Biosynthesis of zinc oxide nanoparticles from Azadirachta indica for antibacterial and photocatalytic applications

Bhuyan, Tamanna; Mishra, Krishna Kant; Khanuja, Manika; Prasad, Ram; Varma, Ajit

doi:10.1016/j.mssp.2014.12.053

Cited by 606 publications

(210 citation statements)

References 29 publications

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“…Thus, the antibacterial effect of pure and doped ZnO was more pronounced for Gram-positive bacteria as compared to Gram-negative bacteria, which is in good match with the earlier studies. (Premanathan et al 2011;Raghupathi et al 2011;Bhuyan et al 2015). This is explained on the basis of differences in (i) cell membrane structure, (ii) physiology and metabolic activities of the cell, and (iii) degree of contact of Gram-positive and Gram-negative bacteria (Jung et al 2008).…”

Section: Antibacterial Activitymentioning

confidence: 99%

A comparative study of pure and copper (Cu)-doped ZnO nanorods for antibacterial and photocatalytic applications with their mechanism of action

et al. 2015

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The present study reports the synthesis of pure and Cu-doped ZnO nanorods for antibacterial and photocatalytic applications. The samples were synthesized by simple, low cost mechanical-assisted thermal decomposition process. The synthesized materials were characterized by scanning electron microscopy, UV-Visible spectroscopy, and photoluminescence studies. The antibacterial activity of characterized samples was determined against Gram-positive bacteria such as Staphylococcus aureus and Streptococcus pyogenes and Gram-negative bacteria such as Escherichia coli using shake flask method with respect to time. The significant antibacterial activity was perceived from scanning electron micrographs that clearly revealed bacterial cell lysis resulting in the release of cytoplasmic content followed by cell death. The degradation of methylene blue was used as a model organic dye for photocatalytic activity. The present study demonstrates the superior photocatalytic and antibacterial activity of Cu-doped ZnO nanorods with respect to pure ZnO nanorods.

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Section: Antibacterial Activitymentioning

confidence: 99%

A comparative study of pure and copper (Cu)-doped ZnO nanorods for antibacterial and photocatalytic applications with their mechanism of action

et al. 2015

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“…Ramesh et al [14] have synthesized ZnO-NPs using an aqueous extract of Cassia Auriculata flower. Bhuyan et al [15] have reported green synthesis of ZnO-NPs by utilizing the biocompatible leaves extract of Azadirachta indica of an average size of 9.6-25.5 nm. As per our knowledge till date, we have not found any report available on the use of Terminalia chebula for the synthesis of ZnO-NPs.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of zinc oxide nano-sized spherical particles using Terminalia chebula fruits extract for their photocatalytic applications

2016

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The present study describes the green synthesis of ZnO nano-sized spherical particles (ZnO-NPs) using aqueous fruits extract of Terminalia chebula. The Structural, morphological and optical properties of green-synthesized ZnO-NPs are characterized by X-ray diffraction, Fourier transform infrared, field emission-scanning electron microscope, ultraviolet-visible and photoluminescence spectroscopy techniques. The results show that the synthesized nanoparticles have stable hexagonal wurtzite structure, and roughly spherical in shape. To explore the photocatalytic activity of the ZnO-NPs the photocatalytic degradation of rhodamine B (RhB) dye is investigated. The results reveal that ZnO-NPs prepared through green synthesis route are found to be efficient in the degradation of RhB dye.

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“…The peaks 1655 and 1543 cm −1 were corresponded to the amine (N-H) group of proteins or enzymes present in the B. tomentosa leaf extract. The absorption peaks observed in the lower wavenumbers 400-600 cm −1 confirmed the presence of Zn-O bond in the synthesized NPs [21]. The peaks at 448 and 406 cm −1 were corresponded to the stretching frequency …”

Section: Ftir Analysismentioning

confidence: 52%

Fabrication of hollow particles composed of silica containing gadolinium compound and magnetic resonance imaging using them

et al. 2013

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A facile, eco-friendly synthesis of zinc oxide nanoparticles (ZnO NPs) employing Bauhinia tomentosa leaf extract as bioreducing agent was reported. The green-synthesized ZnO NPs were characterized by UV-Vis, TEM, EDX, XRD, and FTIR analyses. The formation of ZnO NPs was confirmed by the appearance of characteristic SPR peak at 370 nm due to the collective oscillation of electrons in the conduction band in UV-Vis spectra. The hexagonal morphology exhibiting nanosized ZnO was observed from the TEM and XRD analyses. The chemical bonds present in the as-synthesized ZnO NPs were identified by FTIR analysis. ZnO NPs showed a significant antibacterial activity against Gram-negative bacteria P. aeruginosa and E. coli than Gram-positive bacteria. Results of this study demonstrated that B. tomentosa leaf extract containing phytochemicals such as alkaloids, terpenoids, flavonoids, tannins, carbohydrates, and sterols possess bioreducing property for ZnO synthesis and the obtained ZnO NPs could be employed effectively as a better bactericidal agent for biological applications. Graphical abstract

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Biosynthesis of zinc oxide nanoparticles from Azadirachta indica for antibacterial and photocatalytic applications

Cited by 606 publications

References 29 publications

A comparative study of pure and copper (Cu)-doped ZnO nanorods for antibacterial and photocatalytic applications with their mechanism of action

A comparative study of pure and copper (Cu)-doped ZnO nanorods for antibacterial and photocatalytic applications with their mechanism of action

Green synthesis of zinc oxide nano-sized spherical particles using Terminalia chebula fruits extract for their photocatalytic applications

Fabrication of hollow particles composed of silica containing gadolinium compound and magnetic resonance imaging using them

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