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Indexed by:期刊论文

Date of Publication:2018-12-14

Journal:JOURNAL OF MATERIALS CHEMISTRY A

Included Journals:SCIE

Volume:6

Issue:46

Page Number:23502-23512

ISSN No.:2050-7488

Abstract:Based on the Hagen-Poiseuille equation, theoretical membrane permeability is inversely and directly proportional to its thickness and pore-radius, respectively, indicating that a thin membrane with an effective pore-radius is extremely permeable. However, the trade-off between selectivity and permeability restricts their applications for pressure-driven separation membranes. Hence, balancing the contradiction between the permeability and selectivity of a separation membrane is desired in future applications. Herein, we report a superpermeable nanoporous carbon (PC) membrane which offers a separation layer (approximate to 80 nm) and effective pore radius (approximate to 20 nm) by selectively removing parts of carbon atoms, thus greatly decreasing the transport resistance of water molecules through the membrane. The experimental results have shown a water flux of approximate to 8000 L m(-2) h(-1) bar(-1) for the membrane. High selectivity is demonstrated via selective separation of nanoparticles with their narrowly distributed pores. Self-production of H2O2 and self-circulation of Fe2+/Fe3+ was achieved simultaneously on the PC membrane via coupling with electro-Fenton technology, which leads to the in situ production of hydroxyl radicals. The removal efficiencies of organic contaminants (SMX, BPA and phenol) by electro-Fenton driven PC membranes were approximate to 96.3%, approximate to 97.4% and 92.1%, respectively. Given their compatible high permeability and high selectivity, our porous PC membranes might provide an alternative as future membranes and motivate the design of innovative membranes.