Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors
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Vranješ, MilaKonstantinović, Zorica
Pomar, A.
Kuljanin Jakovljević, Jadranka
Stoiljković, Milovan
Nedeljković, Jovan
Šaponjić, Zoran
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Hydrothermal synthetic route for synthesis of Ni2+ doped TiO2 nanocrystals showing room temperature ferromagnetism, using dispersion of titania nanotubes in the presence of Ni2+ ions at different pHs as precursors, is reported. Morphologies of tubular precursors and Ni2+ doped TiO2 nanocrystals were characterized by transmission electron microscopy. Titania nanotubes have outer diameter of about 10 nm while the length varies widely even reaching few hundred nanometers. Ni2+ doped TiO2 nanoparticles synthesized at pH 3 have polygonal shape and dimension of about 20 nm. Transmission electron microscopy analysis revealed presence of mixed shapes (polygonal and rod like) in the sample of Ni2+ doped TiO2 nanoparticles synthesized at pH 5. X-ray diffraction analysis of resultant powder and selected area electron diffraction pattern confirmed the anatase crystal phase of Ni2+ doped TiO2 nanoparticles independently of dopant concentrations (0.09, 0.25, 0.86, 1.48 and 1.80 at%), followed by sli...ght changes of their microstructural parameters. Reflection spectra of Ni2+ doped TiO2 nanoparticles revealed their altered optical properties in comparison to undoped TiO2 nanoparticles. Room temperature ferromagnetic ordering with saturation magnetic moment in the range of 10(-3)-5 x 10(-2) mu B per Ni atom was observed for all measured films made of Ni2+ doped TiO2 nanoparticles.
Keywords:
X-ray diffraction / Transmission electron microscopyTEM / Oxide materials / Nanostructured materials / Magnetic measurements / Hydrothermal synthesisSource:
Journal of Alloys and Compounds, 2014, 589, 42-47Funding / projects:
- MPNS COST Action [MP1106]
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-MESTD-Basic Research (BR or ON)-172056)
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
DOI: 10.1016/j.jallcom.2013.11.163
ISSN: 0925-8388
WoS: 000330181400007
Scopus: 2-s2.0-84890535197
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Institut za opštu i fizičku hemijuTY - JOUR AU - Vranješ, Mila AU - Konstantinović, Zorica AU - Pomar, A. AU - Kuljanin Jakovljević, Jadranka AU - Stoiljković, Milovan AU - Nedeljković, Jovan AU - Šaponjić, Zoran PY - 2014 UR - https://riofh.iofh.bg.ac.rs/handle/123456789/341 AB - Hydrothermal synthetic route for synthesis of Ni2+ doped TiO2 nanocrystals showing room temperature ferromagnetism, using dispersion of titania nanotubes in the presence of Ni2+ ions at different pHs as precursors, is reported. Morphologies of tubular precursors and Ni2+ doped TiO2 nanocrystals were characterized by transmission electron microscopy. Titania nanotubes have outer diameter of about 10 nm while the length varies widely even reaching few hundred nanometers. Ni2+ doped TiO2 nanoparticles synthesized at pH 3 have polygonal shape and dimension of about 20 nm. Transmission electron microscopy analysis revealed presence of mixed shapes (polygonal and rod like) in the sample of Ni2+ doped TiO2 nanoparticles synthesized at pH 5. X-ray diffraction analysis of resultant powder and selected area electron diffraction pattern confirmed the anatase crystal phase of Ni2+ doped TiO2 nanoparticles independently of dopant concentrations (0.09, 0.25, 0.86, 1.48 and 1.80 at%), followed by slight changes of their microstructural parameters. Reflection spectra of Ni2+ doped TiO2 nanoparticles revealed their altered optical properties in comparison to undoped TiO2 nanoparticles. Room temperature ferromagnetic ordering with saturation magnetic moment in the range of 10(-3)-5 x 10(-2) mu B per Ni atom was observed for all measured films made of Ni2+ doped TiO2 nanoparticles. T2 - Journal of Alloys and Compounds T1 - Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors EP - 47 SP - 42 VL - 589 DO - 10.1016/j.jallcom.2013.11.163 UR - conv_481 ER -
@article{ author = "Vranješ, Mila and Konstantinović, Zorica and Pomar, A. and Kuljanin Jakovljević, Jadranka and Stoiljković, Milovan and Nedeljković, Jovan and Šaponjić, Zoran", year = "2014", abstract = "Hydrothermal synthetic route for synthesis of Ni2+ doped TiO2 nanocrystals showing room temperature ferromagnetism, using dispersion of titania nanotubes in the presence of Ni2+ ions at different pHs as precursors, is reported. Morphologies of tubular precursors and Ni2+ doped TiO2 nanocrystals were characterized by transmission electron microscopy. Titania nanotubes have outer diameter of about 10 nm while the length varies widely even reaching few hundred nanometers. Ni2+ doped TiO2 nanoparticles synthesized at pH 3 have polygonal shape and dimension of about 20 nm. Transmission electron microscopy analysis revealed presence of mixed shapes (polygonal and rod like) in the sample of Ni2+ doped TiO2 nanoparticles synthesized at pH 5. X-ray diffraction analysis of resultant powder and selected area electron diffraction pattern confirmed the anatase crystal phase of Ni2+ doped TiO2 nanoparticles independently of dopant concentrations (0.09, 0.25, 0.86, 1.48 and 1.80 at%), followed by slight changes of their microstructural parameters. Reflection spectra of Ni2+ doped TiO2 nanoparticles revealed their altered optical properties in comparison to undoped TiO2 nanoparticles. Room temperature ferromagnetic ordering with saturation magnetic moment in the range of 10(-3)-5 x 10(-2) mu B per Ni atom was observed for all measured films made of Ni2+ doped TiO2 nanoparticles.", journal = "Journal of Alloys and Compounds", title = "Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors", pages = "47-42", volume = "589", doi = "10.1016/j.jallcom.2013.11.163", url = "conv_481" }
Vranješ, M., Konstantinović, Z., Pomar, A., Kuljanin Jakovljević, J., Stoiljković, M., Nedeljković, J.,& Šaponjić, Z.. (2014). Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors. in Journal of Alloys and Compounds, 589, 42-47. https://doi.org/10.1016/j.jallcom.2013.11.163 conv_481
Vranješ M, Konstantinović Z, Pomar A, Kuljanin Jakovljević J, Stoiljković M, Nedeljković J, Šaponjić Z. Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors. in Journal of Alloys and Compounds. 2014;589:42-47. doi:10.1016/j.jallcom.2013.11.163 conv_481 .
Vranješ, Mila, Konstantinović, Zorica, Pomar, A., Kuljanin Jakovljević, Jadranka, Stoiljković, Milovan, Nedeljković, Jovan, Šaponjić, Zoran, "Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors" in Journal of Alloys and Compounds, 589 (2014):42-47, https://doi.org/10.1016/j.jallcom.2013.11.163 ., conv_481 .