期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 40, 页码 27376-27382出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b09912
关键词
graphene oxide; amide bonding; stability; cross-linking; membranes; nanofiltration
资金
- Climate Change Research Hub of KAIST [N01150139]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2015R1A6A3A04057367]
- Leading Foreign Research Institute Recruitment Program through the NRF - Ministry of Education, Science and Technology [NRF-2015K1A4A3047100]
Laminated graphene oxide (GO) has promising use as a membrane because of its high permeance, chemical and mechanical stability, as well as the molecular sieving effect of its interlayers. However, the hydrophilic surface of GO, which is highly decorated with oxygen groups, easily induces delamination of stacked GO films in aqueous media, thereby limiting the practical application. To stabilize GO films in aqueous media, we functionalized a polymer support with branched polyethylene-imine (BPEI). BPEI adsorbed intercalated into the stacked GO sheets via diffusion during filtration. The GO/BPEI membrane obtained exhibits high stability during sonication (>1 h duration, 40 kHz frequency) in water within a broad pH range (2-12). In contrast, the GO film spontaneously delaminated upon sonication. Furthermore, BPEI treatment did not affect the filtration performance of the GO film, as evidenced by the high rejection rates (>90%) for the dye molecules methylene blue, rose bengal, and brilliant blue and by their permeation rates of ca. 124, 34.8, 12.2, and 5.1%, respectively, relative to those of a typical GO membrane.
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