TY - JOUR
T1 - Functionalized three-dimensional graphene sponges for highly efficient crude and diesel oil adsorption
AU - Bagoole, Oscar
AU - Rahman, Md Mahfuzur
AU - Shah, Sohail
AU - Hong, Haiping
AU - Chen, Hang
AU - Al Ghaferi, Amal
AU - Younes, Hammad
N1 - Funding Information:
Acknowledgments The authors gratefully acknowledge the financial assistance provided by the Masdar Institute of Science and Technology. The authors would also like to thank the entire team of the Masdar Institute Microscopy Suite for their contribution and support.
Publisher Copyright:
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - Modified Hummer’s method has been used in this study to synthesize graphene oxide (GO) solution that was utilized for the fabrication of three-dimensional (3D) graphene sponges and their subsequent functionalization through a low-cost and facile vapor-based surface enhancement approach. The functionalized 3D-graphene sponge is an excellent absorbent, which can remove more than 3300 wt.% of crude oil (calculated with respect to the original sorbent mass). The functionalization of the obtained graphene sponges with trichloro (1H,1H,2H,2H-perfluorooctyl)silane enhanced their wettability properties due to the super-hydrophobic nature of the resulting materials characterized by the contact angles in water greater than 150°. Furthermore, their elastic compression modulus (estimated by conducting a series of compression tests) was about 22.3 kPa. The equilibrium modeling of the oil removal process, which was performed by plotting Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherms, confirmed the properties of the fabricated 3D graphene sponges as exceptional absorbents for crude and diesel oil, which could be attributed to the oleophilic nature of graphene. Moreover, the obtained 3D graphene sponges could be regenerated via heat treatment, which was conducted to release the adsorbed species. After five adsorption-desorption cycles, the sorption capacity of the produced 3D graphene sponges towards crude oil reached 95% of the initial value.
AB - Modified Hummer’s method has been used in this study to synthesize graphene oxide (GO) solution that was utilized for the fabrication of three-dimensional (3D) graphene sponges and their subsequent functionalization through a low-cost and facile vapor-based surface enhancement approach. The functionalized 3D-graphene sponge is an excellent absorbent, which can remove more than 3300 wt.% of crude oil (calculated with respect to the original sorbent mass). The functionalization of the obtained graphene sponges with trichloro (1H,1H,2H,2H-perfluorooctyl)silane enhanced their wettability properties due to the super-hydrophobic nature of the resulting materials characterized by the contact angles in water greater than 150°. Furthermore, their elastic compression modulus (estimated by conducting a series of compression tests) was about 22.3 kPa. The equilibrium modeling of the oil removal process, which was performed by plotting Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherms, confirmed the properties of the fabricated 3D graphene sponges as exceptional absorbents for crude and diesel oil, which could be attributed to the oleophilic nature of graphene. Moreover, the obtained 3D graphene sponges could be regenerated via heat treatment, which was conducted to release the adsorbed species. After five adsorption-desorption cycles, the sorption capacity of the produced 3D graphene sponges towards crude oil reached 95% of the initial value.
KW - Graphene oxide
KW - Hydrophobic surface
KW - Silanization
KW - Three-dimensional graphene
UR - http://www.scopus.com/inward/record.url?scp=85047953581&partnerID=8YFLogxK
U2 - 10.1007/s11356-018-2248-z
DO - 10.1007/s11356-018-2248-z
M3 - Article
C2 - 29860688
AN - SCOPUS:85047953581
SN - 0944-1344
VL - 25
SP - 23091
EP - 23105
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 23
ER -