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Journal of Sol-Gel Science and Technology
Erschienen in: Journal of Sol-Gel Science and Technology 3/2019

16.11.2018 | Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Synthesis and characterization of CuZnO@GO nanocomposites and their enhanced antibacterial activity with visible light

verfasst von: Xufei Li, Yangli Che, Yan Lv, Fang Liu, Yongqiang Wang, Chaocheng Zhao, Chunshuang Liu

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2019

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Abstract

Copper and zinc composite oxide (CuZnO) was synthesized successfully via a sol–gel method and modified by silane coupling agent to prepare CuZnO@graphene oxide (CuZnO@GO) nanocomposites, with CuZnO nanoparticles (NPs) distributed on the GO nanosheets. The structural properties of prepared CuZnO@GO nanocomposites were studied by FT-IR and XRD techniques. SEM and TEM analysis showed the spherical morphology of CuZnO NPs with a diameter of 20–40 nm. The optical properties of synthesized products were estimated through UV–Vis DRS and PL spectroscopy, which suggested that CuZnO@GO nanocomposites had a widened absorption range from UV to visible region and a lower photogenerated carrier recombination rate than that of pure CuZnO NPs. The antibacterial mechanism of CuZnO@GO nanocomposites was investigated using gram-negative bacteria Escherichia coli and gram-positive bacteria Staphylococcus aureus as two model microorganisms. The antibacterial properties of CuZnO@GO nanocomposites on mixed bacteria were researched in the cooling water system. The results showed that when adding CuZnO@GO nanocomposites to E. coli or S. aureus suspension, the protein leakage after 20 h was 10.5 times or 8.3 times higher than that in the blank experiment. Furthermore, the antibacterial activity of CuZnO@GO nanocomposites in presence of visible light was found to be significantly enhanced as compared with control. Under visible light irradiation, the antibacterial rate of CuZnO@GO nanocomposites in circulating cooling water reached 99.09% when the mass fraction of GO was 17.5%, and more than 90% of bacteria were inactivated by 100 mg·L−1 CuZnO@GO nanocomposites in 60 min after four recycled runs.
Vorheriger Artikel Low temperature synthesis of nanocrystalline V2O5 using the non-hydrolytic sol–gel method
Nächster Artikel Correction to: Synthesis and characterization of CuZnO@GO nanocomposites and their enhanced antibacterial activity with visible light

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Metadaten
Titel
Synthesis and characterization of CuZnO@GO nanocomposites and their enhanced antibacterial activity with visible light
verfasst von
Xufei Li
Yangli Che
Yan Lv
Fang Liu
Yongqiang Wang
Chaocheng Zhao
Chunshuang Liu
Publikationsdatum
16.11.2018
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2019
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-018-4872-y

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