Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 241, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2020.116738
Keywords
Graphene oxide membrane; Interlayer spacing; Ions rejection; Mono-/multi-valent ions separation
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Funding
- National Natural Science Foundation of China [11974366, 11574339, U1832150]
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Ion sieving is of great importance in a variety of applications, including water purification, bio-medical engineering, resource utilization and environment protection. Despite previous efforts, the separation efficiency for mono-/multi valent ions is still far from satisfactory. Here, we use high concentration of KCl solution to control the interlayer spacings of graphene oxide (GO) membranes. Then, these KCl-controlled GO membranes can precisely sieve mono-/multi-valentions, especially for Na+/Mg2+ separation. The excellent performance of the membranes can be attributed to the narrower interlayer spacings of KCl-controlled GO membranes.
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