Adsorption of Sodium Dodecyl Sulfate to Colloidal Titanium Dioxide: An Electrophoretic Fingerprinting Investigation

Yezek, Lee P.; Rowell, Robert L.; Hołysz, Lucyna; Chibowski, Emil

doi:10.1006/jcis.2000.6753

Cited by 15 publications

(7 citation statements)

References 21 publications

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“…In our previous paper, it was found that, to some extent, SDS adsorbed to the TiO 2 surface also above pH pzc , i.e., on the negatively charged surface, which had to be due to nonelectrostatic interactions between the surfactant and the solid surface. Because, on a hydrolyzed CaCO 3 surface, some OH groups also are present, one may expect that a similar adsorption mechanism of SDS occurs, or the surface calcium dodecylsufate can form.…”

Section: Discussionmentioning

confidence: 91%

Influence of Sodium Dodecyl Sulfate and Static Magnetic Field on the Properties of Freshly Precipitated Calcium Carbonate

2005

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Properties of calcium carbonate precipitated from aqueous solutions of CaCl(2) and Na(2)CO(3) in the presence of sodium dodecyl sulfate (SDS) and S-S 0.1 T magnetic field (MF) were studied. The nucleation and precipitation processes of CaCO(3) were investigated by pH and zeta potential measurements at 20 +/- 1 degrees C up to 2 h after mixing the solutions. Also the amounts of calcium carbonate deposited on the glass surfaces and its structure were examined. It was found that SDS influences the kinetics of precipitation, crystallographic forms, and crystal size of CaCO(3). The SDS effects are more pronounced in MF presence. A small amount of SDS accelerates transformation of vaterite into calcite, whereas increasing surfactant concentration moderates such a transformation. On the other hand, in all the systems, MF in the presence of SDS causes a slower transformation of vaterite into calcite. These effects are reflected in pH and zeta potential changes, although there is no clear dependence between the SDS amount present during the precipitation and changes of the parameters investigated. It seems that MF effect is most significant at a defined optimal SDS concentration. The results, however, do not allow suggestion of any detailed mechanism of the field interaction.

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Section: Discussionmentioning

confidence: 91%

Influence of Sodium Dodecyl Sulfate and Static Magnetic Field on the Properties of Freshly Precipitated Calcium Carbonate

2005

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“…1) over a wide range of pH. At the same time, titanate nanotubes and TiO 2 nanoparticles (P25) suspended in aqueous media develop a zeta potential, which is negative for nanotubes [21] and positive for nanoparticles (isoelectric point is 6.5 [32] ) at pH values in the range from 4 to 5. When the sign of the charge between dye and adsorbent is different it results in more favourable adsorption, compared to when both adsorbent and adsorptive have the same sign of charge.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Ionic Charge on the Adsorption of Organic Dyes onto Titanate Nanotubes

et al. 2010

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The adsorption of dye molecules from aqueous solution onto the surface of titanate nanotubes (which have been synthesized via an alkaline hydrothermal treatment) has been studied. The ionic charge on the dye molecules was found to affect their ability to adsorb onto the titanate nanotube surface. In the case of (cationic) methylene blue, the adsorption was preferable on the negatively charged surface of titanate nanotubes rather than on positively charged P25 TiO 2 nanoparticles. In the case of (anionic) Eriochrome Black T dye, the opposite trend was found. Herein, the dynamics of dye adsorption and the effect of pH on the adsorption capacity are considered.

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“…Dispersions of metal oxides containing sodium dodecylsulfate (SDS) have been extensively studied by different methods [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The specific adsorption of dodecylsulfate anions results in a reversal of the sign of the ζ potential of metal oxide particles from positive to negative in the acidic range.…”

Section: Introductionmentioning

confidence: 99%

Dispersions of Metal Oxides in the Presence of Anionic Surfactants

Ruchomski

Mączka

Kosmulski

2018

Colloids and Interfaces

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We studied the behavior of dilute dispersions of nanoparticles of hematite, alumina, and titania in the presence of various concentrations of very pure sodium dodecyl-, tetradecyl-, and hexadecylsulfate. The concentrations studied were up to critical micelle concentration (CMC) for sodium dodecylsulfate, and up to the solubility limit in case of sodium tetradecyl- and hexadecylsulfate. The dispersions were adjusted to different pH (3–11), and 10−3 M NaCl was used as the supporting electrolyte. The solid-to-liquid ratio was strictly controlled in all dispersions, and the behavior of fresh dispersions was compared with dispersions aged for up to eight days. The presence of very low concentrations of ionic surfactants had rather insignificant effects on the ζ potentials of the particles. At sufficient concentrations of ionic surfactants the isoelectric point (IEP) of metal oxides shifted to low pH, and the long-chain surfactants were more efficient in shifting the IEP than their shorter-chain analogues. Once the surfactant concentration reached a critical value, the ζ potentials of the particles reached a pH-independent negative value, which did not change on further increase in the surfactant concentration and/or aging of the dispersion. This critical concentration increases with the solid-to-liquid ratio, and it is rather consistent (for certain oxides and certain surfactants) when it is expressed as the amount of surfactant per unit of surface area. Surprisingly, the surfactant-stabilized dispersions always showed a substantial degree of aggregation; that is, the particle size observed in dispersions by dynamic light scattering was higher than the size of particles observed in dry powders by electron microscopy. Apparently, in spite of relatively high ζ potentials (about 60 mV in absolute value), the surfactant-stabilized dispersions consist of aggregates rather than of primary particles, and in certain dispersions the high concentration of surfactant seems to induce aggregation rather than prevent it.

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Adsorption of Sodium Dodecyl Sulfate to Colloidal Titanium Dioxide: An Electrophoretic Fingerprinting Investigation

Cited by 15 publications

References 21 publications

Influence of Sodium Dodecyl Sulfate and Static Magnetic Field on the Properties of Freshly Precipitated Calcium Carbonate

Influence of Sodium Dodecyl Sulfate and Static Magnetic Field on the Properties of Freshly Precipitated Calcium Carbonate

The Effect of Ionic Charge on the Adsorption of Organic Dyes onto Titanate Nanotubes

Dispersions of Metal Oxides in the Presence of Anionic Surfactants

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