Biosynthesis of Cobalt Oxide Nanoparticles - A Short Review

David, S. Alwin; Veeraputhiran, V.; Vedhi, C.

doi:10.30799/jnst.s01.19050308

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…Among both calsses of bacteria, minimum zone of inhibition (16.0±0.8) was found for E. coli. The gram positive bacteria have thick peptidoglycan cell wall but porous in nature with higher permiability as compared to gram negative bacteria and such a structure of cell wall facilitates the maximum absorpiton of these NPs [21][22][23]25]. Also, the size of nanoparticles is small which ensures the maximum absorption of NPs by bacterial species and hence resulting into their death.…”

Section: Resultsmentioning

confidence: 99%

“…Gram negative bacteria have thin peptidoglycan wall with less permeability [21][22][23]25]. So based upon the structural characteristics of cell walls of both type of bacteria, we assume an enhanced permeability and hence greater activity of Co 3 O 4 -NPs for gram positive bacteria [21][22][23]25]. Highly reactiive oxygen species (ROS) such as hydogen peroxide formed in the presence of metallic ions, result in a Each value represents the mean ±SEM of four replicates.…”

Section: Resultsmentioning

confidence: 99%

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Green synthesis of cobalt oxide nanoparticles for potential biological applications

Hafeez

Shaheen

Akram

et al. 2020

Mater. Res. Express

147

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Cobalt oxide nanoparticles (Co 3 O 4 -Nps) have many applications and now a days the green methods of synthesis of these NPs are preferred over other methods because of associated benefits. In this study, Co 3 O 4 -Nps were synthesized by using leaves extract of Populus ciliata (safaida) and cobalt nitrate hexa hydrate as a source of cobalt. The synthesized NPs were analyzed by different techniques such as fourier transform spectroscopy (FTIR), x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Antibacterial activities of the synthesized Co 3 O 4 -Nps were evaluated against gram negative and gram positive bacteria and found active against Escherichia coli (E. coli), Klebseilla pneumonia (K. pneumonia), Bacillus subtillus (B.subtillus) and Bacillus lichenifermia (B. lichenifermia). The activity results were analyzed statistically by one-way ANOVA, with 'Dunnett's Multiple Comparison Test'. The maximum mean activity (21.8±0.7) was found for B. subtilis and minimum mean activity (14.0±0.6) was observed for E. coli.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Green synthesis of cobalt oxide nanoparticles for potential biological applications

Hafeez

Shaheen

Akram

et al. 2020

Mater. Res. Express

147

View full text Add to dashboard Cite

show abstract

“…However, for the cases of Co oxide and other oxide NPs, evidence of the opposite trend was also noticed [ 24 – 27 ]. The higher effectiveness of the Co oxide NPs against gram-positive bacteria could be related to an enhanced cell wall permeability resulting from the interactions with the nanoparticles [ 12 ]. At present, there is still limited understanding on the exact mechanism of the antibacterial action of the metallic nanoparticles.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the antibacterial effect of cobalt nanoparticles against multi-drug resistant pathogens

et al. 2021

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This study aimed to estimate the effect of cobalt nanoparticles (Co NPs) with different concentrations against multidrug-resistant (MDR) pathogenic bacteria. Three isolates of (gram-positive), . (gram-negative), and (gram-negative) bacteria were extracted from various clinical examples utilizing routine methods on bacteriological culture media. The antibacterial sensitivity of commercial antibiotics such as Ciprofloxacin, Cefotaxime, Gentamycin, and Amoxicillin was broken down on a Muller Hinton agar plate and evaluated using the disk diffusion method. The study results demonstrated the antibacterial effect of the Co NPs against the bacterial isolates with three different concentrations utilized in the study. The results indicated that the Co NPs showed the highest antibacterial activity when utilizing 100 μg/ml against followed by and with zones of inhibition measured as 22.2±0.1 mm, 20.3±0.15 mm, and 15.8±0.1 mm; respectively. Co NPs at a 100 μg/mL concentration showed higher inhibition zones than several common antibiotics except for Ciprofloxacin, which demonstrated better antibacterial activity against the bacterial isolates employed in this study. Scanning Electron Microscope (SEM)and X-Ray diffraction (XRD)studies confirmed that Cobalt nanoparticles (Co NPs) were synthesized from cobalt sulphate solution with a size ranging from 40 nm to 60 nm. The nanoparticles showed a crystalline structure with a round shape and smooth surface. The antibacterial resistance of Co NPs against three common bacteria such as , , and was assessed in this study. The optimum concentration of the Co NPs was identified as 100 μg/ml, which could provide a similar or higher antibacterial effect.

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“…The development of these ecofriendly methods for the synthesis of nanoparticles is growing into an imperative twig of nanotechnology, which have many applications [1][2][3]. Biological customs of nanoparticles (NPs) synthesis using microorganisms [4,5], enzymes [6], fungus [7], and plants or plant extracts [8][9][10]. The strong electrolytic salts are mainly used in the green synthesis of nanoparticles especially nitrate (NO3 -) salts are majorly used in this synthesis.…”

Section: Introductionmentioning

confidence: 99%

Review on Green Synthesis of Nanoparticles using Various Strong Electrolytic Metal Solutions Mediated by Various Plant Parts

Vanitha¹,

Manikandan²,

Dhinakaran³

2022

J. Nanosci. Tech.

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The present review targets the comparative biogenic synthesis and mechanisms of nanoparticles using various plant-parts extracts and various solutions of strong electrolytic metal salts. The metal salts are AgNO3, Zn(OAc)2, Zn(NO3)2, ZnSO4, CuSO4.5H2O, Cu(NO3)2, Cu(OAc)2, CuCl2, HAuCl4.3H2O, Mg(NO3)2, Mg(OAc)2, TiO(OH)2, Fe(NO3)2.6H2O, FeCl3.6H2O, FeCl2.4H2O, Al(NO3)2, BaCl2·2H2O, Bi(NO3)2, PdCl2, H2PtCl6.6H2O, NaHSeO3, Na2SeO3, Ca(NO3)2.4H2O, ZrOCl2.4H2O, Zr(OAc)4, NiCl2, NiSO4.6H2O, Ni(NO3)2, VCl2, Co(NO3)2 6H2O, CoCl2, Hg(OAc)2, Mn(OAc)2, (NH4)6Mo7O24, Sr(NO3)2, SnCl2.2H2O, Na2S2O3.5H2O, K2Cr2O7, Cr(NO)3.9H2O and Pb(NO3)2. These salts are soluble to produce to highly active positive metal ions in deionised water. These ions are effectively nucleated in the plant constituents. The plant acts akin to a huge ‘‘bio-laboratory” comprising of leaves, seeds, steam, root, sprout, fruits, latex, parks, fruits peel, fruits, juices. etc… which are composed of biomolecules and phytoconstituents. These naturally happening biomolecules and phytoconstituents have been recognized to play an energetic role in the formation of nanoparticles with discrete shapes and sizes thus acting as a pouring force for the manipulative of greener, safe and environmentally benign protocols for the synthesis of nanoparticles.

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Biosynthesis of Cobalt Oxide Nanoparticles - A Short Review

Cited by 11 publications

References 10 publications

Green synthesis of cobalt oxide nanoparticles for potential biological applications

Green synthesis of cobalt oxide nanoparticles for potential biological applications

Evaluating the antibacterial effect of cobalt nanoparticles against multi-drug resistant pathogens

Review on Green Synthesis of Nanoparticles using Various Strong Electrolytic Metal Solutions Mediated by Various Plant Parts

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