Well-structured 3D channels within GO-based membranes enable ultrafast wastewater treatment

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dc.contributor.authorFu, Huaqiang
dc.contributor.authorWang, Zhe
dc.contributor.authorLi, Peng
dc.contributor.authorQian, Wei
dc.contributor.authorZhang, Zixin
dc.contributor.authorZhao, Xin
dc.contributor.authorFeng, Hao
dc.contributor.authorYang, Zhugen
dc.contributor.authorKou, Zongkui
dc.contributor.authorHe, Daping
dc.date.accessioned2022-09-06T14:12:49Z
dc.date.available2022-09-06T14:12:49Z
dc.date.issued2022-09-03
dc.description.abstractGraphene oxide (GO)-based membranes have been widely studied for realizing efficient wastewater treatment, due to their easily functionalizeable surfaces and tunable interlayer structures. However, the irregular structure of water channels within GO-based membrane has largely confined water permeance and prevented the simultaneously improvement of purification performance. Herein, we purposely construct the well-structured three-dimensional (3D) water channels featuring regular and negatively-charged properties in the GO/SiO2 composite membrane via in situ close-packing assembly of SiO2 nanoparticles onto GO nanosheets. Such regular 3D channels can improve the water permeance to a record-high value of 33,431.5 ± 559.9 L·m−2·h−1 (LMH) bar−1, which is several-fold higher than those of current state-of-the-art GO-based membranes. We further demonstrate that benefiting from negative charges on both GO and SiO2, these negatively-charged 3D channels enable the charge selectivity well toward dye in wastewater where the rejection for positive-charged and negative-charged dye molecules is 99.6% vs. 7.2%, respectively. The 3D channels can also accelerate oil/water (O/W) separation process, in which the O/W permeance and oil rejection can reach 19,589.2 ± 1,189.7 LMH bar−1 and 98.2%, respectively. The present work unveils the positive role of well-structured 3D channels on synchronizing the remarkable improvement of both water permeance and purification performance for highly efficient wastewater treatment.en_UK
dc.identifier.citationFu H, Wang Z, Li P, et al., (2023) Well-structured 3D channels within GO-based membranes enable ultrafast wastewater treatment. Nano Research, Volume 16, Issue 2, February 2023, pp. 1826 - 1834en_UK
dc.identifier.issn1998-0124
dc.identifier.urihttps://doi.org/10.1007/s12274-022-4970-6
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/18413
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.subjectgraphene oxideen_UK
dc.subjectmembranesen_UK
dc.subjectwastewater treatmenten_UK
dc.subjectwater channelsen_UK
dc.subjectcharge-selectivityen_UK
dc.titleWell-structured 3D channels within GO-based membranes enable ultrafast wastewater treatmenten_UK
dc.typeArticleen_UK

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