ACS Applied Materials & Interfaces 2021, 13 Fabrics with Novel Air–Oil Amphibious, Spontaneous One-Way Water-Transport Capability for Oil/Water Separation. Huanjie Chi, Zhiguang Xu, Zhenzhen Wei, Tao Zhang, Hongxia Wang, Tong Lin, Yan Zhao.The Photocatalysis-Enhanced Membrane with High TiO2 Surface Content for Highly Effective Removal of Cationic Dyes. Yaqi Zhang, Haoran Zhang, Shiwei Tian, Longfei Zhang, Wei Li, Wei Wang, Xuhuan Yan, Na Han, Xingxiang Zhang.Photoredox Catalysis for the Fabrication of Water-Repellent Surfaces with Application for Oil/Water Separation. Yelan Xiao, Shun-Cheung Cheng, Yongyi Feng, Zhen Shi, Zhenjia Huang, Gary Tsui, Clement Manohar Arava, Vellaisamy A.Nanoarchitectonics for Electrospun Membranes with Asymmetric Wettability. Jiwang Chen, Ze-Xian Low, Shasha Feng, Zhaoxiang Zhong, Weihong Xing, Huanting Wang.Materials and Methodologies for Tuning Surface Wettability and Oil/Water Separation Mechanisms. Wetting-Induced Water Promoted Flow on Tunable Liquid–Liquid Interface-Based Nanopore Membrane System. Yadong Wu, Haoyang Ling, Yongchao Qian, Yuhao Hu, Bo Niu, Xiangbin Lin, Xiang-Yu Kong, Lei Jiang, Liping Wen.This article is cited by 73 publications. Furthermore, the Janus membrane exhibits desirable antifouling performance and reusability during usage. The fluxes of the surfactant-free toluene-in-water and water-in-toluene emulsions are up to 6.4 × 10 2 and 9.5 × 10 2 L m –2 h –1, respectively. The separation efficiency is higher than 98% for the separation of the two kinds of emulsions. The prepared Janus membrane exhibits a high water contact angle difference of ∼150° between its two surfaces with maintaining the superior penetrability of the original membrane, which makes it capable to separate both oil-in-water and water-in-oil emulsions with high fluxes and accuracy. In this study, a surface with metastable hydrophobicity is constructed on one side of the chemically stable superhydrophilic TiO membrane by adjusting the hydrophobization depth and the morphology of the hydrophobic layer via a water–oil interfacial grafting. However, it is still challenging to obtain Janus membranes with such properties. The GO/SiO.sub.2 hybrid composite membrane has good hydrophilicity and thermal stability, high water permeance and rejection, and can be developed as a high-performance material for water treatment.Extremely asymmetric wettability, high wetting selectivity, instantaneous superwetting behaviors (low transmembrane resistance), and superior resistance to chemicals and solvents are needed for Janus membranes for switchable oil/water separation. The water permeance of the composite membrane is up to 229.15 L m.sup.-2 h.sup.-1 bar.sup.-1, and the rejection of the rhodamine B dye molecules is as high as 99%.
We also tested the thermal stability by TGA, and hydrophilicity by water contact angle measurements. The composite membrane has a larger surface roughness (R.sub.ms = 9.39). The morphology of the membrane was observed by FESEM and AFM. We prepared GO membranes and GO/SiO.sub.2 composite membranes by vacuum suction filtration. BET porosimetry reveals that the total pore volume of the composite is 2.84 cm.sup.3 g.sup.-1, the specific surface area is 2897 m.sup.2 g.sup.-1, and the average pore diameter is 3.97 nm. The chemistry and structure of these materials are characterized by TEM, FTIR, Raman, and XPS of GO and the GO/SiO.sub.2 composite. We have successfully prepared a graphene oxide/silica (GO/SiO.sub.2) hybrid composite materials by in situ hydrolysis, using tetraethyl orthosilicate (TEOS) as a silicon source in an alkaline environment. The unique structure and properties of graphene and silica make them attractive materials for preparation of nanofiltration membranes for water treatment. The development of new materials for water treatment can reduce the energy required for water treatment, reduce cost, and improve efficiency.
Membrane separation technology is commonly used in water treatment applications. Abstract : Water shortages have become a major problem facing the world today.
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