Volume 30 Issue 5
May  2023
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Shanshan Liu, Shaolong Li, Chenhui Liu, Jilin He, and Jianxun Song, Effect of fluoride ions on coordination structure of titanium inmolten NaCl–KCl, Int. J. Miner. Metall. Mater., 30(2023), No. 5, pp. 868-876. https://doi.org/10.1007/s12613-022-2527-z
 Cite this article as: Shanshan Liu, Shaolong Li, Chenhui Liu, Jilin He, and Jianxun Song, Effect of fluoride ions on coordination structure of titanium inmolten NaCl–KCl, Int. J. Miner. Metall. Mater., 30(2023), No. 5, pp. 868-876. https://doi.org/10.1007/s12613-022-2527-z

# Effect of fluoride ions on coordination structure of titanium inmolten NaCl–KCl

• Corresponding author:

Jianxun Song    E-mail: songjx00@163.com

• Received: 27 May 2022Revised: 12 July 2022Accepted: 13 July 2022Available online: 14 July 2022
• The effects of fluoride ions (F) on the electrochemical behavior and coordination properties of titanium ions (Tin+) were studied in this work, by combining electrochemical and mathematical analysis as well as spectral techniques. The α was taken as a factor to indicate the molar concentration ratio of F and Tin+. Cyclic voltammetry (CV), square wave voltammetry (SWV), and open circuit potential method (OCP) were used to study the electrochemical behavior of titanium ions under conditions of various α, and in-situ sampler was used to prepare molten salt samples when α equal to 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, and 8.0. And then, samples were analyzed by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The results showed that F in molten salt can reduce the reduction steps of titanium ions and greatly affects the proportion of valence titanium ions which making the high-valence titanium content increased and more stable. Ti2+ cannot be detected in the molten salt when α is higher than 3.0 and finally transferred to titanium ions with higher valence state. Investigation revealed that the mechanism behind those phenomenon is the coordination compounds ($\text{TiCl}_{j}\text{F}_{i}^{m-}$) forming.

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沈阳化工大学材料科学与工程学院 沈阳 110142

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