期刊
ADVANCED MATERIALS
卷 30, 期 49, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201804977
关键词
bottom-up synthesis; dialysis and de-salting; nanoporous atomically thin membranes (NATMs); nanoporous graphene membrane; nanoscale pores; selective transport
类别
资金
- Vanderbilt University
- U.S. Department of Energy, Basic Energy Sciences [DE-SC0008059]
- National Science Foundation under NSF [ECS-0335765]
- National Science Foundation [DMR-1419807]
- FATE MURI [9550-15-1-0514]
- U.S. Department of Energy [DE-AC05-00OR22725]
- Department of Energy
- U.S. Department of Energy (DOE) [DE-SC0008059] Funding Source: U.S. Department of Energy (DOE)
Direct synthesis of graphene with well-defined nanoscale pores over large areas can transform the fabrication of nanoporous atomically thin membranes (NATMs) and greatly enhance their potential for practical applications. However, scalable bottom-up synthesis of continuous sheets of nanoporous graphene that maintain integrity over large areas has not been demonstrated. Here, it is shown that a simple reduction in temperature during chemical vapor deposition (CVD) on Cu induces in-situ formation of nanoscale defects (< 2-3 nm) in the graphene lattice, enabling direct and scalable synthesis of nanoporous monolayer graphene. By solution-casting of hierarchically porous polyether sulfone supports on the as-grown nanoporous CVD graphene, large-area (>5 cm(2)) NATMs for dialysis applications are demonstrated. The synthesized NATMs show size-selective diffusive transport and effective separation of small molecules and salts from a model protein, with approximate to 2-100x increase in permeance along with selectivity better than or comparable to state-of-the-art commercially available polymeric dialysis membranes. The membranes constitute the largest fully functional NATMs fabricated via bottom-up nanopore formation, and can be easily scaled up to larger sizes permitted by CVD synthesis. The results highlight synergistic benefits in blending traditional membrane casting with bottom-up pore creation during graphene CVD for advancing NATMs toward practical applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据