Graphene Oxide Nanofiltration Membranes Containing Silver Nanoparticles: Tuning Separation Efficiency via Nanoparticle Size

Nanomaterials
Kun YangJian-Guo Tang

Abstract

Three types of graphene oxide/silver nanoparticles (GO/AgNPs) composite membranes were prepared to investigate size-effect of AgNPs on nanofiltration ability. The size of AgNPs was 8, 20, and 33 nm, which was characterized by UV-visible spectroscopy and transmission electron microscopy. The morphology and structure of GO and GO/AgNPs composite membranes were characterized by atomic force microscopy, scanning electron microscopy, and X-ray diffraction. The filtration performance of membranes were evaluated on a dead-end filtration device. When the size of AgNPs is 20 nm, the GO/AgNPs composite membrane has the highest water flux (106.1 L m-2 h-1 bar-1) and rejection of Rhodamine B (RhB) (97.73%) among three types of composite membranes. The effect of feed concentration of dye solution and the flux of common solvent was also investigated. The mechanism was discussed, which demonstrated that both interlaying spacing and defect size influence the filtration ability of membrane, which is instructive to future study.

References

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May 20, 2015·Chemical Society Reviews·Gongping LiuNanping Xu
Jan 8, 2016·Nature·Zhiyong Jason Ren, Art K Umble
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Sep 21, 2015·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xu ChenJie Liu

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Citations

May 24, 2020·Nanomaterials·Georgios FytianosGeorge Z Kyzas
Nov 18, 2020·Nanomaterials·Alessandro PedicoAndrea Lamberti

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Methods Mentioned

BETA
infrared spectroscopy
scanning electron microscopy
transmission electron microscopy
X-ray
surface enhanced Raman scattering
AFM

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