Green synthesis of cobalt ferrite using grape extract: the impact of cation distribution and inversion degree on the catalytic activity in the decomposition of hydrogen peroxide

Tatarchuk, Tetiana; Danyliuk, Nazarii; Shyichuk, Alexander; Kotsyubynsky, Volodymyr; Lapchuk, Ivanna; Mandzyuk, Volodymyr

doi:10.1007/s42247-021-00323-1

Cited by 24 publications

(6 citation statements)

References 76 publications

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“…The Fe-O-Co interface and their bridge formations were attained from the phenolic compounds of the plant extract. The tetrahedral sites of Fe and Co [ 31 , 32 ] were confirmed by the peaks of 912 cm −1 , 545 cm −1 , and 445 cm −1 . The plant compounds induced spinel ferrite formation and motivated enhanced degradation and bio-activities.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic and Antibacterial Activity of CoFe2O4 Nanoparticles from Hibiscus rosa-sinensis Plant Extract

et al. 2022

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Biogenic CoFe2O4 nanoparticles were prepared by co-precipitation and Hibiscus rosa sinensis plant leaf was used as a bio-reductant of the nanoparticle productions. The biosynthesized CoFe2O4 nanoparticles were characterized by XRD, FTIR, UV, VSM, and SEM via EDX analysis. The cubic phase of biosynthesized CoFe2O4 nanoparticles and their crystallite size was determined by XRD. The Co-Fe-O bonding and cation displacement was confirmed by FTIR spectroscopy. The presence of spherically-shaped biosynthesized CoFe2O4 nanoparticles and their material were confirmed by SEM and TEM via EDX. The super-paramagnetic behaviour of the biosynthesized CoFe2O4 nanoparticles and magnetic pulse was established by VSM analysis. Organic and bacterial pollutants were eradicated using the biosynthesized CoFe2O4 nanoparticles. The spinel ferrite biosynthesized CoFe2O4 nanoparticles generate radical and superoxide ions, which degrade toxic organic and bacterial pollutants in the environment.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic and Antibacterial Activity of CoFe2O4 Nanoparticles from Hibiscus rosa-sinensis Plant Extract

et al. 2022

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“…A decrease in  has a relatively weak effect on the number of subspectra corresponding to the A-coordinated Fe 3+ , therefore, all magnetically non-equivalent coordination can be described by only one broad magnetic sextet. At the same time, a decrease in the inverse degree leads to significant changes in the probability of the ion configuration for Bcoordinated Fe 3+ , therefore, in this case, the multiple subspectra should be used [14] The values of isomeric shifts for tetrahedrally coordinated Fe 3+ are relatively smaller due to stronger covalent FeA-O bonds, which makes it possible to identify subspectra. The calculated ratio of the integral intensities of the subspectra corresponding to tetrahedrally and octahedrally coordinated Fe 3+ (SA and SB, respectively) allows calculating the inversion degree parameter as…”

Section: Resultsmentioning

confidence: 99%

Solution combustion synthesized NiFe2O4 / reduced graphene oxide composite nanomaterials: morphology and electrical conductivity

Boychuk

Zapukhlyak

Abaszade

et al. 2022

Phys. Chem. Solid St.

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Ultrafine NiFe2O4 (T0) and NiFe2O4 / rGO composites have been synthesized by solution combustion method. The presence of rGO in the composite (33 wt.% (T1) or 66 wt.% (T2)) causes a decrease in the average particle size of the oxide phase from 16 to 10-11 nm with their transition to superparamagnetic with a decrease in the mixed spinel inversion degree. The SBET values for T1 and T2 are 180 and 315 m2/g, respectively, decreasing to 78 and 169 m2/g after annealing in the temperature range of 200-800°C. Both micro- and small mesopores (size of 2.0-4.5 nm) have been observed for samples T2, while samples T0 and T1 are mainly mesopores. The small polaron mechanism of electrical conductivity is observed for pure spinel, when the electron hopping charge transport prevails for NiFe2O4 / rGO composites. It can be assumed that the GO component lowers the combustion reaction temperature and prevents particle agglomeration.

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“…These spectra have a complex composition; it was optimally fitted with 4 sextet and 2 doublet components, which correspond to differences in the Fe 3+ surrounding that cause changes in the effective magnetic fields at the nuclei and quadrupole splitting values. The association of Fe 3+ ions with tetrahedral and octahedral sites of the crystal structure was made using the values of the isomeric shift () of each sextet component, since  for tetrahedrally coordinated iron ions is lower due to the correspondingly greater strength of Fe-O covalent bonds [8]. An analysis of the integral intensities of the sextet components makes it possible to calculate the distribution of Fe 3+ ions between the tetra (A)-and octa(B)-sublattices: (Ni0.07Fe0.95)A[Ni0.93Fe1.05]BO4.…”

Section: Resultsmentioning

confidence: 99%

Effect of surfactant type on the magnetic and morphological properties of NiFeO4 / reduced graphene oxide composites

Boychuk

Kotsyubynsky

Rachiy

et al. 2022

Phys. Chem. Solid St.

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A systematic study of the effect of various types of surfactants (polyethylene glycol, Trinon X-100 and cetyltrimethylammonium bromide) and subsequent annealing on the magnetic ordering and morphology of the nickel ferrite / reduced graphene oxide composite materials has been carried out. Hydrazine hydrate has been used both as an agent to initiate precipitation and as a reducing agent to remove oxygen functionality from the surface of graphene oxide particles. To characterize the material, Mössbauer spectroscopy and nitrogen absorption porosimetry have been used. The obtained result suggests a new way for one-pot synthesis of NiFe2O4/rGO composite materials with controlled magnetic ordering and porous structure.

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Green synthesis of cobalt ferrite using grape extract: the impact of cation distribution and inversion degree on the catalytic activity in the decomposition of hydrogen peroxide

Cited by 24 publications

References 76 publications

Photocatalytic and Antibacterial Activity of CoFe2O4 Nanoparticles from Hibiscus rosa-sinensis Plant Extract

Photocatalytic and Antibacterial Activity of CoFe2O4 Nanoparticles from Hibiscus rosa-sinensis Plant Extract

Solution combustion synthesized NiFe2O4 / reduced graphene oxide composite nanomaterials: morphology and electrical conductivity

Effect of surfactant type on the magnetic and morphological properties of NiFeO4 / reduced graphene oxide composites

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