Optimal parameters for synthesizing single phase spinel-type Co2SnO4 by sol–gel technique: Structure determination and microstructure evolution

Aguilar-Martínez, J.A.; Esneider-Alcalá, Miguel; Hernández, M.B.; Pech-Canul, M.I.; Shaji, Sadasivan

doi:10.1016/j.jallcom.2013.05.146

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…Since the solubility of In 2 O 3 in SnO 2 has been reported [18] to be about 96.1-94.4 mol % SnO 2 (3.9-5.6 mol % In 2 O 3 ), and as no free In 2 O 3 was identified by the diffractometer, the authors suggest that indium oxide was incorporated into the SnO 2 lattice modifying its crystal structure from tetragonal to cubic. Although the spinel phase Co 2 SnO 4 is not detected by conventional XRD analysis, analysis by DTA/TGA reveals an endothermic peak at 920 • C, which in accord to previous works by the same research group, corresponds to spinel formation [17,19]. Figure 4a shows what appears to be a habitus of SnO 2 single crystals formed during sintering on the surface of samples.…”

Section: Resultssupporting

confidence: 85%

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Inhibition grain growth and electrical properties by adding In2O3 to SnO2-Co3O4-Ta2O5 ceramics

et al. 2018

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In this contribution the effect of In2O3 additions on the microstructure, physical, and electrical properties of the SnO2-Co3O4-Ta2O5 ceramic system was investigated. Since the effect of In2O3 has been studied typically at low levels, special attention has been paid to the effect of high levels (1 and 2 mol % In2O3) in the ceramics. Results show that up to 0.1 mol % In2O3, an increase of indium oxide content is correlated with grain size reduction and an increase of the nonlinearity coefficient (a) and breakdown voltage (EB), producing an augmentation by a factor of 2 in the nonlinearity coefficient and an increment by a factor of 8 in the breakdown voltage. However, shrinkage () and measured density are not influenced by the addition of indium oxide. For samples with 1 and 2 mol % In2O3, in non-calcined condition, In2O3 is present with cubic structure. However, in calcined specimens, In2O3 is not detected anymore and SnO2-crystal structure undergoes a change from tetragonal to cubic. These ceramic samples exhibit high resistivity, behaving like dielectric materials.

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Section: Resultssupporting

confidence: 85%

“…Details on the formation mechanism of the Co 2 SnO 4 phase detected by DTA/TGA are reported elsewhere [17,19].…”

Section: Resultsmentioning

confidence: 99%

Inhibition grain growth and electrical properties by adding In2O3 to SnO2-Co3O4-Ta2O5 ceramics

et al. 2018

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“…According to the XRD results, the grain size increases proportionally with the temperature. Meanwhile, the agglomeration also increases, as has been shown in some previous studies [38,43]. In the SEM micrograph shown in Figure 2, particle agglomeration is clearly observed, with aggregate diameters in the range of 100 to 800 nm.…”

Section: Morphological Study Of Sno2 Particlessupporting

confidence: 79%

Corrosion Protection of A36 Steel with SnO2 Nanoparticles Integrated into SiO2 Coatings

et al. 2020

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Tin oxide (SnO2) nanoparticles were successfully added to silicon oxide (SiO2) coatings deposited on A36 steel by the sol-gel and dip-coating methods. These coatings were developed to improve the performance of corrosion protection of steel in a 3 wt % NaCl solution. The effects of modifying the SnO2 particle concentration from 0–7.5 vol % were investigated by polarization resistance, Tafel linear polarization, and electrochemical impedance spectroscopy (EIS). The formation of protective barriers and their corrosion inhibition abilities were demonstrated. It was found by electrochemical studies that all of the coated samples presented higher corrosion resistances compared with an uncoated sample, indicating a generally beneficial effect from the incorporation of the nanoparticles. Furthermore, it was established that the relationship between the SnO2 content and the corrosion inhibition had parabolic behaviour, with an optimum SnO2 concentration of 2.5 vol %. EIS showed that the modified coatings improved barrier properties. The resistance for all of the samples was increased compared with the bare steel. The corrosion rate measurements highlighted the corrosion inhibition effect of SnO2 nanoparticles, and the Tafel polarization curves demonstrated a decrease in system dissolution reactions at the optimal nanoparticle concentration.

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“…The TG curve shows that the pyrolysis of the three samples was carried out in three steps: from room temperature to 200 • C, from 200 • C to 350 • C, and from 350 • C to 450 • C. The weight loss below 200 • C came from the evaporation of water physically adsorbed in the skeleton, and the weight loss around 300 • C came from the pyrolysis of organic groups in the gel and the removal of Cl − containing groups (there are a lot of Clions from CoCl 2 and SnCl 2 in the gel network, which may coordinate with Co (II) and Sn (II) or play a role of charge compensation in the network). The weight loss around 400 • C came from the gel conversion to Co 2 SnO 4 [8]. From Co 2 Sn(OH) 6 -1 to Co 2 Sn(OH) 6 -2 and then to Co 2 Sn(OH) 6 -3, with the increase of PPA content in the precursor, the weight loss increased gradually from 200 • C to 350 • C, and at the same time, the weight loss increased from 350 • C to 450 • C [9].…”

Section: Pore Structure and Microstructure Of Macroporous Co2sno4/c C...mentioning

confidence: 99%

Construction of Macroporous Co2SnO4 with Hollow Skeletons as Anodes for Lithium-Ion Batteries

Wang

Guo

et al. 2022

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Increasing the energy density of lithium-ion batteries (LIBs) can broaden their applications in energy storage but remains a formidable challenge. Herein, with polyacrylic acid (PAA) as phase separation agent, macroporous Co2SnO4 with hollow skeletons was prepared by sol-gel method combined with phase separation. As the anode of LIBs, the macroporous Co2SnO4 demonstrates high capacity retention (115.5% at 200 mA·g−1 after 300 cycles), affording an ultrahigh specific capacity (921.8 mA h·g−1 at 1 A·g−1). The present contribution provides insight into engineering porous tin-based materials for energy storage.

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Optimal parameters for synthesizing single phase spinel-type Co2SnO4 by sol–gel technique: Structure determination and microstructure evolution

Cited by 10 publications

References 26 publications

Inhibition grain growth and electrical properties by adding In2O3 to SnO2-Co3O4-Ta2O5 ceramics

Inhibition grain growth and electrical properties by adding In2O3 to SnO2-Co3O4-Ta2O5 ceramics

Corrosion Protection of A36 Steel with SnO2 Nanoparticles Integrated into SiO2 Coatings

Construction of Macroporous Co2SnO4 with Hollow Skeletons as Anodes for Lithium-Ion Batteries

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