Study of the surface ionization of kaolinite in water by zetametry—Influence on the rheological properties of kaolinite suspension

Siffert, Bernard; Kim, Kyung-Bae

doi:10.1016/0169-1317(92)90004-7

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…When kaolinite was used as an electrode modier (GCE/K), no signal was observed, indicating that it does not accumulate iodide quantitatively because of its very low anion exchange capacity. 46 These results demonstrate spectacularly that the graing of BHIC in the interlayer of kaolinite provides anion exchange properties to this material and can also considerably improve the detection limit of iodide. In order to optimize these results, the effects of the pre-concentration time and of the pH of the electrolytic solution were studied.…”

mentioning

confidence: 78%

Ionic liquid–kaolinite nanohybrid materials for the amperometric detection of trace levels of iodide

Dedzo

Detellier

2013

Analyst

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A nanohybrid kaolinite material with anion exchange properties was obtained by the grafting of an ionic liquid in the interlayer spaces of kaolinite. It was used successfully for the amperometric detection of iodide in aqueous solution and tap water after a pre-concentration step, with a detection limit of 1.5 × 10(-7) M. This electrode has an excellent stability. Its selectivity was tested in the presence of several anions.

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mentioning

confidence: 78%

Ionic liquid–kaolinite nanohybrid materials for the amperometric detection of trace levels of iodide

Dedzo

Detellier

2013

Analyst

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Section: Electroanalysis Of Anionsmentioning

confidence: 99%

“…With the electrode modified by pure kaolinite, there is a weak signal due to the natural anionic exchange capacity of kaolinite, [53][54][55][56] mainly due to acid-base properties of Al-OH, located at the edge of the kaolinite aggregates. [55][56][57] Moreover, similar trends were observed for all anions studied. With the grafted kaolinites, there is an increase in signal intensities much more important for K-AE3-W than for K-AE2-W (I/I BGC of 1.71 and 1.43 respectively).…”

Section: Electroanalysis Of Anionsmentioning

confidence: 99%

Kaolinite–ionic liquid nanohybrid materials as electrochemical sensors for size-selective detection of anions

2012

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“…The gain in intensity reflects the affinity of the film for Fe(CN) 6 3− and confirms that this anion can be intercalated into the modified interlayer space of kaolinite [ 21 ]. On GCE/K, there was a significant decrease in current intensities, a result expected, considering the poor anion exchange capacity of pristine kaolinite [ 34 , 35 , 36 , 37 ]. The signal observed was mainly due to the irregularity of the film at the surface of the electrode.…”

Section: Resultsmentioning

confidence: 71%

Characterization and Applications of Kaolinite Robustly Grafted by an Ionic Liquid with Naphthyl Functionality

Dedzo

Detellier

2017

Materials

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Functionalization of the kaolinite (K) interlayer space is challenging. In this work, a new kaolinite-based nanohybridmaterial (K-NI) was successfully synthesized by grafting on the interlayer aluminol surfaces the ionic liquid, 1-(1-methylnaphthyl)-3-(2-hydroxyethyl) imidazolium chloride (NI), using a guest displacement strategy. A substantial increase of the basal spacing (10.8 Å) was obtained. This is a grafted derivative of kaolinite possessing one of the largest d-values. Washing in water for several days and other vigorous treatments such as sonication showed a minor effect on the integrity of the material. FTIR and 13C NMR confirmed the conservation of the structure of the ionic liquid after the grafting. Thermal analysis confirmed the presence of grafted material and was used to estimate the abundance of the grafted ionic liquid (0.44 mole per mole of kaolinite structural formula, (Al2Si2O5(OH)4)). By using cyclic voltammetry, the permeability of a film of K-NI for the bulky ferricyanide ions was demonstrated. The accumulation of nitrophenolate anions was effective (maximum capacity of 190 μmol/g), but was less important than what was expected due to the steric hindrance of the bulky grafted NI. Although the presence of chloride anions reduced the adsorption capacity, the affinity of the modified kaolinite interlayer space for the nitrophenolate anions was demonstrated.

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Study of the surface ionization of kaolinite in water by zetametry—Influence on the rheological properties of kaolinite suspension

Cited by 13 publications

References 4 publications

Ionic liquid–kaolinite nanohybrid materials for the amperometric detection of trace levels of iodide

Ionic liquid–kaolinite nanohybrid materials for the amperometric detection of trace levels of iodide

Kaolinite–ionic liquid nanohybrid materials as electrochemical sensors for size-selective detection of anions

Characterization and Applications of Kaolinite Robustly Grafted by an Ionic Liquid with Naphthyl Functionality

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