High-flux nanofiltration membranes tailored by bio-inspired co-deposition of hydrophilic g-C3N4 nanosheets for enhanced selectivity towards organics and salts

Ye, Wenyuan1; Liu, Hongwei1; Lin, Fang2; Lin, Jiuyang2; Zhao, Shuaifei3; Yang, Shishi4; Hou, Jingwei5; Zhou, Shungui1; Van der Bruggen, Bart6

2019-10

10.1039/c9en00692c

Environmental Science-Nano   影响因子和分区

2051-8153

2051-8161

Surface modification with advanced nanomaterials (i.e., 2D nanosheets) can be used to strategically tailor membrane properties, providing improved solute permselectivity to targeted molecules. In particular, 2D graphite-like carbon nitride (g-C3N4) nanosheets are a promising alternative for membrane modification, due to their exceptional physicochemical properties and facile synthesis. Herein, high-flux nanofiltration (NF) membranes were designed using bio-inspired co-deposition of hydrophilic g-C3N4 nanosheets with a polydopamine (PDA)/polyethylenimine (PEI) layer onto porous ultrafiltration (UF) substrates. The g-C3N4 nanosheets created additional nanochannels in the PDA/PEI layer to facilitate water molecule transport, resulting in high permeability (28.4 +/- 1.2 L m(-2) h(-1) bar(-1)). Particularly, the bio-inspired layer structure was tailored from the UF to the NF (592 Da) scale by incorporating g-C3N4 nanosheets, thereby breaking through the permeability-selectivity trade-off effect. The tailored NF membrane enabled ultrahigh retention of three reactive dyes (610-630 Da, >99.3%) and low salt rejection (2.9% for NaCl; 7.6% for Na2SO4), significantly promoting the fractionation of dyes and salts for dye desalination. Additionally, the hydrophilic g-C3N4 nanosheets with oxygen plasma treatment further enhanced the wettability of the membrane surfaces, resulting in a superior antifouling performance. This study indicates the promise of g-C3N4 nanosheets to engineer high-flux NF membranes with desirable fractionation performance for sustainable treatment of highly saline wastewater.

SCI ; EI

英语

其他

Fujian Agriculture and Forestry University Program for Distinguished Young Scholar[xjq201704]

Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics

Chemistry, Multidisciplinary ; Environmental Sciences ; Nanoscience & Nanotechnology

WOS:000489724400020

ROYAL SOC CHEMISTRY

20194307571261

Biomimetics ; Carbon nitride ; Deposition ; Desalination ; Economic and social effects ; Hydrophilicity ; Molecules ; Nanofiltration ; Nanosheets ; Physicochemical properties ; Plasma applications ; Sodium chloride ; Sodium sulfate ; Wastewater treatment

Water Treatment Techniques:445.1 ; Industrial Wastes Treatment and Disposal:452.4 ; Biotechnology:461.8 ; Nanotechnology:761 ; Chemical Plants and Equipment:802.1 ; Chemical Operations:802.3 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3 ; Plasma Physics:932.3 ; Solid State Physics:933 ; Crystalline Solids:933.1 ; Social Sciences:971

Web of Science

1.Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China
2.Fuzhou Univ, Sch Environm & Resources, Fujian Prov Engn Res Ctr Rural Waste Recycling Te, Fuzhou 350116, Fujian, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Pollutant Convers, Xiamen 361021, Fujian, Peoples R China
5.Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia
6.Katholieke Univ Leuven, Dept Chem Engn, Celestijnenlaan 200F, B-3001 Leuven, Belgium

Ye, Wenyuan,Liu, Hongwei,Lin, Fang,et al. High-flux nanofiltration membranes tailored by bio-inspired co-deposition of hydrophilic g-C3N4 nanosheets for enhanced selectivity towards organics and salts[J]. Environmental Science-Nano,2019,6(10):2958-2967.

Ye, Wenyuan.,Liu, Hongwei.,Lin, Fang.,Lin, Jiuyang.,Zhao, Shuaifei.,...&Van der Bruggen, Bart.(2019).High-flux nanofiltration membranes tailored by bio-inspired co-deposition of hydrophilic g-C3N4 nanosheets for enhanced selectivity towards organics and salts.Environmental Science-Nano,6(10),2958-2967.

Ye, Wenyuan,et al."High-flux nanofiltration membranes tailored by bio-inspired co-deposition of hydrophilic g-C3N4 nanosheets for enhanced selectivity towards organics and salts".Environmental Science-Nano 6.10(2019):2958-2967.