Carboxyl-Functionalized Task-Specific Ionic Liquids for Solubilizing Metal Oxides

Nockemann, Peter; Thijs, Ben; Parac‐Vogt, Tatjana N.; Hecke, Kristof Van; Meervelt, Luc Van; Tinant, Bernard; Hartenbach, Ingo; Schleid, Thomas; Ngân, Vũ Thị; Nguyen, Minh Tho; Binnemans, Koen

doi:10.1021/ic801213z

Cited by 235 publications

(204 citation statements)

References 69 publications

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“…15 Thus, some task-specific solvents have been investigated to dissolve metal oxides. Binnemans et al 16,17 15 ZnO showed a high solubility in urea/choline chloride eutectics (8466 ppm), which was higher than that reported for the NaCl-KCl system at 973 K (only 27.6 ppm). In ZnO-urea/ choline chloride system, the species [ZnClO.urea] ¹ was discovered as dominated anions and no other zinc-containing clusters have been observed in this system.…”

Section: Introductionmentioning

confidence: 74%

Zinc Electrodeposition from Zinc Oxide in the Urea/1-ethyl-3-methylimidazolium Chloride at 353 K

Shen

Shi

et al. 2016

Electrochemistry

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In this study, a new electrolyte urea/1-ethyl-3-methylimidazolium chloride was developed to replace traditional sulfuric acid in the zinc electroplating process using zinc oxide as a zinc source. The electrochemical behavior of zinc from zinc oxide was investigated in the urea/1-ethyl-3-methylimidazolium chloride electrolyte using chronoamperometric and cyclic voltammetric techniques. The cyclic voltammograms for this electrolyte illustrated that the zinc reduction is a diffusion-controlled irreversible process via a single-step two-electron transfer procedure. Chronoamperometric measurements suggested that the zinc electrodeposition on a tungsten electrode followed a three-dimensional instantaneous nucleation with a diffusion-controlled growth model at 353 K. Electrodeposits from Chronoamperometric measurements were analyzed with various characterization techniques. SEM images show that electrodeposits were flakes-like at low cathodic potentials and became clusters at more negative cathodic potentials. The obtained electrodeposits are metallic zinc, confirmed by XRD and EDS.

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Section: Introductionmentioning

confidence: 74%

Zinc Electrodeposition from Zinc Oxide in the Urea/1-ethyl-3-methylimidazolium Chloride at 353 K

Shen

Shi

et al. 2016

Electrochemistry

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“…Only limited papers about the higher concentration of the lanthanide ions in ionic liquid have been reported. 12,15,[17][18][19] Incorporating lanthanide ions as an anion into ionic liquids is an effective way to increase the concentration of lanthanides. 13,14,16 An alternative approach to increase the solubility of metal salts is to use task-specific ionic liquids (TSIL) bearing a complexing moiety.…”

Section: -15mentioning

confidence: 99%

The Soft Material Obtained from an Europium (III)-Containing Ionic Liquid

Shao¹,

Wang²,

Li³

2011

Bulletin of the Korean Chemical Society

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The addition of organic ligand (β-diketone or heterocyclic compound) to the europium (III)-containing ionic liquid resulted in bright luminescent soft materials with the molar ratio of europium/ionic liquid (IL)/ligand being 1:3:1 that exhibit bright red light under UV lamp. The luminescent properties such as emission features and lifetime of 5 D0 Eu3+ excited level are dependent on the organic ligands. The materials were characterized by FT-IR and luminescence spectroscopy. The data shows that at least parts of the ILs (carboxylic acid) are replaced with β-diketone ligand rather than the formation of europium complex with the molar ratio of Eu 3+ : IL: ligand being 1:3:1, while no ILs could be replaced by the heterocyclic ligand such as Bpy and Phen.

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“…[15][16][17][18][19] This usally occurs at high acid conditions (low pH) and high chloride concentrations. 20 [25][26][27] of the IL. Regeneration of these functionalized IL is mainly done by reducing the metal interaction of the functionality due to protonation or oxidation, which can also be achieved with weaker acids and/or bases.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of the ionic liquid tetraoctylammonium oleate after metal extraction

Parmentier

Valia²,

Metz³

et al. 2015

Hydrometallurgy

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Ionic liquids (ILs) have been presented as suitable candidates for metal extraction in the hydrometallurgy. It has already been proven that they have an adjustable selectivity towards metal ions. However, industrial applications of ILs are limited due to their high price.Therefore, regeneration of ILs is necessary. In this study the regeneration of the fatty acid based IL tetraoctylammonium oleate was investigated, because in a previous study we obtained excellent metal salt extraction efficiencies with this benign IL. Several methods for regeneration were investigated, i.e. electro-deposition and chemical regeneration. Electrodeposition turned out to be unfeasible for this IL. Chemical regeneration showed that the metal ions (Zn, Co and Mn) can be selectively back-extracted, so that metals can also be separated from each other in this step. The best stripping solution was aqueous sodium oxalate, which allowed the IL to be immediately reused.

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Carboxyl-Functionalized Task-Specific Ionic Liquids for Solubilizing Metal Oxides

Cited by 235 publications

References 69 publications

Zinc Electrodeposition from Zinc Oxide in the Urea/1-ethyl-3-methylimidazolium Chloride at 353 K

Zinc Electrodeposition from Zinc Oxide in the Urea/1-ethyl-3-methylimidazolium Chloride at 353 K

The Soft Material Obtained from an Europium (III)-Containing Ionic Liquid

Regeneration of the ionic liquid tetraoctylammonium oleate after metal extraction

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