Temperature dependence of the electrical double layer on oxides: Rutile and hematite

L. G.J. Fokkink; A. de Keizer; J. Lyklema

doi:10.1016/0021-9797(89)90012-X

Temperature dependence of the electrical double layer on oxides: Rutile and hematite

L. G.J. Fokkink
, A. de Keizer
, J. Lyklema

Research output: Contribution to journal › Article › Research › peer-review

176 Citations (Scopus)

Abstract

The surface charge σ₀ on aqueous suspensions of hematite and rutile was measured as a function of pH in various KNO₃ concentrations and at different temperatures. Two types of congruences were observed: (a) if σ₀ is plotted as a function of the pH minus the pzc, curves on these two oxides coincide at the same KNO₃ concentrations and (b) the same is observed for σ₀ as a function of temperature. Thermodynamic analysis enabled us to separate double layer parameters into oxide-specific and generic contributions. Standard Gibbs energies, enthalpies, and entropies for proton adsorption were obtained.

Original language	English
Pages (from-to)	116-131
Number of pages	16
Journal	Journal of Colloid and Interface Science
Volume	127
Issue number	1
DOIs	https://doi.org/10.1016/0021-9797(89)90012-X
Publication status	Published - 1 Jan 1989
Externally published	Yes

Access to Document

10.1016/0021-9797(89)90012-X

Cite this

@article{ed84fd31d36545e9952146072e31015b,

title = "Temperature dependence of the electrical double layer on oxides: Rutile and hematite",

abstract = "The surface charge σ0 on aqueous suspensions of hematite and rutile was measured as a function of pH in various KNO3 concentrations and at different temperatures. Two types of congruences were observed: (a) if σ0 is plotted as a function of the pH minus the pzc, curves on these two oxides coincide at the same KNO3 concentrations and (b) the same is observed for σ0 as a function of temperature. Thermodynamic analysis enabled us to separate double layer parameters into oxide-specific and generic contributions. Standard Gibbs energies, enthalpies, and entropies for proton adsorption were obtained.",

author = "Fokkink, \{L. G.J.\} and \{de Keizer\}, A. and J. Lyklema",

year = "1989",

month = jan,

day = "1",

doi = "10.1016/0021-9797(89)90012-X",

language = "English",

volume = "127",

pages = "116--131",

journal = "Journal of Colloid and Interface Science",

issn = "0021-9797",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Temperature dependence of the electrical double layer on oxides

T2 - Rutile and hematite

AU - Fokkink, L. G.J.

AU - de Keizer, A.

AU - Lyklema, J.

PY - 1989/1/1

Y1 - 1989/1/1

N2 - The surface charge σ0 on aqueous suspensions of hematite and rutile was measured as a function of pH in various KNO3 concentrations and at different temperatures. Two types of congruences were observed: (a) if σ0 is plotted as a function of the pH minus the pzc, curves on these two oxides coincide at the same KNO3 concentrations and (b) the same is observed for σ0 as a function of temperature. Thermodynamic analysis enabled us to separate double layer parameters into oxide-specific and generic contributions. Standard Gibbs energies, enthalpies, and entropies for proton adsorption were obtained.

AB - The surface charge σ0 on aqueous suspensions of hematite and rutile was measured as a function of pH in various KNO3 concentrations and at different temperatures. Two types of congruences were observed: (a) if σ0 is plotted as a function of the pH minus the pzc, curves on these two oxides coincide at the same KNO3 concentrations and (b) the same is observed for σ0 as a function of temperature. Thermodynamic analysis enabled us to separate double layer parameters into oxide-specific and generic contributions. Standard Gibbs energies, enthalpies, and entropies for proton adsorption were obtained.

UR - https://www.scopus.com/pages/publications/0000993526

U2 - 10.1016/0021-9797(89)90012-X

DO - 10.1016/0021-9797(89)90012-X

M3 - Article

AN - SCOPUS:0000993526

SN - 0021-9797

VL - 127

SP - 116

EP - 131

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 1

ER -

Temperature dependence of the electrical double layer on oxides: Rutile and hematite

Abstract

Access to Document

Other files and links

Cite this