Structural and Electrical Properties of Cerium Oxides Doped by Sb3+ and Bi3+ Cations

Sandhya, K; Priya, Nidhi; Rajendran, Deepthi N.; Praveen, T.

doi:10.1007/s11664-020-08220-9

Cited by 8 publications

(8 citation statements)

References 24 publications

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“…This peak shift phenomenon showed the successful doping of Bi 3+ at the site of Sb in the SbPS 4 crystal. The ion radius of Bi 3+ (1.21 Å) is larger than that of Sb 3+ (0.76 Å); 35 so, the substitution of Bi 3+ makes the lattice parameter larger, which leads to the movement of diffraction peaks to a higher angle. Among them, the peak of the (020) and (022) crystal planes moved from 13.6° to 13.7° and from 15.7° to 15.9°, respectively.…”

Section: Resultsmentioning

confidence: 99%

High capacity and fast Na⁺ transport in the SbPS₄ material by Bi³⁺ substitution for sodium-ion batteries

Yin

Lü

et al. 2022

Inorg. Chem. Front.

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Section: Resultsmentioning

confidence: 99%

High capacity and fast Na⁺ transport in the SbPS₄ material by Bi³⁺ substitution for sodium-ion batteries

Yin

Lü

et al. 2022

Inorg. Chem. Front.

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“…The formed slurry is then stirred to attain good homogeneity, evaporated and dried overnight under inert flow to have the powdered nanoparticles (Fig 3b). To have the active catalyst, the powdered catalysts is reduced under H 2 at high temperature 4,6,37 .…”

Section: Impregnation Methodsmentioning

confidence: 99%

An overview on Metal doped / Supported Ceria Catalysts: Synthesis, Characterization and Applications

N.A¹,

Haruna²,

Salisu³

2022

juc

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Design of viable catalysts that exhibits high catalytic activity and stability, as well as resistance against deactivation could be achieved by selecting the right active metal and support, understanding their structure, synergy or the metal support interaction and by employing the right preparation technique. Numerous studies and reviews have dealt with various aspects of CeO2 based catalysts, with the sole target of understanding its activity in various reactions such as dry and steam reforming of methane. Good metal dispersion on CeO2 surface is explained to be the reason for the promising activity of this systems. This review focuses on the synthesis, characterization and application of some CeO2 doped/supported catalysts in hydrogen production by dry and steam reforming of methane, and other reactions. Various synthetic methods for the preparation of the metal doped/supported CeO2 catalysts were introduced with a focus on how to effectively produce stable and efficient catalysts. Subsequently, some advanced characterization techniques were presented to precisely probe the metal and CeO2 at the atomic level, which is critical in investigating the structure of the catalysts.

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“…Under the influence of IB-forming dopants (such as SnO2, TiO2, and Sb2O3), IB nucleation occurred in ZnO grains, and these grains grew dramatically and anisotropically in the direction of the inherent IB, causing plate-like development of the grains. Given the smaller ionic radius of Ga 3+ than that of Sb 3+ (0.076 nm) [24,38] and its larger electronegativity (1.579) than that of Sb 3+ (1.476) [39] , when Ga2O3 existed in the grain boundary, Ga 3+ could work as an IB-forming dopant and affect the growth behavior of ZnO grain more efficiently. When combined with the XPS results in Figure 4, we can see that with increased Ga2O3 in ZnO varistors, more Ga2O3 existed in the grain boundary, consequently, the maximum and minimum aspect ratios of ZnO grain initially increased slowly and then rapidly.…”

Section: Microstructure Characteristics Of Zno Based Varistorsmentioning

confidence: 99%

“…In summary, the electrical properties of the trivalent ion metallic oxide doped ZnO varistors have been extensively studied [23,24] , but it still exists some deficiencies(such as lower voltage gradient), also the effect of dopants on the mechanical and thermal properties of ZnO varistors is rarely reported. In this work, we introduced various Ga additives into a ZnO based varistor and selected nano-ZnO particles as the main raw materials to try to improve the voltage gradient and mechanical properties, modify the thermal properties of ZnO based varistors at same time.…”

Section: Introductionmentioning

confidence: 99%

Synchronously Improved Voltage Gradient and Mechanical Properties of ZnO Based Varistor by Doping Ga2O3

Wang¹,

Chen

Gao

et al. 2020

Preprint

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ZnO based varistors with high voltage gradient and excellent mechanical and thermal properties were fabricated by Ga2O3 doping and using nanoparticles. The compositions and microstructure of the varistors, as well as their electrical, mechanical and thermal properties were investigated by XRD, XPS, SEM, E-J, C-V, mechanical and thermal expansion measurements. Also, the mechanism of Ga2O3 addition on electrical and mechanical properties of the varistors was discussed detailedly. Results showed that the added Ga2O3 preferentially occupied the lattice position of ZnO crystal through the formation of a substitutional solid solution (Donor doping), they then occupied the void position through the formation of an interstitial solid solution (Acceptor doping), in which residual Ga2O3 existed in the grain boundary and served as inversion boundaries. The formation of the substitutional and interstitial solid solutions helped to improve the electrical properties, when the Ga2O3 content was 0.40 mol%, E1mA, α and K were 1235.00 V·mm− 1, 46.0 and 1.37, respectively, being due to the small particle size and the relative content of donor, acceptor and grain boundary in ZnO grain; The increased content of inversion boundaries stimulated the abnormal growth of ZnO grain, and the formed plate-like grain helped to improve the mechanical properties and thermal expansion coefficient of the varistors, values of σf, Ef, and KIC reached 147.43 MPa, 213.61 GPa and 2.05 MPa·m1/2, showing improvements of 25.29%, 47.67%, and 38.51%, respectively, compared with those of ZnO varistors without Ga2O3.

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Structural and Electrical Properties of Cerium Oxides Doped by Sb3+ and Bi3+ Cations

Cited by 8 publications

References 24 publications

High capacity and fast Na⁺ transport in the SbPS₄ material by Bi³⁺ substitution for sodium-ion batteries

High capacity and fast Na⁺ transport in the SbPS₄ material by Bi³⁺ substitution for sodium-ion batteries

An overview on Metal doped / Supported Ceria Catalysts: Synthesis, Characterization and Applications

Synchronously Improved Voltage Gradient and Mechanical Properties of ZnO Based Varistor by Doping Ga2O3

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Structural and Electrical Properties of Cerium Oxides Doped by Sb3+ and Bi3+ Cations

Cited by 8 publications

References 24 publications

High capacity and fast Na+ transport in the SbPS4 material by Bi3+ substitution for sodium-ion batteries

High capacity and fast Na+ transport in the SbPS4 material by Bi3+ substitution for sodium-ion batteries

An overview on Metal doped / Supported Ceria Catalysts: Synthesis, Characterization and Applications

Synchronously Improved Voltage Gradient and Mechanical Properties of ZnO Based Varistor by Doping Ga2O3

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High capacity and fast Na⁺ transport in the SbPS₄ material by Bi³⁺ substitution for sodium-ion batteries

High capacity and fast Na⁺ transport in the SbPS₄ material by Bi³⁺ substitution for sodium-ion batteries