Journal article

Ultrafast, Stable Ionic and Molecular Sieving through Functionalized Boron Nitride Membranes

Cheng Chen, Si Qin, Dan Liu, Jiemin Wang, Guoliang Yang, Yuyu Su, Liangzhu Zhang, Wei Cao, Ming Ma, Yijun Qian, Yuchen Liu, Jefferson Zhe Liu, Weiwei Lei

ACS Applied Materials and Interfaces | American Chemical Society | Published : 2019

Abstract

Porous membranes play an important role in the separation technologies such as gas purification, solute nanofiltration, and desalination. An ideal membrane should be thin to maximize permeation speed, have optimum pore sizes to maximize selectivity, and be stable in various harsh conditions. Here, we show that the nanometer-thick membrane prepared by means of filtration of functionalized boron nitride (FBN) water suspensions can block solutes with hydrated radii larger than 4.3 Å in water. The FBN membranes with abundant nanochannels reduce the path length of ions. As molecular sieves, the FBN membrane can permeate small ions at an ultrahigh rate—a 25-fold enhancement compared with that of i..

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University of Melbourne Researchers