Effect of cations on stabilizing graphene oxide membranes in aqueous solutions
文献类型：期刊论文
| 作者 | Zhao, HG; Yang, J; Li, Z; Geng, YY; He, SH; Chen, MM; Li, RF; Li, QN; Zhang, L |
| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2019 |
| 卷号 | 487页码:962-971 |
| 关键词 | RADIOACTIVE-WASTE MANAGEMENT WATER PERMEATION EXTRACTION SEPARATION TRANSPORT ORIGIN FORCES |
| ISSN号 | 0169-4332 |
| DOI | 10.1016/j.apsusc.2019.05.184 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Owing to the unique layer structures and efficient water transport, graphene oxide membranes (GOMs) have shown great promise in molecular and ion separation. In the above application fields, the stability of GOMs in aqueous solutions is the most essential requirement. In this paper, vortex shaking experiments and XRD characterization were carried out to test and illustrate the stability of GOMs in different solutions. Normally, when dry GOMs were immersed in aqueous solutions, the water molecules could rapidly enter layer space and enlarge the interlayer spacings (d-spacings), thus reducing the stability of GOMs in aqueous solutions. However, it was also found that the ions in aqueous solutions could play a positive role in restraining the d-spacings and stabilizing the GOMs. For monovalent cations (for example, H+ and Na+), high concentrations were required to guarantee the good stability of GOMs, which could be explained by the theory of electrostatic double layer. In contrast, low concentrations of divalent or trivalent cations (for example, Sr2+, UO22+ and Eu3+) could also efficiently crosslink the graphene oxide sheets, thus enhancing the stability of GOMs. Based on these results, to ensure the stability in practical application, a method of modifying original GOMs by 1 mM Eu3+ was proposed and verified by sucrose and metal ions permeation experiments. The results indicated that the modified GOMs could keep stable and be qualified to achieve selective separation. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32033]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, CAS Ctr Excellence TMSR Energy Syst, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, HG,Yang, J,Li, Z,et al. Effect of cations on stabilizing graphene oxide membranes in aqueous solutions[J]. APPLIED SURFACE SCIENCE,2019,487:962-971. |
| APA | Zhao, HG.,Yang, J.,Li, Z.,Geng, YY.,He, SH.,...&Zhang, L.(2019).Effect of cations on stabilizing graphene oxide membranes in aqueous solutions.APPLIED SURFACE SCIENCE,487,962-971. |
| MLA | Zhao, HG,et al."Effect of cations on stabilizing graphene oxide membranes in aqueous solutions".APPLIED SURFACE SCIENCE 487(2019):962-971. |
入库方式： OAI收割
来源：上海应用物理研究所
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