Precisely regulated in-plane pore sizes of Co-MOF nanosheet membranes for efficient dye recovery

Wang, Li1,2; Zhang, Meng1; Shu, Yufei1; Han, Qi1; Chen, Beizhao1; Liu, Bei1; Wang, Zhongying1; Tang, Chuyang Y.2

2023-12-01

10.1016/j.desal.2023.116979

DESALINATION   Impact Factor & Quartile

0011-9164

1873-4464

Nanofiltration (NF) is widely used to treat highly saline textile waters, but its efficiency in dye recovery is limited by low permeance. This study presents a novel class of Co-based metal-organic framework (Co-MOF) nanosheet membranes for efficient and selective dye recovery. The Co-MOF membranes have precisely regulated in-plane pore sizes and exhibit superior permeance and selectivity compared to non-porous nanosheet membranes. By adjusting the length of the ligand, the in-plane pore size was precisely tuned from 1.01 x 0.63 to 1.43 x 0.64 nm2. The Co-MOF membranes exhibited high selectivity for salts over dye in both diffusion and pressure-driven filtration modes, along with excellent and tunable pure water permeance and high rejection of the dye OII. The remarkable permeability and selectivity of the Co-MOF membranes were attributed to the in-plane pores on the nanosheets, which serve as extra fast "lifts" for water and salts while exhibiting high rejection to the dye molecules. Long-term filtration performance and Co leaching tests demonstrated the stability of the Co-MOF membranes, making them promising candidates for practical dye recovery applications. Overall, this work provides a new approach for the development of high-performance membranes for textile wastewater treatment.

2D Co-MOF Porous nanosheet Layer -stacked membrane Dye recovery High permeance

SCI

English

First ; Corresponding

National Natural Science Foundation of China[22076075] ; Stable Support Plan Program of Shenzhen Natural Science Fund[20200925155303001] ; Shenzhen Science and Technology Innovation Commission[JCYJ20220818100218039]

Engineering ; Water Resources

Engineering, Chemical ; Water Resources

WOS:001079856100001

ELSEVIER

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
2.Univ Hong Kong, Dept Civil Engn, Pokfulam, Hong Kong, Peoples R China

Wang, Li,Zhang, Meng,Shu, Yufei,et al. Precisely regulated in-plane pore sizes of Co-MOF nanosheet membranes for efficient dye recovery[J]. DESALINATION,2023,567.

Wang, Li.,Zhang, Meng.,Shu, Yufei.,Han, Qi.,Chen, Beizhao.,...&Tang, Chuyang Y..(2023).Precisely regulated in-plane pore sizes of Co-MOF nanosheet membranes for efficient dye recovery.DESALINATION,567.

Wang, Li,et al."Precisely regulated in-plane pore sizes of Co-MOF nanosheet membranes for efficient dye recovery".DESALINATION 567(2023).