Hierarchical Porous Structured SiO2 /SnO2 Nanofibrous Membrane with Superb Flexibility for Molecular Filtration

ACS Applied Materials & Interfaces
Haoru ShanBin Ding

Abstract

The separation and purification of chemical molecules from organic media under harsh chemical environments are of vital importance in the fields of water treatment, biomedical engineering, and organic recycling. Herein, we report the preparation of a flexible SiO2/SnO2 nanofibrous membrane (SiO2/SnO2 NFM) with high surface area and hierarchical porous structure by selecting poly(vinyl butyral) as pore-forming agent and embedding crystalline phase into amorphous matrix without using surfactant as sacrificial template. Benefiting from the uniform micropore size on the fibers and negatively charged properties, the membranes exhibit a precise selectivity toward molecules based on electrostatic interaction and size exclusion, which could separate organic molecule mixtures with the same electrostatic charges and different molecular sizes with a high efficiency of more than 97%. Furthermore, the highly tortuous open-porous structures and high porosity give rise to a high permeate flux of 288 000 L m-2 h-1. In addition, the membrane also displays excellent stability and can be reused for ten consecutive filtration-regeneration cycles. The integration of high filtration efficiency, large permeate flux, good reutilization, and easy to in...Continue Reading

References

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Citations

Feb 7, 2019·Macromolecular Rapid Communications·Xi YuBin Ding
Nov 2, 2019·Environmental Science and Pollution Research International·Ebrahim MoradiAli Akbar Asgharinezhad
Apr 16, 2018·Macromolecular Rapid Communications·Qiuxia FuBin Ding
Apr 21, 2021·ACS Applied Materials & Interfaces·Enshuang ZhangHao Zhang
Mar 13, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Kejia JiXuesong Jiang
Apr 29, 2020·ACS Central Science·Darryl FongTimothy M Swager

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