Synthesis and characterization of NiCo2O4 spinel using gelatin as an organic precursor

Peres, A.P.S.; Lima, Amanda Camerini; Barros, Bráulio Silva; Melo, D.M.A.

doi:10.1016/j.matlet.2012.08.044

Cited by 16 publications

(15 citation statements)

References 13 publications

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“…Then the powder was calcined at different temperatures namely 400 °C, 600 °C and 800 °C Figure 1A(a1-a3) shows the XRD patterns of NiCo 2 O 4 spinel structure calcined at three different temperatures such as 800 °C, 600 °C and 400 °C respectively. Characteristic diffraction lines of the NiCo2O4 spinel structure were well matched with standard JCPDS (73-1702) in all calcined samples [9]. The peaks related to NiO phase were also identified from the XRD spectrum.…”

Section: Synthesis Of Nickel Cobaltitesupporting

confidence: 67%

Surfactant Assisted Growth and Optical Studies of NiCo2O4 Nanostructures through Microwave Heating Method

Babu¹,

Ravi²,

Hayakawa³

2013

IJSEA

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A fast and facile method has been imposed for the preparation of NiCo 2 O 4 nanostructures using metal nitrate as a precursor material and CTAB as a surfactant. The prepared samples were characterized by Powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Scanning electron microscopy (SEM), Raman and PL spectroscopy. It was found that the synthesis route proposed in this work favored the formation of NiCo 2 O 4 spinel phase at low temperature. The surfactant CTAB was chosen to control over the nucleation, growth and agglomeration nature of observed NiCo 2 O 4 nanocrystalline products. With the effect of surfactant, the obtained NiCo 2 O 4 has been used for various promising potential applications. Based on the observed experimental observations and analysis, a possible microwave reaction mechanism is proposed to synthesis NiCo 2 O 4 nanostructured materials to enrich the structural, morphological and optical properties of NiCo 2 O 4 nanostructures.

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Section: Synthesis Of Nickel Cobaltitesupporting

confidence: 67%

Surfactant Assisted Growth and Optical Studies of NiCo2O4 Nanostructures through Microwave Heating Method

Babu¹,

Ravi²,

Hayakawa³

2013

IJSEA

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“…The second one is at 62.8°, the position of which is lower than the nearest NiO(220) and Co 3 O 4 (440). As a result, these two peaks were attributed to the formation of a solid solution Ni x Co 1-x O [46].Ni-Co/CeO 2 -700 and Ni-Co/CeO 2 -900 also exhibit a weak diffraction peak at 37.2°-37.3° between NiO (111) and Co 3 O 4 (311), indicating the formation of a nickel-cobalt mixed oxide.…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 97%

Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Üner

2015

Applied Catalysis B: Environmental

347

157

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“…The complete reduction of the catalysts was verified according to their X-ray diffraction patterns before (fresh catalysts, Figure 2a) and after a reduction stage at 650 • C and 1 h ( Figure 2b). In fresh catalysts, (111), (200), (220), (311), and (222) planes of the face centered cubic (fcc) NiO [44], or of their respective Ni x Do 1−x O alloys [45], appeared at 37.3, 43.4, 62.9, 75.5, and 79.5 • , respectively. In addition, other crystalline phases as NiCo 2 O 4 spinel [46,47] or Fe 2 O 3 , were also detected in Ni-Co/Al and Ni-Fe/Al catalysts, respectively.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

2018

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The catalytic decomposition of methane (CDM) process produces hydrogen in a single stage and avoids CO 2 emission thanks to the formation of high added value carbon nanofilaments as a by-product. In this work, Ni monometallic and Ni-Co, Ni-Cu, and Ni-Fe bimetallic catalysts are tested in the CDM reaction for the obtention of fishbone carbon nanofibers (CNF). Catalysts, in which Al 2 O 3 is used as textural promoter in their formulation, are based on Ni as main active phase for the carbon formation and on Co, Cu, or Fe as dopants in order to obtain alloys with improved catalytic behaviour. Characterization of bimetallic catalysts showed the formation of particles of Ni alloys with a bimodal size distribution. For the doping content studied (5 mol. %), only Cu formed an alloy with a lattice constant high enough to be able to favor the carbon diffusion through the catalytic particle against surface diffusion, resulting in higher carbon formations, longer activity times, and activity at 750 • C; whereas Ni, Ni-Co, and Ni-Fe catalysts were inactive. On the other hand, Fe also improved the undoped catalyst performance presenting a higher carbon formation at 700 • C and the obtention of narrow carbon nanofilaments from active Ni 3 Fe crystallites.

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Synthesis and characterization of NiCo2O4 spinel using gelatin as an organic precursor

Cited by 16 publications

References 13 publications

Surfactant Assisted Growth and Optical Studies of NiCo2O4 Nanostructures through Microwave Heating Method

Surfactant Assisted Growth and Optical Studies of NiCo2O4 Nanostructures through Microwave Heating Method

Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Co-, Cu- and Fe-Doped Ni/Al2O3 Catalysts for the Catalytic Decomposition of Methane into Hydrogen and Carbon Nanofibers

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