Nanotech 2014
June 15-19, 2014 Washington, D.C.
Topics: Sustainable Nanomanufacturing, Nanoscale Materials Characterization, NanoFab: Manufacturing & Instrumentation, Modeling, Simulation & Informatics, Carbon Nano Structures & Devices, Graphene, Nanoparticle Synthesis & Applications, Polymer Nanotechnology, Nanomaterials for Catalysis, Nanoelectronics, MEMS & NEMS Devices & Applications, Bio Nano Materials, etc.
Web: http://www.techconnectworld.com/Nanotech2014/
SCIENTIFIC NEWS
Ultrathin, molecular-sieving graphene oxide membranes for selective hydrogen separation
Ultrathin, molecular-sieving membranes have great potential to realize high-flux, high-selectivity mixture separation at low energy cost. Current microporous membranes [pore size < 1 nm], however, are usually relatively thick. With the use of current membrane materials and techniques, it is difficult to prepare microporous membranes thinner than 20 nm without introducing extra defects. In a recent paper H.Li et al., Science 342, 95 (2013) ultrathin graphene oxide (GO) membranes, with thickness approaching 1.8 nm were prepared by a facile filtration process. These membranes showed mixture separation selectivities as high as 3400 and 900 for H2/CO2 and H2/N2 mixtures, respectively, through selective structural defects on GO.
Single-gas permeation through GO membranes supported on porous anodic aluminum oxide at 20°C.
