点击次数：

论文类型：期刊论文

发表时间：2018-12-14

发表刊物：JOURNAL OF MATERIALS CHEMISTRY A

收录刊物：SCIE

卷号：6

期号：46

页面范围：23502-23512

ISSN号：2050-7488

摘要：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.