Solid-state thermal decomposition of the [Co(NH3)5CO3]NO3·0.5H2O complex: A simple, rapid and low-temperature synthetic route to Co3O4 nanoparticles

Farhadi, Saeed; Safabakhsh, Jalil

doi:10.1016/j.jallcom.2011.11.135

Cited by 38 publications

(20 citation statements)

References 68 publications

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“…They exhibit an agglomerated morphology, similar to that obtained using different methods as reported previously. 50,51 As found in those studies, TEM images showed bigger agglomerated particles (see Fig. 3(a)).…”

Section: Nanostructured Metal Oxidessupporting

confidence: 81%

Synthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors

et al. 2017

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International audienceThe simple reaction of chitosan with metallic salts yields (chitosan) (MLn)(x), MLn = MnCl2, CoCl2, NiCl2, macromolecular complexes which, after a thermal treatment at 800 degrees C under air, give nanostructured Mn2O3, Co3O4 and NiO. The polymer acts as a template in the solid state, which is eliminated after the combustion process. At an intermediate stage, a layered graphitic carbon matrix was observed by HRTEM over the grown metal oxides. A mechanism for the growth of nanostructured oxides is discussed, including Raman studies. The nanostructured Mn2O3, Co3O4 and NiO particles grow over graphite layers and the solid-state role of chitosan is crucial for the formation of this graphite substrate. An antiferromagnetic transition was observed in Co3O4 nanoparticles, with T-N = 38 K, whereas NiO nanoparticles behave as a superparamagnetic material with a blocking temperature above 300 K

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Section: Nanostructured Metal Oxidessupporting

confidence: 81%

Synthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors

et al. 2017

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“…XRD patterns of Co 3 O 4 nanoparticles shows peaks with 2 theta values of 31.28, 36.84, 38.54, 44.82, 59.39 and 65.24 corresponding to (220), (311), (222), (400), (511) and (440) planes, respectively, and peaks are in good agreement with the diffraction data card JCPDS No. 043–1003 . The reflections in the observed XRD pattern of nanoparticles obtained from the complex ( 2 ) can be indexed to the V 2 O 5 structure.…”

Section: Resultsmentioning

confidence: 99%

Co(III), V(IV) and Cu(II) complexes of bidentate N,O‐donor Schiff base ligands: Characterization, anticancer activities and metal oxide nanoparticles preparation via solid state thermal decomposition

Abbasi

Salehi

Khaleghian

et al. 2018

Applied Organom Chemis

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Three new mononuclear Schiff base complexes [Co(L1)3 (1), VO(L1)2 (2) and Cu(L2)2 (3)] were synthesized, characterized and used as a precursor for preparation of metal oxide nanoparticles. The crystal structure of compounds was determined using single crystal X‐ray diffraction. The Co(III) coordination sphere consists of three phenolato oxygens and three imino nitrogen atoms from three Schiff base ligands, thus forming a distorted octahedral geometry. In complex (2), the vanadium(IV) is five‐coordinated in a regular tetragonal pyramid fashion and the Cu(II) ion is four coordinated with a square‐planar geometry in the complex (3). The nanoparticles were characterized by Fourier transform infrared spectroscopy (FT‐IR), X‐ray powder diffraction (XRD) and field emission scanning electron microscopy (FE‐SEM). In vitro cell proliferation via MTT assay was studied to calculate the cytotoxicity of complexes and metal oxide nanoparticles against gastric cancer cell line (MKN‐45). The results showed that all compounds have anticancer activity with dose–response dependency.

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“…The spectra of the Co3O4 show five main peaks at 673, 606, 515, 472 and 192 cm −1 . The peak at 673 cm −1 with A1g symmetry can be attributed to the octahedral sites CoO6 (Co 3+ ), whereas the peaks at 192 cm −1 correspond to the tetrahedral sites CoO4 (Co 2+ ) with the F2g symmetry mode [30][31][32][33]. The bands at 606 cm −1 and 515 cm −1 can be attributed to the Fg2 symmetry mode and the peak at 472 cm −1 corresponds to the Eg mode [30][31][32][33].…”

Section: Characterizationmentioning

confidence: 98%

“…The peak at 673 cm −1 with A 1g symmetry can be attributed to the octahedral sites CoO 6 (Co 3+ ), whereas the peaks at 192 cm −1 correspond to the tetrahedral sites CoO 4 (Co 2+ ) with the F 2g symmetry mode [30][31][32][33]. The bands at 606 cm −1 and 515 cm −1 can be attributed to the F g2 symmetry mode and the peak at 472 cm −1 corresponds to the E g mode [30][31][32][33]. The spectrum of the CeO 2 was associated with one intense peak at 465 cm −1 , which can be assigned to the symmetric O-Ce-O stretching mode of CeO 2 [34][35][36].…”

Section: Characterizationmentioning

confidence: 99%

On the Activity and Selectivity of CoAl and CoAlCe Mixed Oxides in Formaldehyde Production from Pulp Mill Emissions

et al. 2020

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Contaminated methanol has very good potential for being utilized in formaldehyde production instead of its destructive abatement. The activities, selectivities and stabilities of cobalt–alumina and cobalt–alumina–ceria catalysts prepared by the hydrotalcite-method were investigated in formaldehyde production from emissions of methanol and methanethiol. Catalysts were thoroughly characterized and the relationships between the characterization results and the catalytic performances were drawn. The preparation method used led to the formation of spinel-type structures in the form of Co2AlO4 based on x-ray diffraction (XRD) and Raman spectroscopy. Ceria seems to be present as CeO2, even though interaction with alumina is possible in the fresh catalyst. The same structure is maintained after pelletizing the cobalt–alumina–ceria catalyst. The cobalt–alumina–ceria catalyst was slightly better in formaldehyde production, probably due to lower redox temperatures and higher amounts of acidity and basicity. Methanol conversion is negatively affected by the presence of methanethiol; however, formaldehyde yields are improved. The stability of the pelletized catalyst was promising based on a 16 h experiment. During the experiment, cobalt was oxidized (Co2+ → Co3+), cerium was reduced (Ce4+ → Ce3+) and sulfates were formed, especially on the outer surface of the pellet. These changes affected the low temperature performance of the catalyst; however, the formaldehyde yield was unchanged.

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Solid-state thermal decomposition of the [Co(NH3)5CO3]NO3·0.5H2O complex: A simple, rapid and low-temperature synthetic route to Co3O4 nanoparticles

Cited by 38 publications

References 68 publications

Synthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors

Synthesis and magnetic properties of nanostructured metallic Co, Mn and Ni oxide materials obtained from solid-state metal-macromolecular complex precursors

Co(III), V(IV) and Cu(II) complexes of bidentate N,O‐donor Schiff base ligands: Characterization, anticancer activities and metal oxide nanoparticles preparation via solid state thermal decomposition

On the Activity and Selectivity of CoAl and CoAlCe Mixed Oxides in Formaldehyde Production from Pulp Mill Emissions

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