TY - JOUR
T1 - Stable Graphene Oxide Cross-Linked Membranes for Organic Solvent Nanofiltration
AU - Mahalingam, Dinesh K.
AU - Wang, Shaofei
AU - Nunes, Suzana Pereira
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): URF/1/3441-01-01.
Acknowledgements: The authors thanks King Abdullah University of Science and Technology for the financial support, CRG6 Grant URF/1/3441-01-01.
PY - 2019/10/31
Y1 - 2019/10/31
N2 - Graphene oxide (GO) membranes are well-known materials for water purification, owing to their unique molecular transport and sieving properties. However, one of the factors that limits their use in aqueous and organic solutions for applications in industries and water treatment plants is their tendency to swell, forming an enlarged interlayer spacing that disintegrates its structure. Here we report stable ethylenediamine-cross-linked GO membranes, which can efficiently permeate water and organic solvents and filter organic solutions containing molecular dyes. The prepared membranes with a 150 nm thickness demonstrated high permeance for water and organic solvents and exhibited a rejection >95% for small organic dyes dissolved in methanol. A dead-end filtration device was used to estimate the performance of the membranes, confirming pure water permeance of 14 L m-2 h-1 bar-1. The acetone permeance was 30 L m-2 h-1 bar-1, and the N-methyl-2-pyrrolidone permeance was 5 L m-2 h-1 bar-1. At the same time, the cross linker prevented the disruption of the sheets. The combination of stability, high performance, and simplicity of fabrication make these membranes advantageous for potential application in aqueous and non-aqueous industrial separations.
AB - Graphene oxide (GO) membranes are well-known materials for water purification, owing to their unique molecular transport and sieving properties. However, one of the factors that limits their use in aqueous and organic solutions for applications in industries and water treatment plants is their tendency to swell, forming an enlarged interlayer spacing that disintegrates its structure. Here we report stable ethylenediamine-cross-linked GO membranes, which can efficiently permeate water and organic solvents and filter organic solutions containing molecular dyes. The prepared membranes with a 150 nm thickness demonstrated high permeance for water and organic solvents and exhibited a rejection >95% for small organic dyes dissolved in methanol. A dead-end filtration device was used to estimate the performance of the membranes, confirming pure water permeance of 14 L m-2 h-1 bar-1. The acetone permeance was 30 L m-2 h-1 bar-1, and the N-methyl-2-pyrrolidone permeance was 5 L m-2 h-1 bar-1. At the same time, the cross linker prevented the disruption of the sheets. The combination of stability, high performance, and simplicity of fabrication make these membranes advantageous for potential application in aqueous and non-aqueous industrial separations.
UR - http://hdl.handle.net/10754/660497
UR - https://pubs.acs.org/doi/abs/10.1021/acs.iecr.9b05169
UR - http://www.scopus.com/inward/record.url?scp=85075439637&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.9b05169
DO - 10.1021/acs.iecr.9b05169
M3 - Article
SN - 0888-5885
VL - 58
SP - 23106
EP - 23113
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 51
ER -