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- Title
Influence of aliovalent V<sup>3+</sup> substitution on physicochemical characteristics of tetragonal SnO<sub>2</sub> nanoparticles.
- Authors
Singh, Davinder; Singh, Harjinder; Kumar, Naveen; Aggarwal, Nupur; Kapoor, Anu; Sharma, Anjana; Saini, Deepak
- Abstract
Polycrystalline pristine and V3+ modified SnO2 NPs [Sn(1−x)VxO2 NPs, where x = 0, 0.05, and 0.10] were synthesized using conventional sol-gel reaction route and their physicochemical investigations were carried out. Crystal structure information of all the compositions carried out using X-ray diffraction technique revealed that Sn(1−x)VxO2 NPs, where x = 0, 0.05, and 0.10 exhibit tetragonal rutile type symmetry with space group P 4 / 2 m n m with phase pure crystallinity. Fourier transform infrared (FTIR) spectra showed presence of hydroxyl group (–OH) and Sn-O-Sn vibrations due to hump located at 615 cm−1 confirming the formation of NPs. Microstructural analysis depicted that the grain size decreased from 40.25 ± 1.57 nm to 33.96 ± 1.16 nm with incorporation of smaller V3+ ion in the crystal framework of host SnO2 matrix. Dielectric studies revealed that real part of dielectric constant ( ϵ ′ ) decreases with increasing the frequency of the applied bias. Maxwell Wegner model and Koop's phenomenology were implemented to support the result. The maximum value of dielectric permittivity also decreased with increasing V3+ ion in the compositions. I-V characteristics of pristine and V3+-modified SnO2 NPs illustrated non-ohmic behavior and depicted that the resistance of the host SnO2 decreases with V3+ doping. PL spectra studies showed a characteristic hump located at ≈ 409 nm belonging to violet emission due to charge exchange mechanism.
- Subjects
CHARGE exchange; SYMMETRY groups; SPACE groups; CRYSTAL structure; PERMITTIVITY
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 9, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-10073-x