Growth of hematite nanowire arrays during dense pentlandite oxidation
Article
Article Title | Growth of hematite nanowire arrays during dense pentlandite oxidation |
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ERA Journal ID | 201058 |
Article Category | Article |
Authors | Zhu, Huihui (Author), Deng, Jinxia (Author), Chen, Jun (Author), Yu, Ranbo (Author) and Xing, Xianran (Author) |
Journal Title | Journal of Materials Chemistry A |
Journal Citation | 2 (9), pp. 3008-3014 |
Number of Pages | 7 |
Year | 2014 |
Publisher | The Royal Society of Chemistry |
Place of Publication | United Kingdom |
ISSN | 2050-7488 |
2050-7496 | |
Digital Object Identifier (DOI) | https://doi.org/10.1039/c3ta14832g |
Web Address (URL) | http://pubs.rsc.org/en/Content/ArticleLanding/2014/TA/c3ta14832g#!divAbstract |
Abstract | A simple synthesis method is proposed for producing aligned and uniform single-crystal one-dimensional hematite (α-Fe2O3) nanostructures on pentlandite. Pentlandite is the most common terrestrial iron-nickel sulfide and the principal ore mineral of nickel. In this study, a pentlandite sample was synthesized from pure components Fe, Ni and S. Oxidation makes the chemical potential of iron reduce more than that of nickel. Iron migrated rapidly to the surface of dense pentlandite and was oxidized preferentially to form an oxide layer. Several micrometers long α-Fe 2O3 nanowires grown along the [110] direction were achieved. The ordered oxygen vacancies which lie parallel to the growth direction were observed. Hematite (α-Fe2O3) and magnetite including Ni (NixFe3-xO4) are major components of the oxide layer. Three kinds of morphology are included in this layer: nanowires, dense and porous oxides. The Ni-rich pentlandite coexists with NiS, hexagonal pyrrhotite (Fe1-xS) and/or godlevskite (Ni 7S6). This work provides a new strategy to inexpensively and efficiently synthesize nanostructures directly from ore minerals. |
Keywords | growth directions; iron-nickel; nanowire arrays; ore minerals; porous oxides; pure components; synthesis method; minerals; iron; nickel; nanotechnology; chemical reactions; solid state physics |
ANZSRC Field of Research 2020 | 340399. Macromolecular and materials chemistry not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Science and Technology Beijing, China |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q426y/growth-of-hematite-nanowire-arrays-during-dense-pentlandite-oxidation
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