Synthesis and Properties of Ni-doped Goethite and Ni-doped Hematite Nanorods
Authors
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

Article (Published version)
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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.
Keywords:
alpha-FeOOH / alpha-Fe2O3 / Ni doping / XRPD / Mossbauer spectroscopy / FE-SEM / OERSource:
Croatica Chemica Acta, 2018, 91, 3, 389-401Funding / projects:
- Croatian Science Foundation [IP-2016-06-825]
- SAFU [KK.01.1.1.01.0001]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09030104]
- Natural Science Foundation of China [21576258]
- Natural Science Foundation of China [21476232]
- Bilateral Croatian-Chinese scientific project “Iron oxide nanostructures for environmental and energy applications”
- Bilateral Croatian-Serbian scientific project “Nanostructured iron oxides for environmental applications”
DOI: 10.5562/cca3402
ISSN: 0011-1643; 1334-417X
WoS: 000456043500011
Scopus: 2-s2.0-85062707409
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VinčaTY - 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 . .