Vibrational and electron paramagnetic resonance spectroscopic studies of beta-MnO2 and alpha-KxMnO(2) nanorods
Само за регистроване кориснике
2017
Аутори
Barudžija, TanjaCvjetićanin, Nikola
Bajuk-Bogdanović, Danica V.
Mojovic, Milos
Mitrić, Miodrag
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Raman scattering (RS), Fourier transform infrared (FTIR) and electron paramagnetic resonance (EPR) spectroscopic measurements on beta-MnO2 and alpha-KxMnO2 nanorods were performed. The infrared spectrum of beta-MnO2 is sensitive towards the particle sizes, while the Raman spectrum is sensitive towards the presence of nonstoichiometric and disordered MnO2-delta on the surface of nanorods. EPR measurements show the appearance of two types of Mn4+ ions having different local environment: (i) Mn4+ ions in Mn4+-rich environment and (ii) Mn4+ ions in mixed-valence Mn4+/Mn3+ environment that match up with region of nonstoichiometric MnO2-delta. Observed bands in vibrational spectra of tetragonal hollanditetype alpha-KxMnO(2) are considered to be mainly due to the vibration modes of Mn-O frameworks. The EPR spectra of alpha-KxMnO(2) nanorods contain two signals that can be attributed to Mn4+ ions in Mn4+-rich environment and Mn4+ ions in mixed-valence Mn4+/Mn3+ environment close to K+ ions. (C...) 2017 Elsevier B.V. All rights reserved.
Кључне речи:
Manganese dioxide materials / Raman scattering spectroscopy / Infrared spectroscopy / Electron paramagnetic resonance / X-ray diffractionИзвор:
Journal of Alloys and Compounds, 2017, 728, 259-270Финансирање / пројекти:
- Магнетни и радионуклидима обележени наноструктурни материјали за примене у медицини (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
DOI: 10.1016/j.jallcom.2017.09.015
ISSN: 0925-8388; 1873-4669
WoS: 000412818600029
Scopus: 2-s2.0-85028743086
Колекције
Институција/група
VinčaTY - JOUR AU - Barudžija, Tanja AU - Cvjetićanin, Nikola AU - Bajuk-Bogdanović, Danica V. AU - Mojovic, Milos AU - Mitrić, Miodrag PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1777 AB - Raman scattering (RS), Fourier transform infrared (FTIR) and electron paramagnetic resonance (EPR) spectroscopic measurements on beta-MnO2 and alpha-KxMnO2 nanorods were performed. The infrared spectrum of beta-MnO2 is sensitive towards the particle sizes, while the Raman spectrum is sensitive towards the presence of nonstoichiometric and disordered MnO2-delta on the surface of nanorods. EPR measurements show the appearance of two types of Mn4+ ions having different local environment: (i) Mn4+ ions in Mn4+-rich environment and (ii) Mn4+ ions in mixed-valence Mn4+/Mn3+ environment that match up with region of nonstoichiometric MnO2-delta. Observed bands in vibrational spectra of tetragonal hollanditetype alpha-KxMnO(2) are considered to be mainly due to the vibration modes of Mn-O frameworks. The EPR spectra of alpha-KxMnO(2) nanorods contain two signals that can be attributed to Mn4+ ions in Mn4+-rich environment and Mn4+ ions in mixed-valence Mn4+/Mn3+ environment close to K+ ions. (C) 2017 Elsevier B.V. All rights reserved. T2 - Journal of Alloys and Compounds T1 - Vibrational and electron paramagnetic resonance spectroscopic studies of beta-MnO2 and alpha-KxMnO(2) nanorods VL - 728 SP - 259 EP - 270 DO - 10.1016/j.jallcom.2017.09.015 ER -
@article{ author = "Barudžija, Tanja and Cvjetićanin, Nikola and Bajuk-Bogdanović, Danica V. and Mojovic, Milos and Mitrić, Miodrag", year = "2017", abstract = "Raman scattering (RS), Fourier transform infrared (FTIR) and electron paramagnetic resonance (EPR) spectroscopic measurements on beta-MnO2 and alpha-KxMnO2 nanorods were performed. The infrared spectrum of beta-MnO2 is sensitive towards the particle sizes, while the Raman spectrum is sensitive towards the presence of nonstoichiometric and disordered MnO2-delta on the surface of nanorods. EPR measurements show the appearance of two types of Mn4+ ions having different local environment: (i) Mn4+ ions in Mn4+-rich environment and (ii) Mn4+ ions in mixed-valence Mn4+/Mn3+ environment that match up with region of nonstoichiometric MnO2-delta. Observed bands in vibrational spectra of tetragonal hollanditetype alpha-KxMnO(2) are considered to be mainly due to the vibration modes of Mn-O frameworks. The EPR spectra of alpha-KxMnO(2) nanorods contain two signals that can be attributed to Mn4+ ions in Mn4+-rich environment and Mn4+ ions in mixed-valence Mn4+/Mn3+ environment close to K+ ions. (C) 2017 Elsevier B.V. All rights reserved.", journal = "Journal of Alloys and Compounds", title = "Vibrational and electron paramagnetic resonance spectroscopic studies of beta-MnO2 and alpha-KxMnO(2) nanorods", volume = "728", pages = "259-270", doi = "10.1016/j.jallcom.2017.09.015" }
Barudžija, T., Cvjetićanin, N., Bajuk-Bogdanović, D. V., Mojovic, M.,& Mitrić, M.. (2017). Vibrational and electron paramagnetic resonance spectroscopic studies of beta-MnO2 and alpha-KxMnO(2) nanorods. in Journal of Alloys and Compounds, 728, 259-270. https://doi.org/10.1016/j.jallcom.2017.09.015
Barudžija T, Cvjetićanin N, Bajuk-Bogdanović DV, Mojovic M, Mitrić M. Vibrational and electron paramagnetic resonance spectroscopic studies of beta-MnO2 and alpha-KxMnO(2) nanorods. in Journal of Alloys and Compounds. 2017;728:259-270. doi:10.1016/j.jallcom.2017.09.015 .
Barudžija, Tanja, Cvjetićanin, Nikola, Bajuk-Bogdanović, Danica V., Mojovic, Milos, Mitrić, Miodrag, "Vibrational and electron paramagnetic resonance spectroscopic studies of beta-MnO2 and alpha-KxMnO(2) nanorods" in Journal of Alloys and Compounds, 728 (2017):259-270, https://doi.org/10.1016/j.jallcom.2017.09.015 . .