Hierarchical Porous Structured SiO2/SnO2 Nanofibrous Membrane with Superb Flexibility for Molecular Filtration
Filtration (mathematics)
Nanofiltration
Permeance
DOI:
10.1021/acsami.7b04518
Publication Date:
2017-05-16T13:57:36Z
AUTHORS (6)
ABSTRACT
The separation and purification of chemical molecules from organic media under harsh environments are vital importance in the fields water treatment, biomedical engineering, recycling. Herein, we report preparation a flexible SiO2/SnO2 nanofibrous membrane (SiO2/SnO2 NFM) with high surface area hierarchical porous structure by selecting poly(vinyl butyral) as pore-forming agent embedding crystalline phase into amorphous matrix without using surfactant sacrificial template. Benefiting uniform micropore size on fibers negatively charged properties, membranes exhibit precise selectivity toward based electrostatic interaction exclusion, which could separate molecule mixtures same charges different molecular sizes efficiency more than 97%. Furthermore, highly tortuous open-porous structures porosity give rise to permeate flux 288 000 L m-2 h-1. In addition, also displays excellent stability can be reused for ten consecutive filtration-regeneration cycles. integration filtration efficiency, large flux, good reutilization, easy industrialization provides NFM potential applications practical science.
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