TY  - JOUR
AU  - Krehula, Stjepko
AU  - Ristić, Mira
AU  - Mitar, Ivana
AU  - Wu, Chuchu
AU  - Li, Xuning
AU  - Jiang, Luhua
AU  - Wang, Junhu H.
AU  - Sun, Gongquan
AU  - Zhang, Tao
AU  - Perović, Marija M.
AU  - Bošković, Marko
AU  - Antić, Bratislav
AU  - Musić, Svetozar
PY  - 2018
UR  - https://hrcak.srce.hr/file/309798
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8100
AB  - Ni-doped goethite (α-FeOOH) nanorods were synthesized from mixed Fe(III)-Ni(II) nitrate solutions with various Ni/(Ni+Fe) ratios (0, 5, 10, 20, 33 and 50 mol % Ni) by hydrothermal precipitation in a highly alkaline medium using the strong organic alkali, tetramethylammonium hydroxide (TMAH). Ni-doped hematite (α-Fe2O3) nanorods were obtained by calcination of Ni-doped goethite nanorods at 400 °C. The Ni 2+ -for-Fe 3+ substitution in goethite and hematite was confirmed by determination of the unit cell expansion (due to the difference in the ionic radii of Fe 3+ and Ni 2+ ) using XRPD and determination of the reduction of a hyperfine magnetic field (due to the difference in magnetic moments of Fe 3+ and Ni 2+ ) using Mössbauer spectroscopy. Single-phase goethite nanorods were found in samples containing 0 or 5 mol % Ni. A higher Ni content in the precipitation system (10 mol % or more) resulted in a higher Ni 2+ -for-Fe 3+ substitution in goethite, and larger Ni-doped goethite nanorods, though with the presence of low crystalline Ni-containing ferrihydrite and Ni ferrite (NiFe2O4) as additional phases. Significant changes in FT-IR and UV-Vis-NIR spectra of prepared samples were observed with increasing Ni content. Electrochemical measurements of samples showed a strong increase in oxygen evolution reaction (OER) electrocatalytic activity with increasing Ni content. © 2018 Croatian Chemical Society. All Rights Reserved.
T2  - Croatica Chemica Acta
T1  - Synthesis and Properties of Ni-doped Goethite and Ni-doped Hematite Nanorods
VL  - 91
IS  - 3
SP  - 389
EP  - 401
DO  - 10.5562/cca3402
ER  - 

@article{
author = "Krehula, Stjepko and Ristić, Mira and Mitar, Ivana and Wu, Chuchu and Li, Xuning and Jiang, Luhua and Wang, Junhu H. and Sun, Gongquan and Zhang, Tao and Perović, Marija M. and Bošković, Marko and Antić, Bratislav and Musić, Svetozar",
year = "2018",
abstract = "Ni-doped goethite (α-FeOOH) nanorods were synthesized from mixed Fe(III)-Ni(II) nitrate solutions with various Ni/(Ni+Fe) ratios (0, 5, 10, 20, 33 and 50 mol % Ni) by hydrothermal precipitation in a highly alkaline medium using the strong organic alkali, tetramethylammonium hydroxide (TMAH). Ni-doped hematite (α-Fe2O3) nanorods were obtained by calcination of Ni-doped goethite nanorods at 400 °C. The Ni 2+ -for-Fe 3+ substitution in goethite and hematite was confirmed by determination of the unit cell expansion (due to the difference in the ionic radii of Fe 3+ and Ni 2+ ) using XRPD and determination of the reduction of a hyperfine magnetic field (due to the difference in magnetic moments of Fe 3+ and Ni 2+ ) using Mössbauer spectroscopy. Single-phase goethite nanorods were found in samples containing 0 or 5 mol % Ni. A higher Ni content in the precipitation system (10 mol % or more) resulted in a higher Ni 2+ -for-Fe 3+ substitution in goethite, and larger Ni-doped goethite nanorods, though with the presence of low crystalline Ni-containing ferrihydrite and Ni ferrite (NiFe2O4) as additional phases. Significant changes in FT-IR and UV-Vis-NIR spectra of prepared samples were observed with increasing Ni content. Electrochemical measurements of samples showed a strong increase in oxygen evolution reaction (OER) electrocatalytic activity with increasing Ni content. © 2018 Croatian Chemical Society. All Rights Reserved.",
journal = "Croatica Chemica Acta",
title = "Synthesis and Properties of Ni-doped Goethite and Ni-doped Hematite Nanorods",
volume = "91",
number = "3",
pages = "389-401",
doi = "10.5562/cca3402"
}

Krehula, S., Ristić, M., Mitar, I., Wu, C., Li, X., Jiang, L., Wang, J. H., Sun, G., Zhang, T., Perović, M. M., Bošković, M., Antić, B.,& Musić, S.. (2018). Synthesis and Properties of Ni-doped Goethite and Ni-doped Hematite Nanorods. in Croatica Chemica Acta, 91(3), 389-401.
https://doi.org/10.5562/cca3402

Krehula S, Ristić M, Mitar I, Wu C, Li X, Jiang L, Wang JH, Sun G, Zhang T, Perović MM, Bošković M, Antić B, Musić S. Synthesis and Properties of Ni-doped Goethite and Ni-doped Hematite Nanorods. in Croatica Chemica Acta. 2018;91(3):389-401.
doi:10.5562/cca3402 .

Krehula, Stjepko, Ristić, Mira, Mitar, Ivana, Wu, Chuchu, Li, Xuning, Jiang, Luhua, Wang, Junhu H., Sun, Gongquan, Zhang, Tao, Perović, Marija M., Bošković, Marko, Antić, Bratislav, Musić, Svetozar, "Synthesis and Properties of Ni-doped Goethite and Ni-doped Hematite Nanorods" in Croatica Chemica Acta, 91, no. 3 (2018):389-401,
https://doi.org/10.5562/cca3402 . .

TY  - JOUR
AU  - Krehula, Stjepko
AU  - Ristić, Mira
AU  - Wu, Chuchu
AU  - Li, Xuning
AU  - Jiang, Luhua
AU  - Wang, Junhu H.
AU  - Sun, Gongquan
AU  - Zhang, Tao
AU  - Perović, Marija M.
AU  - Bošković, Marko
AU  - Antić, Bratislav
AU  - Kratofil Krehula, Ljerka
AU  - Kobzi, Balazs
AU  - Kubuki, Shiro
AU  - Musić, Svetozar
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0925838818313197
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7744
AB  - This paper systematically examines the influence of the level of Fe(III) doping on the crystal structure and other properties of Ni(OH)(2). Reference beta-Ni(OH)(2) and Fe-doped Ni(OH)(2) samples were synthesized by hydrothermal precipitation of mixed Ni(II) and Fe(III) nitrate aqueous solutions in a highly alkaline medium. The samples were investigated using X-ray powder diffraction (XRPD), scanning and transmission electron microscopy (FE-SEM and TEM), energy dispersive X-ray spectroscopy (EDS), Mossbauer spectroscopy, magnetic measurements, Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy, thermogravimetric analysis (TGA) and electrochemical measurements. Incorporation of Fe in beta-Ni(OH)(2) by cation substitution was confirmed from the shifts in position of XRPD lines due to the difference in the ionic radius of Fe3+ and Ni-2. The Fe-3-for-Ni2+ substitution in beta-Ni(OH)(2) caused formation of an interstratifled structure with beta-Ni(OH)(2) and alpha-Ni(OH)(2) structural units interconnected within the same structural layers and crystallites. Mossbauer spectra revealed the presence of Fe3+ ions in highly distorted octahedral sites, presumably at the boundary between the alpha-Ni(OH)(2) and beta-Ni(OH)(2) structural units within the same structural layer. Electrochemical measurements showed significant increase in oxygen evolution reaction (OER) catalytic activity of Fe-doped Ni(OH)(2) compared to pure phase. (C) 2018 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures
VL  - 750
SP  - 687
EP  - 695
DO  - 10.1016/j.jallcom.2018.04.032
ER  - 

@article{
author = "Krehula, Stjepko and Ristić, Mira and Wu, Chuchu and Li, Xuning and Jiang, Luhua and Wang, Junhu H. and Sun, Gongquan and Zhang, Tao and Perović, Marija M. and Bošković, Marko and Antić, Bratislav and Kratofil Krehula, Ljerka and Kobzi, Balazs and Kubuki, Shiro and Musić, Svetozar",
year = "2018",
abstract = "This paper systematically examines the influence of the level of Fe(III) doping on the crystal structure and other properties of Ni(OH)(2). Reference beta-Ni(OH)(2) and Fe-doped Ni(OH)(2) samples were synthesized by hydrothermal precipitation of mixed Ni(II) and Fe(III) nitrate aqueous solutions in a highly alkaline medium. The samples were investigated using X-ray powder diffraction (XRPD), scanning and transmission electron microscopy (FE-SEM and TEM), energy dispersive X-ray spectroscopy (EDS), Mossbauer spectroscopy, magnetic measurements, Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy, thermogravimetric analysis (TGA) and electrochemical measurements. Incorporation of Fe in beta-Ni(OH)(2) by cation substitution was confirmed from the shifts in position of XRPD lines due to the difference in the ionic radius of Fe3+ and Ni-2. The Fe-3-for-Ni2+ substitution in beta-Ni(OH)(2) caused formation of an interstratifled structure with beta-Ni(OH)(2) and alpha-Ni(OH)(2) structural units interconnected within the same structural layers and crystallites. Mossbauer spectra revealed the presence of Fe3+ ions in highly distorted octahedral sites, presumably at the boundary between the alpha-Ni(OH)(2) and beta-Ni(OH)(2) structural units within the same structural layer. Electrochemical measurements showed significant increase in oxygen evolution reaction (OER) catalytic activity of Fe-doped Ni(OH)(2) compared to pure phase. (C) 2018 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures",
volume = "750",
pages = "687-695",
doi = "10.1016/j.jallcom.2018.04.032"
}

Krehula, S., Ristić, M., Wu, C., Li, X., Jiang, L., Wang, J. H., Sun, G., Zhang, T., Perović, M. M., Bošković, M., Antić, B., Kratofil Krehula, L., Kobzi, B., Kubuki, S.,& Musić, S.. (2018). Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures. in Journal of Alloys and Compounds, 750, 687-695.
https://doi.org/10.1016/j.jallcom.2018.04.032

Krehula S, Ristić M, Wu C, Li X, Jiang L, Wang JH, Sun G, Zhang T, Perović MM, Bošković M, Antić B, Kratofil Krehula L, Kobzi B, Kubuki S, Musić S. Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures. in Journal of Alloys and Compounds. 2018;750:687-695.
doi:10.1016/j.jallcom.2018.04.032 .

Krehula, Stjepko, Ristić, Mira, Wu, Chuchu, Li, Xuning, Jiang, Luhua, Wang, Junhu H., Sun, Gongquan, Zhang, Tao, Perović, Marija M., Bošković, Marko, Antić, Bratislav, Kratofil Krehula, Ljerka, Kobzi, Balazs, Kubuki, Shiro, Musić, Svetozar, "Influence of Fe(III) doping on the crystal structure and properties of hydrothermally prepared β-Ni(OH) 2 nanostructures" in Journal of Alloys and Compounds, 750 (2018):687-695,
https://doi.org/10.1016/j.jallcom.2018.04.032 . .