• 文献标题:   Effective cross-linking strategy for graphene oxide membrane with high structural stability and enhanced separation performance
  • 文献类型:   Article
  • 作  者:   ZHANG HT, HU XB, YANG BS, ZHOU QT
  • 作者关键词:   graphene oxide membrane, crosslinking, structural stability, separation performance, water treatment
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484 EI 1361-6528
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1088/1361-6528/acc111
  • 出版年:   2023

▎ 摘  要

In order to solve the poor structural stability of graphene oxide (GO) membrane, a facile and effective cross-linking technology was employed to create a high-performance GO membrane. Herein, DL-Tyrosine/amidinothiourea and (3-Aminopropyl) triethoxysilane were used to crosslink GO nanosheets and porous alumina substrate, respectively. The group evolution of GO with different cross-linking agents was detected via Fourier transform infrared spectroscopy. Ultrasonic treatment and soaking experiment were conducted to explore the structural stability of the different membranes. The GO membrane cross-linked with amidinothiourea exhibits exceptional structural stability. Meanwhile, the membrane has superior separation performance, with the pure water flux reaching approximately 109.6 l center dot m(-2)center dot h(-1)center dot bar(-1). During the treatment of 0.1 g l(-1) NaCl solution, its permeation flux and rejection for NaCl are about 86.8 l center dot m(-2)center dot h(-1)center dot bar(-1) and 50.8%, respectively. The long-term filtration experiment also demonstrates that the membrane exhibits great operational stability. All these indicate the cross-linking graphene oxide membrane has promising potential applications in water treatment.