Ethanothermal reduction to MoO2 microspheres via modified Pechini method

Wang, Shutao; An, Changhua; Zhang, Yange; Zhang, Zude; Qian, Yitai

doi:10.1016/j.jcrysgro.2006.05.007

Cited by 26 publications

(12 citation statements)

References 25 publications

(42 reference statements)

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“…Bands at 492 and 533 cm −1 were most likely due to asymmetric and symmetric stretches of the monoclinic MoO 3 phase (Figure 12). As previously mentioned, the bands at 1625 and 3430 cm −1 were assigned to the H-O-H bending and stretching vibrations of the hydration water [19].…”

Section: Influence Of Calcinationmentioning

confidence: 63%

Optimization of the Synthesis of Nanostructured Tungsten-Molybdenum Bimetallic Oxide

et al. 2012

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nanoparticles were prepared through the Pechini process and were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), FT-IR spectrometer, and differential thermal analysis (TG-DSC) analyses. The polyesterification reaction, as the starting step, has a profound influence on the dispersion of the resulting nanoparticles. The molar ratios CA : TM = 2 and EG : CA = 1.5 are favorable for the preparation of nanoparticles having average particles size ranging from 2 to 9 nm. Meanwhile, the molar ratios CA : TM = 4 and EG : CA = 0.19 are favorable for the preparation of nanoparticles having an average particles size ranging from 11 to 29 nm. For the calcination step, increased calcination time (eight hours) at 500°C is advantageous for allowing the monometallic phases enough time to transform into the desired bimetallic phase.

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Section: Influence Of Calcinationmentioning

confidence: 63%

Optimization of the Synthesis of Nanostructured Tungsten-Molybdenum Bimetallic Oxide

et al. 2012

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“…The (i)-(iv) strongly affect the homogeneity of metal citrate complex and hence the structure of the perovskite after the pyrolysis. It also gets affected by route #A-F due to reactivity of the mixed solvents (water and ethylene glycol) [24,25,36]. These factors also control the formation of impurity phases.…”

Section: Resultsmentioning

confidence: 99%

“…Polymerization of metal citrates using ethylene glycol takes place via the following four steps [19,20,33,35,36].…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…It was also found that a clear gel could be obtained at any citric acid/ethylene glycol ratio [20]. In addition, it was reported that ethylene glycol is favorable for spherical morphology [36]. Therefore, NY is strongly route-dependent due to the ionic character of cation- anion bonding, in contrast with AY, which has a covalent bond.…”

Section: Reaction Mechanismmentioning

confidence: 99%

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Effects of anion and synthesis route on the structure of (La0.9 Sr0.1) (Cr0.85 Fe0.05 Co0.05 Ni0.05)O3−δ perovskite and removal of impurity phases

Gupta¹,

Whang²

2007

Solid State Ionics

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“…In practice, anodes prepared from bulky MoO 2 particles fail in cycling stability due to long solid‐state diffusion lengths for both Li + and the electrons . Downscaling of the particle size is therefore an important step on the way to revive the interest in the application of MoO 2 as anode material, and this is intimately correlated with the establishment of efficient synthesis methods . The reduced dimensions of MoO 2 nanoparticles shorten the diffusion lengths of Li + ions …”

Section: Lithium Ion Batteries: Additional Power From Nanoparticlesmentioning

confidence: 99%

25th Anniversary Article: Metal Oxide Particles in Materials Science: Addressing All Length Scales

2013

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The fundamental mission of materials science is the description of matter over all length scales. In this review, we apply this concept to particle research. Based on metal oxides, we show that every size range offers its specific features, and every size range had its era, when it was in the center of the research activities. In the first part of the review, we discuss on three metal oxides as examples, how and why the research focus changed its targeted size regime from the micrometer to the nanometer scale and back to the macroscopic world. Next, we present the distinct advantages of using nanoparticles over micrometer-sized particles in selected devices and we point out how such a shift in the size regime opens up new research directions. Finally, we exemplify the methods to introduce nanoparticles into macroscopic objects to make functional ceramics.

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Ethanothermal reduction to MoO2 microspheres via modified Pechini method

Cited by 26 publications

References 25 publications

Optimization of the Synthesis of Nanostructured Tungsten-Molybdenum Bimetallic Oxide

Optimization of the Synthesis of Nanostructured Tungsten-Molybdenum Bimetallic Oxide

Effects of anion and synthesis route on the structure of (La0.9 Sr0.1) (Cr0.85 Fe0.05 Co0.05 Ni0.05)O3−δ perovskite and removal of impurity phases

25th Anniversary Article: Metal Oxide Particles in Materials Science: Addressing All Length Scales

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