Top-down surfactant-free electrosynthesis of magnéli phase Ti<sub>9</sub>O<sub>17</sub> nanowires
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Date
2024-03-18
Authors
Schneider, Peter M.
Schott, Christian M.
Maier, Dominic
Watzele, Sebastian
Michalička, Jan
Rodriguez Pereira, Jhonatan
Hromádko, Luděk
Macák, Jan
Baran, Volodymyr
Senyshyn, Anatoliy
0000-0001-6231-0061Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Royal Society of Chemistry
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Abstract
TiO2 nanowires have proven their importance as a versatile material in numerous fields of technology due to their unique properties attributable to their high aspect ratio and large surface area. However, synthesis is an enormous challenge since state-of-the-art techniques rely on complex, multi-stage procedures with expensive, specialized equipment, employing high-temperature steps and potentially toxic precursor materials and surfactants. Hence, we elucidate a simple and facile top-down methodology for the synthesis of nanowires with non-stoichiometric Magn & eacute;li phase Ti9O17. This methodology relies on the electrochemical erosion of bulk Ti wires immersed in an aqueous electrolyte, circumventing the use of environmentally harmful precursors or surfactants, eliminating the need for high temperatures, and reducing synthesis complexity and time. Using multiple techniques, including transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction, we provide evidence of the successful synthesis of ultrathin nanowires with the crystal structure of non-stoichiometric Ti9O17 Magn & eacute;li phase. The nanowire width of similar to 5 nm and the Brunauer-Emmett-Teller surface area of similar to 215 m(2) g(-1) make the nanowires presented in this work comparable to those synthesized by state-of-the-art bottom-up techniques.
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Citation
Materials Advances. 2024, vol. 6, issue 5, p. 2368-2376.
https://pubs.rsc.org/en/content/articlelanding/2024/ma/d3ma00968h
https://pubs.rsc.org/en/content/articlelanding/2024/ma/d3ma00968h
Document type
Peer-reviewed
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Published version
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en