Effect of cations on stabilizing graphene oxide membranes in aqueous solutions

doi:10.1016/j.apsusc.2019.05.184

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Effect of cations on stabilizing graphene oxide membranes in aqueous solutions
	Zhao, HG ; Yang, J ; Li, Z ; Geng, YY ; He, SH ; Chen, MM ; Li, RF ; Li, QN ; Zhang, L
刊名	APPLIED SURFACE SCIENCE
	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
内容类型	期刊论文
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.