerogel. The increase in the C/O ratio results in higher uptake capacity due to higher surface area and pore volume. The thermal reduction yields a C/O ratio of 24:1, slightly higher than most reported values.

Other Information

Published in: Energy Reports
See article on publisher's website:


Open Access funding provided by the Qatar National Library



  • English



Publication Year

  • 2022

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License

Institution affiliated with

  • Hamad Bin Khalifa University
  • College of Science and Engineering - HBKU
  • Qatar Environment and Energy Research Institute - HBKU
  • Qatar University
  • Center for Advanced Materials - QU