Efficient separation of dyes using two-dimensional heterogeneous composite membranes

Fengchun Jia; Liu Yang; Liyue Sun; Dehao Yu; Yu Song; Yanxin Wang; Matt J Kipper; Jianguo Tang; Linjun Huang

doi:10.1016/j.watres.2023.120693

Efficient separation of dyes using two-dimensional heterogeneous composite membranes

Water Res. 2023 Dec 1:247:120693. doi: 10.1016/j.watres.2023.120693. Epub 2023 Oct 4.

Authors

Fengchun Jia¹, Liu Yang¹, Liyue Sun¹, Dehao Yu¹, Yu Song¹, Yanxin Wang¹, Matt J Kipper², Jianguo Tang³, Linjun Huang⁴

Affiliations

¹ Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science and Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China.
² Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA.
³ Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science and Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China. Electronic address: tang@qdu.edu.cn.
⁴ Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science and Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China. Electronic address: huanglinjun@qdu.edu.cn.

PMID: 37976627
DOI: 10.1016/j.watres.2023.120693

Abstract

Two-dimensional materials are widely used in membrane separation, but the loose distribution and severe expansion between graphene oxide (GO) nanosheets limit its application. Here, we introduce a two-dimensional MOF material into the GO membrane to enhance its water permeance and separation performance. The MOF/GO composite membrane was prepared by vacuum filtration. The MOF and GO nanosheets were tightly stacked through the π-π effect, and the shortened transmission path and enhanced pore structure greatly improved the water permeance of the composite membrane. The MOF/GO membrane exhibited a high water permeance of 56.94 L m^-2 h^-1 bar^-1. The rejection rates of methylene blue and was as methyl orange dyes were as high as 99.79% and 99.11%, respectively. At increased dye concentration, the rejection rate of methylene blue was still maintained greater than 99%. Dye rejection after 18 h of continuous operation remains above 90%. This work provides new ideas for improving membrane separation materials. The combination of two-dimensional heterogeneous materials can result in synergistic advantages for the development of composite membranes with high water permeance and high rejection rate.

Keywords: GO membrane; MOF; Molecular separation.

MeSH terms

Coloring Agents*
Filtration
Methylene Blue*
Water

Substances

Methylene Blue
graphene oxide
Coloring Agents
Water