Ultra-hydrophilic layered titanate nanosheet-based nanofiltration membrane with ultrafast water transport for low energy consumption desalination

Yao，Fangyi1; Zhang，Wenxiong2; Hu，Dengwei3; Li，Sen4; Kong，Xingang5; Uemura，Shinobu1; Kusunose，Takafumi1; Feng，Qi1

2022-12-15

10.1016/j.desal.2022.116144

DESALINATION   Impact Factor & Quartile

0011-9164

1873-4464

Nanofiltration (NF) membranes have significant applications to solve global water scarcity issues. An ultra-hydrophilic inorganic NF membrane was fabricated using ultra-hydrophilic layered titanate HTiO·nHO nanosheets (HTO-ns), which exhibits high selectivity for desalination and small molecule separations while maintained an ultrafast water transport at low operating pressure. This membrane would be a low-energy consumption NF membrane. To fabricate the HTO-ns membrane, a straightforward technique, namely, the self-adjusting membrane thickness process (SAMTP), was developed by the restacking process of negatively charged HTO-ns with cations on a porous polytetrafluoroethylene (PTFE) substrate. A large-scaled high-quality HTO-ns membrane can be fabricated on a PTFE substrate surface-modified with a silane coupling agent of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane and Cu adsorption. There are two kinds of nanochannels for water transport through the membrane, namely, interlayer nanochannels and nanosheet edges chink nanochannels. The excellent separation performances were contributed by the interlayer nanochannels and Donnan exclusion effect of the negatively charged HTO-ns. The SAMTP technique developed in this study could also be applied simply to fabricate other metal oxide nanosheet membranes, which would open a new avenue to the high-performance ultra-hydrophilic inorganic nanosheet-based membranes for low energy consumption separation processes.

Layered titanate nanosheet Low energy consumption Restacking process Ultra-hydrophilic NF membrane Ultrafast water transport

SCI

English

Others

Japan Society for the Promotion of Science[21K04832];

Engineering ; Water Resources

Engineering, Chemical ; Water Resources

WOS:000877589600004

ELSEVIER

CHEMISTRY

2-s2.0-85139369048

Scopus

1.Department of Advanced Materials Science,Faculty of Engineering and Design,Kagawa University,Takamatsu-shi,2217-20 Hayashi-cho,761-0396,Japan
2.Institute for Solid State Physics,The University of Tokyo,Sayo,Hyogo,679-5148,Japan
3.College of Chemistry and Chemical Engineering,Baoji University of Arts and Sciences,Baoji,1-Hi-Tech Avenue, Shaanxi,721013,China
4.Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Nanshan, 1088 Xueyuan Avenue, Guangdong,518055,China
5.School of Materials Science and Engineering,Shaanxi University of Science and Technology,Xi'an,Weiyang, Shaanxi,710021,China

Yao，Fangyi,Zhang，Wenxiong,Hu，Dengwei,et al. Ultra-hydrophilic layered titanate nanosheet-based nanofiltration membrane with ultrafast water transport for low energy consumption desalination[J]. DESALINATION,2022,544.

Yao，Fangyi.,Zhang，Wenxiong.,Hu，Dengwei.,Li，Sen.,Kong，Xingang.,...&Feng，Qi.(2022).Ultra-hydrophilic layered titanate nanosheet-based nanofiltration membrane with ultrafast water transport for low energy consumption desalination.DESALINATION,544.

Yao，Fangyi,et al."Ultra-hydrophilic layered titanate nanosheet-based nanofiltration membrane with ultrafast water transport for low energy consumption desalination".DESALINATION 544(2022).