Gradient-Pore-Engineered Janus Membranes for Sequential Molecular Sieving in Membrane Desalination DOI
Zhigao Zhu,

Maoquan Yuan,

Miao He

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 22, 2025

Membrane distillation (MD) holds significant promise for desalinating hypersaline wastewater but faces challenges in simultaneously rejecting both nonvolatile and volatile pollutants. Herein, we introduce a thermo-osmosis-evaporation (TOE) system utilizing asymmetric Janus membranes with gradient pores sequential molecular sieving, which achieved by sequentially vacuum filtering mixture of m-phenylenediamine (MPD) graphene oxide (GO) nanosheets onto hydrophobic electrospun poly(vinylidene fluoride) (PVDF) fibrous membrane, followed interfacial polymerization to form an ultrathin polyamide (PA) layer. The role the MPD-GO interlayer modulating structural properties selective transport behavior PA layer PA@MPD-GO configuration was systematically investigated. Results reveal that MPD effectively intercalates between layers GO nanosheets, significantly reducing mass transfer resistance water within membrane. Furthermore, present on membrane surface acts as monomer source polymerization, enabling formation ∼9 nm thick. optimized high flux 63 L m-2 h-1 at flow rate 480 mL min-1 under temperature 40 °C, 97.55% rejection phenylamine, while also demonstrating exceptional antifouling, antiwetting, antiscaling properties. This design offers promising approach advancing thermal desalination technologies treating complex scenarios.

Language: Английский

Heterostructured MXene/COF nanofiltration membranes: Synergistic enhancement via interlayer spacing and penetrating pores DOI
Jie Gao, Li‐Bo Huang, Xianghao Meng

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 133212 - 133212

Published: April 1, 2025

Language: Английский

Citations

0
Gradient-Pore-Engineered Janus Membranes for Sequential Molecular Sieving in Membrane Desalination DOI
Zhigao Zhu,

Maoquan Yuan,

Miao He

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 22, 2025

Membrane distillation (MD) holds significant promise for desalinating hypersaline wastewater but faces challenges in simultaneously rejecting both nonvolatile and volatile pollutants. Herein, we introduce a thermo-osmosis-evaporation (TOE) system utilizing asymmetric Janus membranes with gradient pores sequential molecular sieving, which achieved by sequentially vacuum filtering mixture of m-phenylenediamine (MPD) graphene oxide (GO) nanosheets onto hydrophobic electrospun poly(vinylidene fluoride) (PVDF) fibrous membrane, followed interfacial polymerization to form an ultrathin polyamide (PA) layer. The role the MPD-GO interlayer modulating structural properties selective transport behavior PA layer PA@MPD-GO configuration was systematically investigated. Results reveal that MPD effectively intercalates between layers GO nanosheets, significantly reducing mass transfer resistance water within membrane. Furthermore, present on membrane surface acts as monomer source polymerization, enabling formation ∼9 nm thick. optimized high flux 63 L m-2 h-1 at flow rate 480 mL min-1 under temperature 40 °C, 97.55% rejection phenylamine, while also demonstrating exceptional antifouling, antiwetting, antiscaling properties. This design offers promising approach advancing thermal desalination technologies treating complex scenarios.

Language: Английский

Citations

0