Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 3, Pages 2594-2605Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b15873
Keywords
nanofiltration; IRMOF-3/GO; polydopamine; rejection; water cleaning
Funding
- National Natural Science Foundation of China (NSFC) [21276051]
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A new metal-organic framework/graphene oxide composite (IRMOF-3/GO) with high adsorption capacity of copper(II) (maximal adsorption amount = 254.14 mg/g at pH 5.0 and 25 degrees C) was prepared. Novel and highly efficient nanofiltration (NF) membrane can be facilely fabricated via surface decoration of IRMOF-3/GO onto polydopamine (PDA)-coated polysulfone (PSF) substrate. After decoration of IRMOF-3/GO, membrane surface potential increased from 6.7 to 13.1 mV at pH 5.0 and 25 C. Due to the adsorption effect of IRMOF-3/GO and the enhancement of membrane surface potential, the prepared NF membrane (the loading amount of IRMOF-3/GO is ca. 13.6 g/m(2)) exhibits a highly efficient rejection of copper(II). The copper(II) rejection reaches up to similar to 90%, while maintaining a relatively high flux of similar to 31 L/m(2)/h at the pressure of 0.7 MPa and pH 5.0. Moreover, the membrane also presents an outstanding stability throughout the 2000 min NF testing period. Thus, the newly developed NF membrane shows a promising potential for water cleaning. This work provides a worthy reference for designing highly efficient NF membranes modified by metal organic framework (MOP) relevant materials.
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