Effect of microwave power on the thermal genesis of Co3O4 nanoparticles from cobalt oxalate micro-rods

Abu-Zied, Bahaa M.; Bawaked, Salem M.; Kosa, Samia A.; Schwieger, Wilhelm

doi:10.1016/j.apsusc.2015.05.151

Cited by 50 publications

(21 citation statements)

References 57 publications

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“…The oxygen binding energy region of the as received samples exhibits a wide peak which can be described as the sum of four peaks (not shown here) with maxima at 530.2, 530.8, 531.8, and 532.2 eV. These peaks are typically assigned to oxygen lattice atoms, hydroxyl groups, the oxygen-carbon bond in surface carbonate species [34,35], and adsorbed water [36], respectively. As show in Fig.…”

Section: Characterization Of Co 3 O 4 Surface and Bulk Composition Dumentioning

confidence: 99%

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Alalwan

Cwiertny

Grassian

2017

Chemical Engineering Journal

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Section: Characterization Of Co 3 O 4 Surface and Bulk Composition Dumentioning

confidence: 99%

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Alalwan

Cwiertny

Grassian

2017

Chemical Engineering Journal

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“…The peak of Co 2p 3/2 can be fitted with three components. The two at lower binding energies of ≈779.85 and ≈780.89 eV could be ascribed to the octahedral Co 3+ ions and tetrahedral Co 2+ ions, respectively . The one at higher binding energy of ≈782.2 eV is ascribed to the multiple splitting of Co 2+ ions .…”

Section: Resultsmentioning

confidence: 91%

“…It can be unfolded into three peaks, indicating three chemical states of oxygen presented in the sample. The main peak at ≈530.1 eV could be assigned to lattice oxygen (O latt ) in Co 3 O 4 , the peak at ≈531.2 eV could be assigned to the presence of hydroxyl ions, and the peak at ≈532.4 eV could be assigned to the absorbed oxygen (COC and CO) from the surface‐absorbed carbon oxides . For the high‐resolution XPS spectrum of Co 2p (Figure c), two observed peaks with an intensity ratio of 1:2 are respectively corresponded to Co 2p 1/2 and Co 2p 3/2 with a spin–orbit splitting of ≈15.1 eV .…”

Section: Resultsmentioning

confidence: 98%

Well‐Designed Hierarchical Co₃O₄ Architecture as a Long‐Life and Ultrahigh Rate Capacity Anode for Advanced Lithium‐Ion Batteries

Liu

Deng

et al. 2017

Adv Materials Inter

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LIBs achieves more inspiration as well as revealing the mechanism behind.Among various transitional metal oxides (TMOs, TM = Ni, Fe, Mn, Co, etc.) [1,3,5,[12][13][14][15][16][17][18] used as anode materials for next-generation LIBs, tricobalt tetroxide (Co 3 O 4 ) has attracted special interest due to its high theoretical specific capacity of 890 mAh g −1 based on an eight-electron electrochemical reaction (Co 3 O 4 + 8Li + 8e − ↔ 4Li 2 O + 3Co). [17,18] The dischargecharge processes involve reversible formation and decomposition of Li 2 O accompanying a reaction of metal Co. Like other TMOs, however, lithium storage performance of Co 3 O 4 is also impeded by the poor conductivity and large volume expansion or contraction during lithiation-delithiation cycles. To address those problems, especially in recent years, considerable efforts have been devoted to synthesize numerous Co 3 O 4 nanostructures with designed textures and morphologies, which can not only shorten the transport/diffusion distances for the electrolyte ions as well as enlarge the surface area to improve more reactive sites but also inhibit the crack and pulverization of electrodes (Table 1). Several encouraging results should be worthwhile to pay attention to. For instance, Liang et al. prepared porous Co 3 O 4 nanoplates transformed from Co(OH) 2 nanoplates obtained by hydrothermal method, and as an anode material for LIBs it delivered a high discharge capacity of 1001 mAh g −1 at the 80th cycle without obvious capacity fade at a current density of 0.2 C (178 mA g −1 ). [29] Using graphene oxide (GO) as a sacrificial template, Li et al. fabricated porous Co 3 O 4 nanosheets for LIBs which showed high reversible capacity of 1380 mAh g −1 after 240 cycles at 500 mA g −1 with a coulombic efficiency over 99.1%. [47] Li et al. reported a novel shale-like nanostructure assembled with Co 3 O 4 layers, it delivered a high reversible capacity of 1045 mAh g −1 at 200 mA g −1 after 100 cycles with rate capability. [48] The fact that the layer structures of nanoplates and nanosheets exhibited amazing lithium storage abilities was mainly attributed to their 2D structures with porous nature, in which higher surface area and richer edge sites enable to provide more reactive sites for electrochemical reaction and more spaces for facilitating Li ions transport across the units of the whole anodes. However, all of the works did not completely embody the cycling performance In a simple strategy of mild heat-assistant precipitation followed by annealing in air, hierarchical Co 3 O 4 flower-like microspheres self-constructed by porous nanosheets are synthesized in bulk and tested as an anode material for advanced lithium-ion batteries (LIBs). Benefited from its high porosity and specific surface area as well as a necessary short activation, the as-prepared architecture shows an enhanced lithium storage performance of high capacity, long-life cycle, and ultrahigh rate capacity compared with the great majority of reported and commercial Co 3 O 4 materials. Especial...

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“…For the Sn:Co 3 O 4 sample this shoulder is not evident, rather a sharp peak is noted at 538 eV, with the peak at 552 eV increasing in intensity and the peak at 566 eV shifting to 572 eV. The first peak at 538–546 is indicative of lattice oxides and hence the reshaping of this peak indicates a re‐coordination in the lattice of the oxides due to the presence of the Sn. The peaks at 552 and above 560 usually indicate the presence of O−H hydroxyl groups present on the surface of the nanoparticles .…”

Section: Resultsmentioning

confidence: 96%

“…From Figure and L 3 /L 2 ratio of 2.39 and 1.83 is determined for Co 3 O 4 and Sn:Co 3 O 4 , respectively. The value of 2.39 is typical for cobalt oxide structures in which cobalt exists in two oxidation states: one‐third of the Co atoms are Co 2+ in a tetrahedral coordination to oxygen and two thirds are Co 3+ in an octahedral oxygen environment . A shift in the Co L 3,2 edge, accompanied by a decrease in the L 3 /L 2 ratio for the Sn modified Co 3 O 4 shows an alteration of in the 1/3Co 2+ + 2/3Co 3+ coordination, and is typical of Co 4+ oxides .…”

Section: Resultsmentioning

confidence: 99%

Novel Sn Doped Co₃O₄ Thin Film for Nonenzymatic Glucose Bio‐Sensor and Fuel Cell

et al. 2017

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A facile chemical solution deposition via two‐step spin coating technique was used to fabricate nano‐particulate novel Sn doped Co3O4 thin film for glucose sensor and fuel cell applications. Substitution of Sn into Co3O4 host lattice lead to a remarkable increase in the electrocatalytic activity of the Co3O4 electrode material. Film thickness played a significant role in enhancing the charge transferability of the electrode as was observed from electrochemical impedance spectroscopy (EIS). The best sensor exhibited two wide linear response ranges (2 μM up to ∼0.5 mM and 0.6 mM up to ∼5.5 mM respectively) with sensitivities of 921 and 265 μA cm−2 mM−1 respectively and low limit of detection of 100 nM (S/N=3). The sensor was very selective towards glucose in the presence of various interference and showed long term stability. Moreover, the developed thin film modified electrode could generate one electron current in nonenzymatic fuel cell setup at room temperature.

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Effect of microwave power on the thermal genesis of Co3O4 nanoparticles from cobalt oxalate micro-rods

Cited by 50 publications

References 57 publications

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Well‐Designed Hierarchical Co₃O₄ Architecture as a Long‐Life and Ultrahigh Rate Capacity Anode for Advanced Lithium‐Ion Batteries

Novel Sn Doped Co₃O₄ Thin Film for Nonenzymatic Glucose Bio‐Sensor and Fuel Cell

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Effect of microwave power on the thermal genesis of Co3O4 nanoparticles from cobalt oxalate micro-rods

Cited by 50 publications

References 57 publications

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Well‐Designed Hierarchical Co3O4 Architecture as a Long‐Life and Ultrahigh Rate Capacity Anode for Advanced Lithium‐Ion Batteries

Novel Sn Doped Co3O4 Thin Film for Nonenzymatic Glucose Bio‐Sensor and Fuel Cell

Contact Info

Product

Resources

About

Well‐Designed Hierarchical Co₃O₄ Architecture as a Long‐Life and Ultrahigh Rate Capacity Anode for Advanced Lithium‐Ion Batteries

Novel Sn Doped Co₃O₄ Thin Film for Nonenzymatic Glucose Bio‐Sensor and Fuel Cell