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- Title
Synthesis, Characterization and Optical Activity of RE-doped ZnWO<sub>4</sub> Nanorods and Nanospheres by Hydrothermal Method.
- Authors
Borges, Kellen Cristina Mesquita; de Fátima Gonçalves, Rosana; de Matos Rodrigues, Murillo Henrique; Arruda, Rívia Aparecida Reinalda; de Cassia Santos, Maria Rita; Marques, Ana Paula Azevedo; Godinho Júnior, Mario
- Abstract
This work has investigated the effect of different dopants on structure, morphology and optical property of ZnWO4. Rare-earth doped ZnWO4 (ZnWO4:RE, with 0.5, 1, and 2 mol% of Eu3+ and Pr3+) were successfully synthesized by coprecipitation method followed by microwave-assisted hydrothermal system at 140 °C for 1 h. XRD indicated that the crystals have a wolframite- type monoclinic structure and with the addition of dopants the crystallite size decreased. HR-TEM images revealed interesting homogenous nanorods for pure ZnWO4 crystals with grow along (021) direction. For ZnWO4: RE we have found nanospheres morphologies, in which the decreasing crystal size were dependent on the RE doping concentration. IR spectra confirm the crystals structure. Ultraviolet-Visible diffuse reflectance spectra indicated that the optical band gap varies with increasing replacement of Zn2+ by RE ions. Egap was characteristic of semiconductor materials.
- Subjects
NANORODS; SEMICONDUCTOR materials; OPTICAL rotation; CRYSTALS spectra; CRYSTAL structure; RARE earth metals
- Publication
Orbital: The Electronic Journal of Chemistry, 2019, Vol 11, Issue 2, p115
- ISSN
1984-6428
- Publication type
Article
- DOI
10.17807/orbital.v11i2.1350