Effect of annealing temperature on antibacterial, antifungal and structural properties of bio-synthesized Co<sub>3</sub>O<sub>4</sub> nanoparticles using Hibiscus Rosa-sinensis

Anuradha, C. T.; Raji, P.

doi:10.1088/2053-1591/ab2f9e

Cited by 30 publications

(12 citation statements)

References 38 publications

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“…As shown in figure 7(a), it can be observed that the heteroplasmon nanoparticles had better crystallinity under various calcination temperatures. With the rose of the calcination temperature, the intensity of diffraction peak gradually increased [23,24], but the ratio of Fe 39.24 emu g −1 at 400 °C with the increase of the calcination temperature [27], and the saturation magnetization was largest at 200 °C.…”

Section: Calcination Temperaturementioning

confidence: 96%

“…In this project, we proposed the preparation of α-Fe 2 O 3 /Fe 3 O 4 heteroplasmon nanoparticles by a feasible and facile hydrolysis-combustion-calcination process of ferric nitrate, and the effects of hydrolysis time, hydrolysis temperature, Fe 3+ concentrations, anhydrous ethanol dosage, calcination temperature [23][24][25], and calcination time on properties of α-Fe 2 O 3 /Fe 3 O 4 were revealed.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Liu

Zhang

Wang

et al. 2022

Mater. Res. Express

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In this work, a feasible and facile hydrolysis-combustion-calcination process of ferric nitrate for the preparation of magnetic α-Fe2O3/Fe3O4 heteroplasmon nanoparticles was represented. The influences of hydrolysis time, hydrolysis temperature, Fe3+ concentration, anhydrous ethanol volume, calcination time, and calcination temperature on the properties of α-Fe2O3/Fe3O4 heteroplasmon nanoparticles were investigated. According to a series of characterization analysis, the optimal preparation conditions were confirmed: 0.05 M Fe(NO3)3·9H2O was hydrolyzed at 90 ℃ for 8 h, and then the precursor was calcined at 200 ℃ for 2 h with 20 mL anhydrous ethanol. While, the morphology of α-Fe2O3/Fe3O4 heteroplasmon were spherical structures with the average particle size of about 46 nm, and their saturation magnetization was 54 emu g-1. The α-Fe2O3/Fe3O4 heteroplasmon nanoparticles possessed controllable magnetic properties and a more stable state, which suggested promising applications.

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Section: Calcination Temperaturementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Liu

Zhang

Wang

et al. 2022

Mater. Res. Express

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“…Nanoparticles agglomerate and reduce high energy which is associated with a higher surface area to volume ratio. Different phytochemicals that are present in plants act as capping, stabilizing, and reducing ends which reduce the agglomeration of Co 3 O 4 -NPs and give these nanoparticles a characteristic feature of controlling the structural morphology and stabilizing the synthesis process of nanoparticles [9]. Plant-based nanoparticles offer several advantages, including being readily accessible, safe to handle, and containing a wide range of biomolecular compounds such as alkaloids, terpenoids, phenols, flavonoids, tannins, and quinines are the compounds that facilitate nanoparticle synthesis [10] [11].…”

Section: Ntroductionmentioning

confidence: 99%

Green synthesis of cobalt oxide nanoparticles using roots extract of Ziziphus Oxyphylla Edgew its characterization and antibacterial activity

Saeed

Mazhar

Raees

et al. 2022

Mater. Res. Express

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In this modern era, antibiotic resistance is a significant issue that poses a threat to public health. Nanotechnology is an emerging field of science because nanoparticles could be the best alternative to antibiotics. Most nanoparticles are prepared by the green synthesis method because of their less toxicity, low cost, and non-hazardous nature. In this study, cobalt oxide nanoparticles (Co3O4-NPs) were synthesized from roots extract of Ziziphus Oxyphylla Edgew by using cobalt chloride hexahydrate. After the successful synthesis of nanoparticles, various methods were used to analyze these nanoparticles, including Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis, and energy dispersive analysis of x-ray. Scanning electron microscopy images reveal the spherical and irregular structure of Co3O4-NPs shaving a particle size between 40 to 60 nm. X-ray diffraction analysis revealed the crystalline nature of cobalt oxide nanoparticles with face-centered cubic structure and a size of 15-20 nm. The antibacterial activity of Co3O4-NPs was analyzed for different dilutions against two different bacteria: gram-negative (E. coli) and gram-positive (S. aureus) bacteria. The maximum zone of inhibition against gram-negative E. coli was calculated as 23.1 mm and 14.8 mm against S. aureus at a dilution of 16 mg/ml of cobalt oxide nanoparticle. This revealed the wide spectrum of antibacterial activity of the synthesized nanoparticle. It is suggested that root extract of cobalt oxide nanoparticles could be of great importance in pharmaceutical and medical science for their antimicrobial activity.

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“…Green-mediated cobalt oxide NPs have been synthesized using Hibiscus rosa-sinensis flower extract and their antibacterial activity was measured. These green-synthesized NPs showed promising activities against E. coli , Streptococcus mutans , S. aureus , and Klebsiella pneumonia [ 101 ]. Mainly two aspects have been suggested.…”

Section: Biological Activities Of Co and Co 3 O mentioning

confidence: 99%

Green fabrication of Co and Co₃O₄ nanoparticles and their biomedical applications: A review

et al. 2021

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Nanotechnology is the fabrication, characterization, and potential application of various materials at the nanoscale. Over the past few decades, nanomaterials have attracted researchers from different fields because of their high surface-to-volume ratio and other unique and remarkable properties. Cobalt and cobalt oxide nanoparticles (NPs) have various biomedical applications because of their distinctive antioxidant, antimicrobial, antifungal, anticancer, larvicidal, antileishmanial, anticholinergic, wound healing, and antidiabetic properties. In addition to biomedical applications, cobalt and cobalt oxide NPs have been widely used in lithium-ion batteries, pigments and dyes, electronic thin film, capacitors, gas sensors, heterogeneous catalysis, and for environmental remediation purposes. Different chemical and physical approaches have been used to synthesize cobalt and cobalt oxide NPs; however, these methods could be associated with eco-toxicity, cost-effectiveness, high energy, and time consumption. Recently, an eco-friendly, safe, easy, and simple method has been developed by researchers, which uses biotic resources such as plant extract, microorganisms, algae, and other biomolecules such as starch and gelatin. Such biogenic cobalt and cobalt oxide NPs offer more advantages over other physicochemically synthesized methods. In this review, we have summarized the recent literature for the understanding of green synthesis of cobalt and cobalt oxide NPs, their characterization, and various biomedical applications.

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Effect of annealing temperature on antibacterial, antifungal and structural properties of bio-synthesized Co₃O₄ nanoparticles using Hibiscus Rosa-sinensis

Cited by 30 publications

References 38 publications

Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Green synthesis of cobalt oxide nanoparticles using roots extract of Ziziphus Oxyphylla Edgew its characterization and antibacterial activity

Green fabrication of Co and Co₃O₄ nanoparticles and their biomedical applications: A review

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Effect of annealing temperature on antibacterial, antifungal and structural properties of bio-synthesized Co3O4 nanoparticles using Hibiscus Rosa-sinensis

Cited by 30 publications

References 38 publications

Preparation and characterization of α-Fe2O3/Fe3O4 heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Preparation and characterization of α-Fe2O3/Fe3O4 heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Green synthesis of cobalt oxide nanoparticles using roots extract of Ziziphus Oxyphylla Edgew its characterization and antibacterial activity

Green fabrication of Co and Co3O4 nanoparticles and their biomedical applications: A review

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Effect of annealing temperature on antibacterial, antifungal and structural properties of bio-synthesized Co₃O₄ nanoparticles using Hibiscus Rosa-sinensis

Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Green fabrication of Co and Co₃O₄ nanoparticles and their biomedical applications: A review