Graphene Oxide Quantum Dots Covalently Functionalized PVDF Membrane with Significantly-Enhanced Bactericidal and Antibiofouling Performances

Scientific Reports
Zhiping ZengTimothy Thatt Yang Tan

Abstract

Covalent bonding of graphene oxide quantum dots (GOQDs) onto amino modified polyvinylidene fluoride (PVDF) membrane has generated a new type of nano-carbon functionalized membrane with significantly enhanced antibacterial and antibiofouling properties. A continuous filtration test using E. coli containing feedwater shows that the relative flux drop over GOQDs modified PVDF is 23%, which is significantly lower than those over pristine PVDF (86%) and GO-sheet modified PVDF (62%) after 10 h of filtration. The presence of GOQD coating layer effectively inactivates E. coli and S. aureus cells, and prevents the biofilm formation on the membrane surface, producing excellent antimicrobial activity and potentially antibiofouling capability, more superior than those of previously reported two-dimensional GO sheets and one-dimensional CNTs modified membranes. The distinctive antimicrobial and antibiofouling performances could be attributed to the unique structure and uniform dispersion of GOQDs, enabling the exposure of a larger fraction of active edges and facilitating the formation of oxidation stress. Furthermore, GOQDs modified membrane possesses satisfying long-term stability and durability due to the strong covalent interaction betw...Continue Reading

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Citations

Jul 30, 2016·ACS Applied Materials & Interfaces·Ankan Dutta Chowdhury, Ruey-An Doong
Nov 20, 2016·Journal of Dental Research·A J Paula, H Koo
Jul 6, 2017·Chemical Society Reviews·Guoke ZhaoHongwei Zhu
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Oct 5, 2018·Environmental Science and Pollution Research International·Arun Kumar ShuklaFekri Abdulraqeb Ahmed Ali
Dec 10, 2020·IScience·Tian Zhang, Pier-Luc Tremblay
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Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Harinash RaoPei Pei Chong
Jun 25, 2021·Nature Communications·Z L ShawSumeet Walia
Jul 20, 2021·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Dong-Hoon ChoiTaewoo Yi
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Methods Mentioned

BETA
transmission electron microscopy
atomic force microscopy
X-ray
scanning electron microscopy
Scanning
Infrared Spectroscopy

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