Graphene Oxide Membrane/Conical Nanoporous Polyimide Composites for Regulating Ion Transport
文献类型：期刊论文
| 作者 | Bian, Yubo1; Dong, Yuhua2,3,4; Liu, Jiande2,4 ; Sun, Youmei2,3; Duan, Jinglai2,3,5; Liu, Jie2,3; Yao, Huijun2,3,5,6
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| 刊名 | ACS APPLIED NANO MATERIALS
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| 出版日期 | 2021-07-23 |
| 卷号 | 4期号:7页码:6964-6973 |
| 关键词 | ionic rectification effect graphene oxide membrane ion irradiation PI membrane ion transport |
| ISSN号 | 2574-0970 |
| DOI | 10.1021/acsanm.1c00997 |
| 通讯作者 | Yao, Huijun(yaohuijun@impcas.ac.cn) |
| 英文摘要 | The ionic rectification effect, an important phenomenon existing in the solid-state nanopore system, has attracted much attention due to its ability to significantly regulate ion transport in the nanopores. However, current research mainly focuses on the single nanopore systems with low ionic currents, and thus further practical applications are limited. In this work, the conical nanoporous polyimide (CNPI) membrane was prepared by ion irradiation and asymmetric chemical etching to increase the ionic current, and the graphene oxide membrane (GOM) was spin-coated on it to improve the corresponding ionic flux and rectification effect after that. It was found that the ionic rectification ratio (0.05 M KCl at 3 V) increased from 17 (CNPI membrane) to 63 (GOM/CNPI composite) with the ionic current in microamperes. The enhanced rectification effect was ascribed to the increased geometry asymmetry and charge asymmetry, which further increased the difference of ionic conductance at opposite bias. Moreover, the corresponding COMSOL simulation revealed that the enhanced ion depletion and enrichment appeared in the nanochannel, especially at the tip side of conical nanopores after the GOM was spin-coated on the CNPI membrane. Finally, it was also confirmed that the GOM/CNPI composite can exhibit a good rectification effect and chemical durability in a wide acidic condition (pH 1 to 6), which extends the practical applications of the conical nanopore in a nanofluidic system. |
| WOS关键词 | CURRENT RECTIFICATION ; MEMBRANES |
| 资助项目 | National Nature Science Foundation of China[11775279] ; National Nature Science Foundation of China[11575261] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000677582900047 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Nature Science Foundation of China |
| 源URL | [http://119.78.100.186/handle/113462/136738]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Yao, Huijun |
| 作者单位 | 1.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Lanzhou Univ, Sch Phys Sci & Technol, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China 5.Adv Energy Sci & Technol Guangdong Lab, Huizhou 516000, Peoples R China 6.Huizhou Res Ctr Ion Sci, Huizhou 516000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bian, Yubo,Dong, Yuhua,Liu, Jiande,et al. Graphene Oxide Membrane/Conical Nanoporous Polyimide Composites for Regulating Ion Transport[J]. ACS APPLIED NANO MATERIALS,2021,4(7):6964-6973. |
| APA | Bian, Yubo.,Dong, Yuhua.,Liu, Jiande.,Sun, Youmei.,Duan, Jinglai.,...&Yao, Huijun.(2021).Graphene Oxide Membrane/Conical Nanoporous Polyimide Composites for Regulating Ion Transport.ACS APPLIED NANO MATERIALS,4(7),6964-6973. |
| MLA | Bian, Yubo,et al."Graphene Oxide Membrane/Conical Nanoporous Polyimide Composites for Regulating Ion Transport".ACS APPLIED NANO MATERIALS 4.7(2021):6964-6973. |
入库方式： OAI收割
来源：近代物理研究所
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