X-ray Photoelectron Spectroscopy of Fast-Frozen Hematite Colloids in Aqueous Solutions. 2. Tracing the Relationship between Surface Charge and Electrolyte Adsorption

被引：24

作者：

Boily, Jean-Francois ^{[1
]}

Shchukarev, Andrei ^{[1
]}

机构：

[1] Umea Univ, Dept Chem, SE-90187 Umea, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 06期

关键词：

CRYSTAL FACES; XPS; WATER; MODELS; COAGULATION; PARTICLES; STABILITY; HYDROXYL;

D O I：

10.1021/jp908197f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Colloidal-sized hematite spheroids exposed to aqueous NaCl solutions were investigated by X-ray photoelectron spectroscopy using the fast-frozen technique. The O 1s region provided evidence for (de)protonation reactions of surface (hydr)oxo groups of OH-enriched/O-depleted hematite Surfaces. These results were also correlated to changes in sodium (Na 1s) and chloride (Cl 2p) contents with pH. Electrolyte ion surface loadings were successfully predicted using a classic thermodynamic adsorption model normalized for surface site density. These efforts pointed to ion-specific inner-Helmholtz plane capacitances.

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页码：2613 / 2616

页数：4

相关论文

共 39 条

[1] Surface hydroxyl configuration of various crystal faces of hematite and goethite [J].

Barron, V ;

Torrent, J .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1996, 177 (02) :407-410

[2]

Bockris J.O.M., 1993, Surface Electrochemistry: A Molecular Level Approache

[3] Charge localization in cation-sulfate complexes: Implications for thermodynamic surface complexation models of the mineral/water interface [J].

Boily, Jean-Francois .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (03) :1299-1306

[4] Modeling proton binding at the goethite (α-FeOOH)-water interface [J].

Boily, JF ;

Lützenkirchen, J ;

Balmès, O ;

Beattie, J ;

Sjöberg, S .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 179 (01) :11-27

[5] LYOTROPIC EFFECT IN SURFACE-CHARGE, ELECTROKINETICS, AND COAGULATION OF A HEMATITE DISPERSION [J].

COLIC, M ;

FUERSTENAU, DW ;

KALLAY, N ;

MATIJEVIC, E .

COLLOIDS AND SURFACES, 1991, 59 :169-185

[6] Surface-sensitive Fe 2p photoemission spectra for α-Fe2O3(0001):: The influence of symmetry and crystal-field strength -: art. no. 205414 [J].

Droubay, T ;

Chambers, SA .

PHYSICAL REVIEW B, 2001, 64 (20)

[7] Adatom Fe(III) on the hematite surface: Observation of a key reactive surface species [J].

Eggleston, CM ;

Stack, AG ;

Rosso, KM ;

Bice, AM .

GEOCHEMICAL TRANSACTIONS, 2004, 5 (02) :33-40

[8] Electrical double-layer structure at the rutile-water interface as observed in situ with small-period X-ray standing waves [J].

Fenter, P ;

Cheng, L ;

Rihs, S ;

Machesky, M ;

Bedzyk, MJ ;

Sturchio, NC .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2000, 225 (01) :154-165

[9] Mineral-water interfacial structures revealed by synchrotron X-ray scattering [J].

Fenter, Paul ;

Sturchio, Neil C. .

PROGRESS IN SURFACE SCIENCE, 2004, 77 (5-8) :171-258

[10] Effects of different crystal faces on the surface charge of colloidal goethite (α-FeOOH) particles:: An experimental and modeling study [J].

Gaboriaud, F ;

Ehrhardt, J .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2003, 67 (05) :967-983

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