Facile Synthesis of Co3O4/CoO Nanoparticles by Thermal Treatment of Ball-Milled Precursors

Manouchehri, Iraj; Kameli, P.; Salamati, H.

doi:10.1007/s10948-011-1141-5

Cited by 18 publications

(13 citation statements)

References 29 publications

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“…XRD results reported by Bartůněk et al [5] and Manouchehri et al [12] showed the presence of a face-centered cubic phase with cell parameter α = 4.26 Å and space group F 3 3m [12]. In the FTIR spectrum, the appearance of a broad band at 450 cm −1 verified the formation of cubic CoO.…”

Section: Structure and Characterization Of Coo Nanoparticlesmentioning

confidence: 74%

“…Most nanoparticles had faceted morphology and high crystalline quality as verified by Selected-Area Electron Diffraction (SAED) analysis and High-Resolution Transmission Electron Microscopy (HRTEM) [26]. Pseudo-hexagonal [15,17,18,21], circular and occasionally rectangular [2] or uniform spherical [12] shaped nanoparticles were observed. In general, powders are homogeneously dispersed with dimensions ranging from 50 to 600 nm, in accordance with SEM results, mentioned above.…”

Section: Cobalt-based Nanomaterials From Metal-organic Framework (Mofs)mentioning

confidence: 90%

“…In the FTIR spectrum, the appearance of a broad band at 450 cm −1 verified the formation of cubic CoO. According to TEM the as-prepared CoO consisted of two types of structures, small nanoparticles and nanorods [12]. Shen et al claimed that the CoO nanoparticles exhibited quasi-spherical shape and their measured-from TEM micrographs-average particle size was 18 nm [16].…”

Section: Structure and Characterization Of Coo Nanoparticlesmentioning

confidence: 98%

“…The "carboxylate" term includes several organic species that contain at least one carboxyl group, such as oxalate, citrate, etc. Methods for synthesis of cobalt-carboxylates include (i) sol-gel [2,4], (ii) intimate mixing of cobalt ions [6][7][8], (iii) precipitation [9,10], (iv) hot oxidation-redox reaction [11], (v) ball milling [12] and (vi) microemulsion [13]. Reaction of cobalt acetate with a carboxylic acid, for example, leads directly to the synthesis of cobalt-carboxylate, when the carboxylic acid in question is stronger than acetic acid: Co(Ac) 2 + RCOOH → Co(RCOO) 2 + 2 AcH (1).…”

Section: Cobalt and Cobalt Oxide Nanoparticles From Carboxylatesmentioning

confidence: 99%

“…de Rivas et al prepared Co 3 O 4 nanoparticles via calcination of oxalate nanorods at 500°C in static air [15]. Cobalt [12]. de Rivas et al also used ball milling for synthesis of cobalt citrate starting from cobalt carbonate and citric acid [20].…”

Section: Cobalt Oxide Nanoparticles From Oxalate Precursorsmentioning

confidence: 99%

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Synthesis of Cobalt-Based Nanomaterials from Organic Precursors

Smyrnioti¹,

Ioannides²

2017

Cobalt

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Development of efficient and low-cost methods for the production of cobalt and cobalt oxide nanoparticles is of great interest. Such nanoparticles are typically prepared via transformation of precursors under controlled conditions. In the case of organic precursors, the production of said nanoparticles takes place through thermal decomposition of the organic moiety. The decomposition pathway of the precursor is greatly dependent on the type (i.e. inert, reducing or oxidizing) of the gaseous atmosphere prevailing during heating, as well as on the heating schedule itself. The characteristics of the organic group have also an important influence on the structure of the final material. The goal of the current work is to present a comprehensive review of the research work focusing on the synthesis of cobalt-based nanomaterials from activation of organic precursors.

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Section: Structure and Characterization Of Coo Nanoparticlesmentioning

confidence: 74%

Section: Cobalt-based Nanomaterials From Metal-organic Framework (Mofs)mentioning

confidence: 90%

Section: Structure and Characterization Of Coo Nanoparticlesmentioning

confidence: 98%

Section: Cobalt and Cobalt Oxide Nanoparticles From Carboxylatesmentioning

confidence: 99%

Section: Cobalt Oxide Nanoparticles From Oxalate Precursorsmentioning

confidence: 99%

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Synthesis of Cobalt-Based Nanomaterials from Organic Precursors

Smyrnioti¹,

Ioannides²

2017

Cobalt

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Coffee‐Waste Templating of Metal Ion‐Substituted Cobalt Oxides for the Oxygen Evolution Reaction

Chan

Tüysüz

2018

ChemSusChem

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A facile and scalable method using coffee waste grounds as a hard template has been developed to fabricate nanostructured Co O for the oxygen evolution reaction (OER). Co O incorporating metals with different valences (M/Co=1:4; M=Cu, Ni, Fe, Cr, and W) were also prepared with similar sheet-like structures comprising nanosized crystallites. After detailed characterization by X-ray diffraction, electron microscopy, and nitrogen sorption, the oxides were employed as OER electrocatalysts. Substitution of octahedral and tetrahedral sites of the spinel structure with divalent and trivalent transition metals (Cu, Ni, Fe, and Cr) increased the activity of Co O for the OER, whereas incorporation of hexavalent W led to formation of a second crystal phase and significantly higher electrocatalytic performance. Furthermore, this method is easily scaled up for mass production of Co O with the same nanostructure, which is highly desirable for large-scale application.

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