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. 2020 Jan 20;12(1):29.
doi: 10.1007/s40820-019-0357-y.

Biosynthesis of Flower-Shaped CuO Nanostructures and Their Photocatalytic and Antibacterial Activities

Hafsa Siddiqui  1 , M S Qureshi  2 , Fozia Zia Haque  2
Affiliations

Biosynthesis of Flower-Shaped CuO Nanostructures and Their Photocatalytic and Antibacterial Activities

Hafsa Siddiqui et al. Nanomicro Lett. .

Abstract

Copper oxide nanoflowers (CuO-NFs) have been synthesized through a novel green route using Tulsi leaves-extracted eugenol (4-allyl-2-methoxyphenol) as reducing agent. Characterizations results reveal the growth of crystalline single-phase CuO-NFs with monoclinic structure. The prepared CuO-NFs can effectively degrade methylene blue with 90% efficiency. They also show strong barrier against E. coli (27 ± 2 mm) at the concentration of 100 µg mL-1, while at the concentration of 25 µg mL-1 weak barrier has been found against all examined bacterial organisms. The results provide important evidence that CuO-NFs have sustainable performance in methylene blue degradation as well as bacterial organisms.

Keywords: Antibacterial; Biosynthesis; Copper oxide; Eugenol; O. Sanctum; Photocatalysis.

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Figures

Fig. 1
Fig. 1
a, b Tentative mechanism of crystal growth through copper–eugenol complex process. c FESEM images of eugenol-assisted CuO nanoflowers with different magnifications. d EDX spectrum. e TEM image, and f SAED pattern of eugenol-assisted CuO nanoflowers. (Color figure online)
Fig. 2
Fig. 2
a Rietveld refinement of the XRD pattern and b Raman spectrum of eugenol-assisted CuO nanoflowers with the high-resolution fitted XPS spectrum of c Cu 2p and d O 1s. (Color figure online)
Fig. 3
Fig. 3
a UV–vis absorption spectrum of MB dye, b spectral variation of MB dye in different time intervals, c photocatalytic degradation of MB dye under the irradiation of light over eugenol-assisted CuO nanoflowers. d First-order kinetic plot of ln(C0/C) versus time for the degradation of MB dye. (Color figure online)
Fig. 4
Fig. 4
Comparison of antibacterial activity of eugenol-assisted CuO nanoflowers against Pseudomonas fluorescens, E. coli, and S. aureus using well agar diffusion process. (Color figure online)
See this image and copyright information in PMC

References

    1. Zoolfakar S, Rani RA, Morfa AJ, O’Mullane AP, Kalantar-zadeh K. Nanostructured copper oxide semiconductors: a perspective on materials, synthesis methods and applications. J. Mater. Chem. C. 2014;2:5247–5270. doi: 10.1039/C4TC00345D. - DOI
    1. Siddiqui H, Qureshi MS, Haque FZ. Hexamine (HMT) assisted wet chemically synthesized CuO nanostructures with controlled morphology and adjustable optical behavior. Opt. Quant. Electron. 2016;48(7):349. doi: 10.1007/s11082-016-0618-7. - DOI
    1. Senthilkumar V, Kim YS, Chandrasekaran S, Rajagopalan B, Kim EJ, Chung JS. Comparative supercapacitance performance of CuO nanostructures for energy storage device applications. RSC Adv. 2015;5:20545–20553. doi: 10.1039/C5RA00035A. - DOI
    1. Zhang Q, Zhang K, Xu D, Yang G, Huang H, Nie F, Liu C, Yang S. CuO nanostructures: synthesis, characterization, growth mechanisms, fundamental properties, and applications. Prog. Mater Sci. 2014;60:208–337. doi: 10.1016/j.pmatsci.2013.09.003. - DOI
    1. Zhang J, Feng H, Qin Q, Zhang G, Cui Y, Chai Z, Zheng W. Interior design of three-dimensional CuO ordered architectures with enhanced performance for supercapacitors. J. Mater. Chem. A. 2016;4:6357–6367. doi: 10.1039/C6TA00397D. - DOI

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