Layer-Controlled Synthesis of a Silanol-Graphene Oxide Nanosheet Composite Forward Osmosis Membrane by Surface Self-Assembly

doi:10.1021/acs.langmuir.1c00570

	Layer-Controlled Synthesis of a Silanol-Graphene Oxide Nanosheet Composite Forward Osmosis Membrane by Surface Self-Assembly
	Jia, Qibo 1; Li, Yan 1; Liu, Yan 1; Duan, Dongping 1,2
刊名	LANGMUIR
	2021-07-13
卷号	37 期号:27 页码:8095-8106
ISSN号	0743-7463
DOI	10.1021/acs.langmuir.1c00570
英文摘要	More and more two-dimensional materials, such as graphene, are used in water separation membrane synthesis. Among the main influencing factors, surface properties and the interface structure of multilayers are the two crucial factors to the membrane separation performance. In the present paper, a silanol ((SiO3)(x)) and graphene oxide nanosheet composite (GO-(SiO3)(x)) was used to synthesize a skin like forward osmosis (FO) membrane for desalination by a surface layer-by-layer self-assembly method. We tested the separation performance of the FO membranes using DI water and 1.5 M NaCl aqueous solutions as feed and draw solutions, respectively. The results show that the molecular size and particle morphology of (SiO3)(x) grafted onto GO nanosheets play main roles in the water flux of the composite membrane. Based on this property and the self-assembly method, we can control the number of composite layers and the space between the GO nanosheets. Simultaneously, we have introduced a new concept: dilutive "skin layer concentration polarization (SLCP)" and the concentrative external concentration polarization (ECP) effect at the membrane surface are considered. The FO membrane synthesized in the current study exhibits a high level of water flux (above 30 L.m(-2).h(-1)), and the salt retention capacity of the membranes increases as the number of composite layers increases. Thus, in this article, we find a way to create suitable water channels for separation of salt/water in a FO process by controlling the GO-(SiO3)(x) content and size.
资助项目	Youth Program of the National Natural Science Foundation of China[51303183] ; Youth Program of the National Natural Science Foundation of China[51708539]
WOS关键词	REVERSE-OSMOSIS ; WATER
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000674276700005
资助机构	Youth Program of the National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49460]
专题	中国科学院过程工程研究所
通讯作者	Duan, Dongping
作者单位	1.Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jia, Qibo,Li, Yan,Liu, Yan,et al. Layer-Controlled Synthesis of a Silanol-Graphene Oxide Nanosheet Composite Forward Osmosis Membrane by Surface Self-Assembly[J]. LANGMUIR,2021,37(27):8095-8106.
APA	Jia, Qibo,Li, Yan,Liu, Yan,&Duan, Dongping.(2021).Layer-Controlled Synthesis of a Silanol-Graphene Oxide Nanosheet Composite Forward Osmosis Membrane by Surface Self-Assembly.LANGMUIR,37(27),8095-8106.
MLA	Jia, Qibo,et al."Layer-Controlled Synthesis of a Silanol-Graphene Oxide Nanosheet Composite Forward Osmosis Membrane by Surface Self-Assembly".LANGMUIR 37.27(2021):8095-8106.