Surface charge and hydrophilicity improvement of graphene membranes via modification of pore surface oxygen-containing groups to enhance permeability and selectivity

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Surface charge and hydrophilicity improvement of graphene membranes via modification of pore surface oxygen-containing groups to enhance permeability and selectivity
	Sun, Jingqiu ; Hu, Chengzhi ; Liu, Zhongtao ; Liu, Huijuan ; Qu, Jiuhui
刊名	CARBON
	2019-04
卷号	145 页码:140-148
ISSN号	0008-6223
英文摘要	Graphene is a promising material in membrane separation. However, high water permeability as well as high rejection against contaminants is still demanded yet challenging for graphene-based membranes fabrication. In this work, we synthesized an oxygen-containing group-modified reduced graphene oxide membrane (O-rGOM), which was designed by substituting the surface layers of rGO membranes with GO flakes. The number of oxygen-containing groups on membrane surface was modulated by the [GO]/[rGO] ratio during the construction of O-rGOM. Results demonstrated that a [GO]/[rGO] ratio of 1: 4 was optimal, with oxygen-containing groups modifying the pore surface of rGO laminates effectively. Furthermore, the O-rGOM showed improved hydrophilicity and water permeability. In addition, modification of the oxygen-containing groups promoted the zeta potential around the membrane pore, resulting in enhanced electrostatic interaction between the membrane and charged contaminants. The O-rGOM structure exhibited 18.2% and 5.2% improvement in acid orange 7 and methylene blue rejection, respectively, as well as similar to 2.6 times enhancement in water permeability compared with the rGOM. This work provides a feasible approach for the design of graphene-based membranes to improve filtration performance with enhanced water permeability. (c) 2019 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43120]
专题	生态环境研究中心_环境水质学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jingqiu,Hu, Chengzhi,Liu, Zhongtao,et al. Surface charge and hydrophilicity improvement of graphene membranes via modification of pore surface oxygen-containing groups to enhance permeability and selectivity[J]. CARBON,2019,145:140-148.
APA	Sun, Jingqiu,Hu, Chengzhi,Liu, Zhongtao,Liu, Huijuan,&Qu, Jiuhui.(2019).Surface charge and hydrophilicity improvement of graphene membranes via modification of pore surface oxygen-containing groups to enhance permeability and selectivity.CARBON,145,140-148.
MLA	Sun, Jingqiu,et al."Surface charge and hydrophilicity improvement of graphene membranes via modification of pore surface oxygen-containing groups to enhance permeability and selectivity".CARBON 145(2019):140-148.