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Journal of Sol-Gel Science and Technology
Published 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

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

Published in: Journal of Sol-Gel Science and Technology | Issue 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.
previous article Low temperature synthesis of nanocrystalline V2O5 using the non-hydrolytic sol–gel method
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Metadata
Title
Synthesis and characterization of CuZnO@GO nanocomposites and their enhanced antibacterial activity with visible light
Authors
Xufei Li
Yangli Che
Yan Lv
Fang Liu
Yongqiang Wang
Chaocheng Zhao
Chunshuang Liu
Publication date
16-11-2018
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 3/2019
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-018-4872-y

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