A controllable one-pot hydrothermal synthesis of spherical cobalt ferrite nanoparticles: synthesis, characterization, and optical properties

Refat, Nedaa M.; Nassar, Mostafa Y.; Sadeek, Sadeek A.

doi:10.1039/d2ra03345c

Cited by 53 publications

(15 citation statements)

References 72 publications

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“…The lattice fringes of as-prepared CPCF NPs can be seen obviously in Fig. 6 C, the adjacent fringe spacing is about 0.253 nm, corresponding to the (311) lattice planes of Co Fe 2 O 4 NPs 47 , 48 . it can be seen the particles are nano sized and revealed it is in cubic shape and the average particle size of 18 nm which is agree well with the XRD result.…”

Section: Resultsmentioning

confidence: 94%

Promising photocatalytic and antimicrobial activity of novel capsaicin coated cobalt ferrite nanocatalyst

El‐Khawaga

El-Sayed

Fahim³

et al. 2023

Sci Rep

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In this study, CoFe2O4 nanoparticles were prepared by the co-precipitation method then surface modified with Capsaicin (Capsicum annuum ssp.). The virgin CoFe2O4 NPs and Capsaicin-coated CoFe2O4 NPs (CPCF NPs) were characterized by XRD, FTIR, SEM, and TEM. The antimicrobial potential and photocatalytic degradation efficiencies of the prepared samples via Fuchsine basic (FB) were investigated. The results revealed that CoFe2O4 NPs have spherical shapes and their diameter varied from 18.0 to 30.0 nm with an average particle size of 25.0 nm. Antimicrobial activity was tested on Gram-positive (S. aureusATCC 52923) and Gram-negative (E. coli ATCC 52922) by disk diffusion and broth dilution methods to determine the zone of inhibition (ZOI) and minimum inhibitory concentration (MIC), respectively. UV-assisted photocatalytic degradation of FB was examined. Various parameters affecting the photocatalytic efficiency such as pH, initial concentration of FB, and dose of nanocatalyst were studied. The in-vitro ZOI and MIC results verified that CPCF NPs were more active upon Gram-Positive S. aureus ATCC 52923 (23.0 mm ZOI and 0.625 μg/ml MIC) than Gram-Negative E. coli ATCC 52922 (17.0 mm ZOI and 1.250 μg/ml MIC). Results obtained from the photocatalytic activity indicated that the maximum FB removal achieving 94.6% in equilibrium was observed using 20.0 mg of CPCF NPS at pH 9.0. The synthesized CPCF NPs were effective in the removal of FB and also as potent antimicrobial agent against both Gram-positive and Gram-negative bacteria with potential medical and environmental applications.

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Section: Resultsmentioning

confidence: 94%

Promising photocatalytic and antimicrobial activity of novel capsaicin coated cobalt ferrite nanocatalyst

El‐Khawaga

El-Sayed

Fahim³

et al. 2023

Sci Rep

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“…In the TEM micrograph of the prepared MNP, it is clear that the obtained NPs are in a polygon shape with a size distribution from 15 to 70 nm (Figure a). The FT-IR spectrum of the MNP shows that the dominating signal at 567 cm –1 is due to Fe–O, which confirms the formation of iron oxide (Fe 3 O 4 ) . While the peak at 1631 cm –1 is corresponding to O–H bending, which confirmed the presence of hydroxyl groups on the MNP surfaces.…”

Section: Resultsmentioning

confidence: 75%

“…The FT-IR spectrum of the MNP shows that the dominating signal at 567 cm −1 is due to Fe−O, which confirms the formation of iron oxide (Fe 3 O 4 ). 57 While the peak at 1631 cm −1 is corresponding to O−H bending, which confirmed the presence of hydroxyl groups on the MNP surfaces. The peak observed at 3437 cm −1 is ascribed to O−H starching, indicating the presence of water molecules (Figure 2b).…”

Section: Iron Oxide Npsmentioning

confidence: 71%

Synthesis of Tungsten Oxide, Iron Oxide, and Copper-Doped Iron Oxide Nanocomposites and Evaluation of Their Mixing Effects with Cyromazine against Spodoptera littoralis (Boisduval)

Eldesouky,

Aseel,

Elnouby

et al. 2023

ACS Omega

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Nanotechnology research is emerging as a cuttingedge technology, and nanocomposites have played a significant role in pest control. Therefore, the present study focuses on the synthesis of tungsten oxide (WO 3 ), iron oxide (magnetic nanoparticle, MNP), and copper-doped iron oxide (MNP-Cu) nanocomposites and explores the different effects of their binary combinations with the insecticide cyromazine against Spodoptera littoralis. The synthesized nanoparticles were characterized by transmission electron microscopy, X-ray diffraction, Fouriertransform infrared spectroscopy, and Raman spectroscopy. None of the tested nanomaterials showed any toxicity against the different stages of S. littoralis. Larval and pupal durations increased with increasing cyromazine and nanomaterial concentrations. The longest larval and pupal durations were recorded under treatment with the mixture of cyromazine (100 mg/L) + MNP-Cu (500 mg/ L); the survival periods were 23.5 and 15.6 days, compared with 10.8 and 7.7 days in the control, respectively. The percentages of pupation and adult emergence were negatively affected by all treatments. Among the 500 mg/L nanomaterial combinations, only cyromazine (25 mg/L) and WO 3 (500 mg/L) resulted in adult emergence (at a rate of 27.3%). Some abnormalities in the S. littoralis stages were observed following treatment with the tested materials. The glutathione S-transferase and alpha-esterase enzyme activities in S. littoralis were significantly increased after treatment with cyromazine, followed by cyromazine/MNP-Cu combinations. The quantitative polymerase chain reaction (Q-PCR) data showed that all treated insects had a higher immune response than the control. Finally, mixes of nanocomposites and cyromazine may be suggested as viable alternatives for S. littoralis management.

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“…For example, Lu et al 27 reported that cobalt ferrite nanoparticles with a cubic morphology can be obtained using a hydrothermal route when a 1 : 1 molar ratio of cobalt and iron precursors is used. Refat et al 28 showed that the purity and crystallinity of CoFe 2 O 4 obtained through hydrothermal synthesis can be maintained at 180 °C. Also, in the case of NGO, it has been shown previously 29 that hydrothermal synthesis using N 2 H 4 at a lower temperature has unreacted nitride content adsorbed on the GO surface, whereas in hydrothermal treatment at a higher temperature of 180 °C, the reduction of GO using N 2 H 4 and ammonia affords more graphitic/pyridine N-incorporated into the carbon network of graphene sheets.…”

Section: Materials Characterizationmentioning

confidence: 99%

Tuning of cationic distribution in “partially inversed” cobalt ferrite spinel nanocubes via a nitrogen-doped graphene oxide support for enhanced bifunctional oxygen electrocatalysis

Jha,

Jain,

Palkovits

et al. 2023

J. Mater. Chem. A

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A controllable one-pot hydrothermal synthesis of spherical cobalt ferrite nanoparticles: synthesis, characterization, and optical properties

Abstract: A controllable synthesis of spherical cobalt ferrite nanoparticles with average crystallite size in the range of 3.6–12.9 nm using a facile, eco-friendly, hydrothermal method.

Cited by 53 publications

References 72 publications

Promising photocatalytic and antimicrobial activity of novel capsaicin coated cobalt ferrite nanocatalyst

Promising photocatalytic and antimicrobial activity of novel capsaicin coated cobalt ferrite nanocatalyst

Synthesis of Tungsten Oxide, Iron Oxide, and Copper-Doped Iron Oxide Nanocomposites and Evaluation of Their Mixing Effects with Cyromazine against Spodoptera littoralis (Boisduval)

Tuning of cationic distribution in “partially inversed” cobalt ferrite spinel nanocubes via a nitrogen-doped graphene oxide support for enhanced bifunctional oxygen electrocatalysis

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