Synthesis of Sub-10 nm Two-Dimensional Covalent Organic Thin Film with Sharp Molecular Sieving Nanofiltration
Type
ArticleKAUST Department
Advanced Membranes and Porous Materials Research CenterChemical Engineering Program
KAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
KAUST Grant Number
FCC/1/1972-19-01Date
2018-04-05Online Publication Date
2018-04-05Print Publication Date
2018-04-18Permanent link to this record
http://hdl.handle.net/10754/627417
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Show full item recordAbstract
We demonstrated here a novel and facile synthesis of two-dimensional (2D) covalent organic thin film with pore size around 1.5 nm using a planar, amphiphilic and substituted heptacyclic truxene based triamine and a simple dialdehyde as building blocks by dynamic imine bond formation at the air/water interface using Langmuir–Blodgett (LB) method. Optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM), all unanimously showed the formation of large, molecularly thin and free-standing membrane that can be easily transferred on different substrate surfaces. The 2D membrane supported on a porous polysulfone showed a rejection rate of 64 and 71% for NaCl and MgSO4, respectively, and a clear molecular sieving at molecular size around 1.3 nm, which demonstrated a great potential in the application of pretreatment of seawater desalination and separation of organic molecules.Citation
Gadwal I, Sheng G, Thankamony RL, Liu Y, Li H, et al. (2018) Synthesis of Sub-10 nm Two-Dimensional Covalent Organic Thin Film with Sharp Molecular Sieving Nanofiltration. ACS Applied Materials & Interfaces. Available: http://dx.doi.org/10.1021/acsami.7b19450.Sponsors
We acknowledge the support from the KAUST center competitive fund FCC/1/1972-19-01.Publisher
American Chemical Society (ACS)PubMed ID
29620857Additional Links
https://pubs.acs.org/doi/10.1021/acsami.7b19450ae974a485f413a2113503eed53cd6c53
10.1021/acsami.7b19450
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